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ALLUVIAL VALLEY FLOOR STUDY

SOUTH HEART PROJECT STARK COUNTY, NORTH DAKOTA

REVISION 4

Prepared for: South Heart Coal LLC 173 Cottonwood Road Townsend, Montana 59644

Prepared by: Golder Associates Inc. 44 Union Boulevard, Suite 300 Lakewood, Colorado 80228

Distribution: 1 copy – North Dakota Public Service Commission (electronic) 1 copy – South Heart Coal LLC (electronic) 1 copy – Golder Associates Inc. – Denver

July 14, 2008

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OFFICES ACROSS AFRICA, ASIA, AUSTRALIA, EUROPE, NORTH AMERICA AND SOUTH AMERICA

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TABLE OF CONTENTS 1.0  2.0  3.0 
3.1  3.2 

INTRODUCTION .............................................................................................................. 1  PREVIOUS ALLUVIAL VALLEY FLOOR STUDIES ................................................. 4  SUPPLEMENTAL ALLUVIAL VALLEY FLOOR STUDIES ..................................... 5 
Geology and Geomorphology ............................................................................................. 5  Water Resources ................................................................................................................. 9  3.2.1  Land Use .................................................................................................................... 10  3.2.2  Flood Irrigation Practices ........................................................................................... 11  3.2.3  Flood Irrigation Potential ........................................................................................... 13  3.2.4  Subirrigation ............................................................................................................... 17 

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SUMMARY AND CONCLUSIONS .............................................................................. 22  REFERENCES ................................................................................................................. 23 LIST OF TABLES

Table 1 Table 2 Table 3 Table 4 Table 5 Table 6

Contributing and Non-Contributing Watersheds, South Heart Project, North Dakota Dimensions of Geomorphic Features Summary Surface Water Quality Results Heart River, South Branch Heart River, and South Tributary, South Heart Project, North Dakota Monitoring Well and Staff Gage Locations, South Heart Project, North Dakota Monitoring Well Construction Summary, South Heart Project, North Dakota Water Levels in Groundwater Wells and Staff Gages Along Stream Channels, South Heart Project, North Dakota

LIST OF FIGURES
Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9A Figure 9B Figure 9C Figure 9D Figure 9E Figure 9F Figure 9G Figure 9H Figure 9I Figure 10 Figure 11 Alluvial Valley Floor Study Area Contributing and Non-Contributing Watersheds Unconsolidated Deposits in the Alluvial Valley Floor Study Area Land Use in Potential Alluvial Valley Floor Area Water Permits Stark County, North Dakota Average Monthly Flows at USGS Stream Gage 06343000 Heart River Near South Heart July 1946 – September 1984 Soils and Irrigation Suitability Ground Water Potentiometric Surface in Unconsolidated Deposits SHMW-01A Hourly Water Levels with Upper and Lower Bounds of Measurement Error SHMW-09A1 Hourly Water Levels with Upper and Lower Bounds of Measurement Error SHMW-09A2 Hourly Water Levels with Upper and Lower Bounds of Measurement Error SHMW-11A1 Hourly Water Levels with Upper and Lower Bounds of Measurement Error SHMW-11A2 Hourly Water Levels with Upper and Lower Bounds of Measurement Error SHMW-14A1 Hourly Water Levels with Upper and Lower Bounds of Measurement Error SHMW-14A2 Hourly Water Levels with Upper and Lower Bounds of Measurement Error SHMW-15A1 Hourly Water Levels with Upper and Lower Bounds of Measurement Error SHMW-15A2 Hourly Water Levels with Upper and Lower Bounds of Measurement Error SHMW-09A2 Water Levels and Stream Flow Hydrographs Late July 2007 SHMW-15A1 Water Levels and Stream Flow Hydrographs Late July 2007

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LIST OF APPENDICES
Appendix A Appendix B Appendix C Appendix D Stream Channel Cross Sections Representative Photographs Boring Logs Monitoring Well Construction Forms

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1.0

INTRODUCTION

Golder Associates Inc. (Golder), on behalf of South Heart Coal LLC, prepared this report in conjunction with a mine permit application to assess the possible presence of an alluvial valley floor in or adjacent to the proposed mine permit area near South Heart, North Dakota. The mine permit area is located in Stark County southwest of the City of South Heart in Township 139N Range 98W and a small portion of Township 138N Range 98W. The proposed mine permit area is shown on Figure 1. The study area assessed for possible alluvial valley floors (Study Area) included the proposed mine permit area and adjacent areas within an approximate one-mile radius (Figure 1). The Study Area was examined for identification of possible alluvial valley floors based on geologic and water resources criteria described in Alluvial Valley Floor Identification and Study Guidelines published by the Office of Surface Mining Reclamation and Enforcement (OSM, 1983) and the North Dakota Public Service Commission (PSC) regulatory definitions (North Dakota Administrative Code [NDAC] §69-05.2-08-13). The scope of this investigation included: • • • • Evaluation of previous studies and available data; Identification of site-specific focus areas; Development and implementation of supplemental field studies; and Data evaluation to determine whether or not alluvial valley floors are present in or adjacent to the proposed mine permit area.

Alluvial Valley Floor Definition and Regulatory Requirements Alluvial valley floors are defined by two criteria: geologic and water resources. The geologic criteria of an alluvial valley floor are a topographic valley having an associated stream channel that is underlain by unconsolidated, stream-laid deposits. Alluvial valley floors do not include upland areas generally overlain by colluvial deposits, talus, other mass movement accumulation, and windblown deposits (North Dakota Century Code [NDCC] §38-14.1-02.1 and 30 CFR 701.5). Alluvial valley floors must also meet water resources criteria such that there is sufficient water to support agricultural activities, defined as: …[T]he use of any tract of land for the production of animal or vegetable life, where the use is enhanced or facilitated by subirrigation or flood irrigation associated with alluvial valley floors. These uses include the pasturing, grazing, or watering of

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livestock, and the cropping, cultivation, or harvesting of plants whose production is aided by the availability of water from subirrigation or flood irrigation. Those uses do not include agricultural practices which do not benefit from the availability of water from subirrigation or flood irrigation (NDAC §69-05.2-01-02.3). Sufficient water availability is shown by: • •

The existence of flood irrigation in the area or its historical use; The capability to be flood irrigated, based on streamflow water yield, soils, water quality, and topography; or Subirrigation of the lands from the ground water system of the valley floor (NDAC §69-05.2-08-13.2).

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NDAC §69-05.2-08-13.1 requires that prior to submitting a mine permit application for operations in or adjacent to an area holding a stream that the applicant shall either affirmatively demonstrate, based on available data, the presence of an alluvial valley floor, or submit the results of a field investigation of the permit and adjacent areas to enable the PSC to make an evaluation regarding the existence of the probable alluvial valley floor in the permit or adjacent area. Specifically, as described under NDAC §69-05.2-08-13.1 the investigation must include “an appropriate combination, adapted to site-specific conditions” of: • • • • •

Mapping of the probable alluvial valley floor; Mapping of all lands included in the area used for agricultural activities; Mapping of all lands that are or were historically flood irrigated; Documentation that areas identified in this section are, or are not, subirrigated; Documentation, based on representative sampling that areas identified under this subdivision are, or are not, flood irrigable; and Analysis of a series of aerial photographs, including color infrared imagery.

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Based on the geologic and water resource definition of an alluvial valley floor and the requirements of NDAC §69-05.2-08-13.1, Golder conducted supplemental studies to assist the PSC in making an evaluation regarding the existence of probable alluvial valley floors in or adjacent to the permit area. This report presents: •

The results of a previous regional, reconnaissance-level investigation to map potential alluvial valley floors; Conclusions of recent geology and geomorphology field investigation conducted by Golder to map unconsolidated deposits and identify flood plains and terraces along stream valleys in the Study Area to determine if they meet the geologic criteria of an alluvial valley floor; A summary of regional and local agricultural practices and a map of agricultural land use within areas previously defined as potential alluvial valley floors; A summary of current and historic irrigation practices, including flood irrigation, based on interviews with agricultural operators within the potential alluvial valley floor areas and permitted diversions within Stark County; A discussion of the potential for flood irrigation within the potential alluvial valley floor area, based on stream flow and quality data, soils information, and topographic characteristics; and The results of a comprehensive investigation to determine if areas within the potential alluvial valley floors are, or are not, subirrigated based on review of aerial photography, vegetation surveys, and a groundwater monitoring program.

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2.0

PREVIOUS ALLUVIAL VALLEY FLOOR STUDIES

The OSM published the draft report Reconnaissance Maps to Assist in Identifying Alluvial Valley Floors, West-Central North Dakota with the objective to identify areas that were likely to meet the definition of alluvial valley floors based on Federal Regulations (OSM, 1985). The intent of the study was to develop a regional understanding of the types of valleys that may be further studied for consideration as alluvial valley floors and therefore recognized that detailed studies for any specific area may more conclusively prove or disprove the presence of alluvial valley floors. The OSM study specifically mapped areas 1) that are underlain by unconsolidated deposits, 2) where surface water irrigation is practiced, 3) where natural flood irrigation occurs, or 4) where groundwater occurs at sufficiently shallow depths that vegetation can tap available supply. The maps were based on data primarily from limited field investigations, and supplemented with information from published reports, interpretation of aerial photography and Landsat imagery, and review of geologic and soils data to evaluate the regional geomorphology, agricultural and irrigation practices and water availability to identify potential alluvial valley floors. Within the Study Area, the OSM report (1985) designates the valleys of the Heart River, the South Branch Heart River, and a tributary to the South Branch Heart River, herein referred to as the South Tributary, as being potential alluvial valley floors (Figure 1). The Heart River, according to the OSM study, is designated as naturally irrigable along the second terrace as far upstream as Norwegian Creek. The OSM study reported the occurrence of natural irrigation and subirrigation along the lower terraces. The OSM study further reported the second terrace of the South Branch Heart River, a major tributary to the Heart River, to be naturally flood irrigated as far upstream as Bull Creek; however, no subirrigation is noted. Many small tributaries in the Heart River drainage (e.g. South Tributary) appear to be subirrigated based on interpretation of Landsat imagery indicating late-growing season vegetative productivity. This potential increased productivity, however,

is probably the result of increased soil moisture due to natural flooding rather than subirrigation (OSM, 1985). The areas identified by the OSM as potential alluvial valley floors within the Study Area (Figure 1) provided a starting point for Golder’s more detailed supplemental studies.

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3.0

SUPPLEMENTAL ALLUVIAL VALLEY FLOOR STUDIES

Based on the potential alluvial valley floor reconnaissance study by the OSM, Golder designed and implemented supplemental studies to assess the presence of alluvial valley floors in and adjacent to the mine permit area. Detailed studies included: • A geology and geomorphology study to delineate the alluvial channels and terraces and evaluate the potential for flooding; A land use survey to map areas used for agricultural production and interview agricultural operators to identify regional land use and irrigation practices; A soils survey to identify soil types and their suitability for irrigation; A vegetation survey to characterize non-agricultural vegetation along the rivers and to approximate the presence of subirrigation; and A groundwater investigation to evaluate if areas are or are not subirrigated.

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In general, Golder used the OSM study as a starting point for their supplemental investigations to identify potential alluvial valley floors within the Study Area along the Heart River, the South Branch Heart River, and the South Tributary. The detailed studies were designed to evaluate the presence or absence of alluvial floors along the valleys in and adjacent to the mine permit area. Results and conclusions of the studies regarding alluvial valley floors are presented below. The information is organized based on the definition of alluvial valley floors (NDCC §38-14.1-02.1) and regulatory requirements (NDAC §69-05.2-08-13.1). 3.1 Geology and Geomorphology

Alluvial valley floors are partly defined by the geologic criteria of unconsolidated stream-laid deposits (NDAC §69-05.2-08-13.2). The OSM reconnaissance maps indicate that the Heart River, South Branch Heart River, and the South Tributary are potential alluvial valley floors and therefore underlain by unconsolidated stream-laid deposits (Figure 1). As part of baseline studies conducted to support the mine permit application, Golder conducted detailed geology and geomorphology studies to identify unconsolidated stream-laid deposits within the Study Area. The studies included: • • Identifying the contributing and non-contributing watersheds; Describing the major drainage ways;

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-6Mapping probable unconsolidated deposits; Identifying fluvial landforms; and Characterizing the geomorphology of the major drainage ways.

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The Study Area lies in the Upper Heart River watershed (Hydrologic Unit Code 10130202). The contributing sub-watersheds to the Study Area lie in the South Branch Heart River watershed (1013020201) and non-contributing sub-watersheds lie in the Ash Creek watershed (1013020203). The contributing and non-contributing watersheds are shown on Figure 2 and summarized in Table 1. The Study Area is characterized by gentle topography with variable relief ranging from 100 to 200 feet within drainage sub-basins. The drainage density is relatively low (approximately 3 miles per square mile) with vegetated watercourses and sheet flow conveying most surface water to larger alluvial watercourses. The main water courses in the Study Area include: • Heart River – The Heart River is a perennial alluvial stream in the Study Area that originates in the prairie west of the Study Area and flows east through the northern portion of the Study Area to the City of South Heart and downstream to Patterson Lake and the City of Dickinson. South Branch Heart River – The South Branch Heart River is an intermittent alluvial stream in the Study Area that originates southwest of the Study Area in prairie and the Little Badlands, an area of erodible clays that contribute high levels of clay to the stream. The South Branch Heart River flows northeast across the Study Area and joins the Heart River west of the City of South Heart. South Tributary – The South Tributary is an intermittent alluvial stream in the Study Area that originates in the Little Badlands and joins the South Branch Heart River from the south in the southern half of the Study Area. West Tributary – The West Tributary is an ephemeral vegetated stream channel in the Study Area that originates in the western portion of the Study Area and flows east to join the South Branch Heart River.

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The unconsolidated deposits within the Study Area (Figure 3) were mapped based on literature, aerial photo interpretation and field surveys. Unconsolidated deposits, however, are ubiquitous in most stream valleys in the semiarid and arid western U.S. and may be composed of debris from several processes including streamflow, gravity, and wind (OSM, 1984). The mapped units represent

unconsolidated deposits along the stream valleys that are likely stream-laid (alluvium) but may include deposits that are emplaced by other forces and therefore do not necessarily identify areas that meet the geologic criteria of alluvial valley floors. The unconsolidated deposits are classified by

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relative age as modern and older. The modern unconsolidated deposits likely consist of alluvium emplaced from the current stream channel. Older unconsolidated deposits were identified in areas where evidence of historic stream channels (e.g., relict oxbows) was present or where the unconsolidated material appeared to differ laterally from modern unconsolidated deposits closer to the current stream channel. A geomorphology survey identified fluvial landforms within the Study Area, such as terraces and floodplains, that may suggest the presence of unconsolidated stream-laid deposits. The geomorphology survey consisted of a preliminary survey of topographic maps and aerial photos to identify alluvial and non-alluvial (vegetated) drainage ways followed by field investigations and analysis of a digital elevation model. Field data were collected at 10 locations along alluvial channels in the Study Area shown on Figure 3. Field-measured stream channel cross sections at the survey locations, cross sections from a high-resolution digital elevation model, and a table summarizing the cross sections are provided in Appendix A. Representative field photographs of the channel A summary of the geomorphology is

morphology and materials are provided in Appendix B. provided below.

The occurrence of alluvial channels is directly related to drainage area size and channel gradient. Alluvial channel slopes in the Study Area range from 0.0005 to 0.003, with drainage areas ranging from approximately 10,000 to 100,000 acres. Vegetated channel slopes in the Study Area range from 0.005 to 0.2, with drainage areas ranging from approximately 0.5 to 1,400 acres. The transition between vegetated and alluvial channels appears to occur in drainages with areas between 1,000 and 10,000 acres. There were no high gradient alluvial channels with small drainage areas observed within the Study Area. Within the Study Area, the Heart River, South Branch Heart River, and the South Tributary were identified as alluvial channels. The West Tributary was not identified as a potential alluvial valley floor in the OSM (1985) study. Golder mapped potential unconsolidated deposits along potions of the West Tributary in the Study Area; however, further investigations characterized the West Tributary as a vegetated stream channel without significant fluvial landforms indicating the unconsolidated deposits are not stream-laid. The West Tributary, therefore does not meet the geologic criteria of an alluvial valley floor and was removed from further consideration as an alluvial valley floor. Fluvial landforms, such as active floodplains and terraces, were also identified from field surveys and evaluation of cross sections. Active floodplains are defined as the part of the valley floor that is undergoing net growth during the present time (past 10 years or so) (Williams, 1978) and therefore

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are assumed to be composed of alluvium. However, in semiarid and arid environments, moderately to deeply incised streams typically lack an active floodplain because flood flows are typically contained within the banks. Overbank flows that would typically create an active floodplain are rare or absent (Ritter et al, 1995). Terraces are abandoned floodplains that were formed when the stream flowed at a higher level than present. Although active floodplains may not be present, terraces may be present and are assumed to be composed of alluvium. In order to identify active floodplains and terraces, other channel features were identified in the field and from cross sections. Bankfull stage is commonly defined as the stage of flow that fills a channel to the elevation of the active floodplain. However, if an active floodplain was not present, bankfull stage can be defined as the stage of prevailing flow in a channel. For this study, bankfull stage was identified in the field from the shape of the stream and vegetation patterns and are only approximate. The distance between the banks of the channel at the bankfull stage is the bankfull width. The point where a break in slope occurs between the scarp and tread of the lowest terrace was also identified. In channels with an active floodplain, this point was identified as the top of the active floodplain and defines the lateral extent of the active floodplain. In channels that lack an active floodplain, this point is defined as the top of flood channel and defines the lateral extent of the flood channel since flood flows are likely contained within the channel. The alluvial channels in the Study Area, including the Heart River, South Branch Heart River, and the South Tributary, are typically characterized by small, shallow, and moderately to deeply incised primary channels with beds and banks composed of thick, cohesive silty-clay material, in a confined valley with one or more terraces. These geomorphic features are indicative of streams with excess sediment transport capacity, which result in over-steepening and undercutting of the banks, downcutting, and bank slumping. Over time, these channel degradation processes result in a

floodplain that is no longer inundated under the current hydrologic regime. Active floodplains were identified only in the upper reaches of the South Branch Heart River and the South Tributary (SA-01, SA-02, and SA-06) alluvial channels. The remaining reaches are incised to such an extent that they appear to lack an active floodplain. Terraces were identified at all locations. Where active

floodplains were identified along the South Branch Heart River and the South Tributary, an upper and lower terrace were identified while only one terrace was identified along the remaining reaches. A summary of the dimensions of geomorphic features is provided in Table 2. The presence of

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alluvial channels, active floodplains, and terraces along the Heart River, South Branch Heart River, and lower portions of the South Tributary within the Study Area suggest that the valleys are underlain by unconsolidated stream-laid deposits and therefore meet the geologic definition of an alluvial valley floor. 3.2 Water Resources

Alluvial valley floors must also meet water resources criteria such that there is sufficient water for flood irrigation or subirrigation agricultural activities. Golder conducted several investigations to evaluate: 1) regional and local land use and irrigation practices; 2) the potential for flood irrigation based on soil types, channel morphology, and local knowledge; and 3) the occurrence of or potential for subirrigation. The results of these investigations indicate that within the Study Area the valleys associated with the Heart River, South Branch Heart River, and South Tributary do not meet the water resource criteria of an alluvial valley floor because: • Land use in and adjacent to the permit area for the production of animal or vegetable life is not enhanced or facilitated by flood irrigation or subirrigation; Flood irrigation does not exist or has not been historically used in the Study Area to support agricultural activities; The Heart River, South Branch Heart River, and South Tributary within the Study Area cannot regularly support diversions for flood irrigation to support agricultural activities especially during the moisture-stressed, late-growing season; The water quality of the surface water in the three rivers is unfavorable or unsuitable for irrigation; Terraces along the rivers are floodplains but appear to be flooded only by major events and not more frequent events that would support agricultural activities; and No significant diurnal fluctuations were identified in hourly water levels measured in the monitoring wells located in the alluvial valleys of the Heart River, South Branch Heart River, and South Tributary indicating that subirrigation is not present.

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Discussions leading to these conclusions are summarized in the following sub-sections.

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Pre-mining land use within the region and the permit area, including the Study Area, was studied as part of the baseline studies for the permit application. The study was completed by first interpreting aerial photography and subsequently conducting field investigations to verify these interpretations. The field investigations, including landowner interviews, were used to refine field maps and fully document the uses and management history for the prior five years. The primary agricultural activity in the region and within the mine permit area is dryland farming and stock grazing. The current and historic uses of the land comprising the mine permit area are the same and have not changed appreciably for at least five years prior to 2007. Discussions with agricultural operators and visual observation of the property and activities in the mine permit area suggest that land uses have not changed significantly for several decades. The most notable changes likely to have occurred relate to the specific cropping practices, including the crop rotations, agricultural inputs, and equipment, and the portion of the area cultivated each year. Regionally, the majority of cropland consists of spring wheat and hays (mixed hay, grass hay, and alfalfa hay). A number of other crops were occasionally planted and harvested during the previous five years and also planted in 2007. These crops include safflower, oat hay, barley hay, oats, corn silage, pasture (mixed hay that was grazed rather than harvested), millet hay, and barley, in order of decreasing frequency. Although not necessarily dominated by native species, uncultivated (i.e., not cropland) tracts are distributed throughout the permit area in flood-prone areas, areas with poor soils or steep slopes, and near fences and property lines on the fringes of cropland tracts. Along the river valleys, the primary land use is cropland and grasslands used as pasture as shown on Figure 4. Other land uses including structures, yards, corrals, road right-of-ways, etc., are present but do not provide significant vegetative production for agricultural use. Across the permit area, pasture grasslands on uplands and small tributaries are utilized at an average rate of 0.42 animal unit months per acre (AUMs/ac), while the river bottom grasslands are commonly utilized at a rate of approximately 1.0 AUMs/ac. This suggests that the herbaceous production of the river bottoms is significantly greater than that of the uplands. These river bottoms, however, are dominated by grass species, which likely do not have root systems capable of tapping the water tables to an extent that would result in this increased productivity. Given the rivers flood infrequently, it is more likely that the differences in production between upland and lowland grasslands are attributed to the shallow slopes, differences in soil texture and chemistry, topographic position (low vs. high in the landscape), and resultant differences in species composition. These characteristics are the same factors that lead

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to increased production in upland swales relative to adjacent hillslopes. Only a small portion of the cropland vegetation (primarily alfalfa) in the river valley, 70 out of 675 acres (approximately 10%), is deep-rooted perennial species that could potentially use groundwater or benefit from irrigation. Perennial croplands along the river bottoms are shown on Figure 4. Based on the definition of agricultural activities, the land use in and adjacent to the permit area for the production of animal or vegetable life is not enhanced or facilitated by subirrigation or flood irrigation, and therefore does not meet the land use definition of an alluvial valley floor. 3.2.2 Flood Irrigation Practices

The land use study concluded that the predominant regional and local land use is dryland farming and stock grazing on grasslands. Irrigation, therefore, plays a minor role in supporting agricultural production. All agricultural operators within the Study Area along the Heart River, South Branch Heart River, and South Tributary stated in interviews that no irrigated acreages occur on lands owned or under their control or management, either within or proximate to the Study Area. None of the operators have considered installing or constructing irrigation systems for agricultural production primarily due to limited quantity and poor quality of the water (discussed in Section 3.2.3). Site inspection confirmed that surface irrigation for agricultural production is not currently practiced within the proposed permit area or adjacent parcels. These observations are supported by the records of the North Dakota State Water Commission (NDSWC), which administers water use permits in the state. The NDSWC records reveal no existing Conditional or Perfected water permits for the

irrigation of cropland within the proposed mine permit area. A total of 61 groundwater and surface water irrigation permits including 86 points of diversion (PODs) are on record for Stark County as shown on Figure 5. No points of diversion for agricultural uses, however, are located in the Study Area. The active PODs within approximately 15 miles of the Study Area are discussed below and ordered from nearest to farthest from the mine permit area: • Two conditional PODs are used for non-agricultural irrigation at the Pheasant Country Golf Course located over one mile from the mine permit area. Two conditional PODs are located approximately five miles directly north of the mine permit area. These PODs are within the Heart River watershed and are associated with what appears to be a prominent seep or spring and an existing reservoir. Active irrigation, if any, was not observed on recent aerial photography.

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Twelve active PODs are located immediately downstream from Patterson Lake located over nine miles east of (down gradient from) the mine permit area. Nine of these PODs are perfected and are used for agricultural and nonagricultural (including another golf course) irrigation purposes. Reconnaissance investigations suggest that water is applied to the agricultural tracts through a combination of flood and sprinkler irrigation. Because these diversions are associated with Patterson Lake rather than small channel diversions, the conditions are not likely representative of those that could be developed in and immediately adjacent to the mine permit area. Three perfected PODs are located along the Green River approximately 11 miles northwest of the mine permit area. These PODs appear to be associated with 195 acres of permitted flood irrigation. The NDSWC’s database reports that these permits have been used to irrigate less than 70 acres in the last 10 years.

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These findings indicate that some irrigation from diversions is practiced in the region, although only one site, located along the Green River, receives irrigation water from direct diversion without an associated impoundment. Water use records for the Green River irrigation suggests that use has diminished in recent years. In general, the regional practice is that irrigation of agricultural crops by surface water or groundwater has not been implemented due to lack of water availability and poor water quality. The OSM study (1985) suggests that the Heart and South Branch Heart River valleys are natural flood irrigable. As part of Golder’s supplemental studies, however, operators were asked whether natural flooding occurred and, if so, whether it was beneficial or detrimental to agricultural operations. The operators with operations along the Heart River, South Branch Heart River, and South Tributary offered the following comments: • Flooding is detrimental. Fences are destroyed, trees are strewn around, and there is potential for damage to vegetation from the excess water. Estimated that the Heart River floods the terraces one year out of five (Meduna, 2007). Flooding is beneficial due to the additional moisture provided. Reported that major channels flood the terraces on his lands adjacent to the Heart River two out of every ten years (Wagner, 2007). Flooding is generally beneficial. Sediment deposition during flood events, however, reduces grass and alfalfa production. Harrowing is frequently required to minimize production loss following flood events. Reported that prior to the construction of the major bridges across the South Branch Heart River approximately ten years ago, terraces were flooded nearly every year. Now flooding is much more infrequent (P. Kuylen, 2007).

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Flooding is beneficial to pasture growth on lands adjacent to the South Branch of the Heart River, which floods one out of seven years (Perdaems, 2007).

Natural flooding does occur along the Heart River, South Branch Heart River, and South Tributary; however, it does not occur on an annual basis, and its benefits are not universal or consistent across the region or along the primary drainages. 3.2.3 Flood Irrigation Potential

Although no water diversions occur along the Heart River, South Branch Heart River, or South Tributary within the Study Area, the capability for flood irrigation was evaluated based on hydrographs, water quality, soils information, and channel morphology. Water Availability Stream flows along the Heart River, South Branch Heart River, and South Tributary are typical of western U.S. streams such that they are dominated by spring snowmelt and summer storm events. A hydrograph of the U.S. Geological Survey (USGS) stream gage downstream of the mine permit area on the Heart River (USGS 06343000) illustrates this point on Figure 6. Reaches of the South Branch Heart River and the South Tributary frequently dry out during the summer and early fall as noted in interviews and field observations. Reaches of the Heart River also dry out and consequently the Pheasant Country Club Golf Course in the City of South Heart uses two deep wells for irrigating when water can no longer be diverted from the Heart River. In general, the Heart River, South Branch Heart River, and South Tributary flood during spring runoff and flows diminish throughout the year and eventually reaches of the rivers routinely dry out. Based on this seasonal pattern the Heart River, South Branch Heart River, and South Tributary cannot regularly support diversions for flood irrigation to support agricultural activities especially during the moisture-stressed, late-growing season. Water Quality Surface water quality samples of waters from the Heart River, South Branch Heart River, and South Tributary are collected as part of the baseline studies at locations upstream and downstream in the Study Area. Sample collection locations are shown on Figure 1. Selected parameters related to classifying irrigation waters are presented in Table 2 (U.S. Salinity Lab, 1954). The results indicate that the waters of the South Tributary are classified as C2-S2, (medium salinity, medium sodium) at

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both the upstream and downstream sampling location (SHUN-03 and SHUN-04, respectively). This classification indicates that irrigation of plants with moderate salt tolerance with this water is possible if a moderate amount of leaching occurs. The water does present an appreciable sodium hazard in fine textured soils with high cation-exchange capacity but may be used on coarse textured or organic soils with good permeability. Waters of the Heart River upstream and downstream of the mine permit area are classified as C4-S4, very high salinity and sodium hazard, and are therefore unsuitable for irrigation. The South Branch Heart River is classified as C3-S2 (high salinity, medium sodium) upstream of the permit area and C3-S3 (high salinity, high sodium) downstream. These classifications indicate that irrigation with this water would require special management practices for salinity control and may produce harmful levels of sodium (U.S. Salinity Lab, 1954). Furthermore, a water quality study of Patterson Lake, downstream of the project site, states that 76.5% of the suspended sediment load in the lake originates from the South Branch Heart River and that 97% of the sediment is silty clay (North Dakota Department of Health, 2000). Based on results of water quality sampling, the waters of the South Tributary may be suitable for irrigations while the waters of the Heart River and South Branch Heart River are not well suited for irrigation. Soils The soil survey and land capability classification estimated that approximately one-third of the soils across the permit area have only moderate limitations to crop production, with the remaining two-thirds having either severe to very severe limitations. The most common reasons for ratings of “severe” or higher ratings are salinity, sodicity, and shallow bedrock. Soils suitable for irrigation comprise only a very small portion of the proposed permit area and are generally found immediately adjacent to the Heart River and South Branch Heart River channels. The flat alluvial valley bottoms are dominated by the Havrelon and Trembles series and similar soils that exhibit good drainage; however, the finer textures of the dominant series, primarily Havrelon, limit suitability for irrigation due to the poor quality of the water in the Heart River and South Branch Heart River. The coarser textured soils such as the Trembles series are considered irrigable but are present to a significantly lesser extent in the area. In addition, the salinity and sodicity commonly found in the subsoil of these series would further limit their suitability for irrigation. The irrigation suitability of soils in the potential alluvial valley floor area within the Study Area are represented on Figure 7. The soils are ranked for irrigation suitability based primarily on soil texture and structure, subsurface soil chemistry, drainage, topography, and depth to bedrock. Other factors considered in the ranking include the soils’ status as a prime farmland soil or farmland of statewide importance. The ranking is

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intended to evaluate the relative irrigation potential of the soils in the Study Area. The rankings are as follows: 1. Highly suitable for irrigation; often classified as a Prime Farmland soil. 2. Suitable for irrigation; sometimes classified as Farmland of Statewide Importance. 3. Limited Suitability; depending on conditions, it may be possible to irrigate this soil type. 4. Low Suitability; notable limiting characteristics reduce suitability without mitigation or careful management. 5. Unsuitable. Channel Morphology Golder’s geomorphology study characterized the alluvial channels of the Heart River, South Branch Heart River, and South Tributary to assess the potential for flood irrigation. As described in

Section 3.1, the channels in the Study Area are typically characterized by small, shallow, and moderately to deeply incised primary channels in a confined valley with one or more terraces. These features are indicative of streams with excess sediment transport capacity that result in over-steepening and undercutting of banks, downcutting, and bank slumping. These channel

degradation processes incise the stream channels to such an extent that active floodplains becomes terraces that are no longer inundated with agriculturally-beneficial flows under the current hydrologic regime. Active floodplains were identified only in the upper reaches of the South Branch Heart River and the South Tributary (SA-01, SA-02, and SA-06) alluvial channels. The remaining reaches are incised to such an extent that they appear to lack an active floodplain. Terraces, or abandoned floodplains, were identified at all locations. Although active floodplains are likely present at a few locations in the Study Area, the overall channel morphology suggests that the potential of agriculturally-beneficial natural flooding is unlikely. The South Branch Heart River in the Study Area is generally a relatively narrow and shallow stream channel that averages 17 feet wide and 3 feet deep at bankfull. The flood channel is moderately to deeply incised within a lower terrace that is between 5 and 17 feet above bankfull depth and between 64 and 122 feet wide. The lateral extent of the lower terrace averages approximately 1,444 feet on

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the left bank and 254 on the right bank measured from the thalweg. Maximum water depth in late May 2007 was measured at less than 2 feet. The upper reach of the South Branch Heart River (SA-06) is similarly incised to the downstream locations with a slightly longer than average bankfull width of 21 feet and slightly greater than average depth of 4 feet. This reach appears to have an active floodplain with a total lateral extent of between 136 and 139 feet. The top of the active floodplain is approximately 8 to 12 feet above bankfull stage and is incised approximately 4 to 8 feet within the lower terrace. The lower terrace extends approximately 292 feet on the left bank and 246 feet on the right bank from the thalweg. An upper terrace is present along the left bank that extends approximately 1,234 feet beyond the first terrace. Active floodplains were not identified along the majority of the South Branch Heart River in the Study Area. Assuming the bankfull flow (3 feet) has a recurrence interval of about two years, it is unlikely that frequent and agriculturally more useful floods could reach the top of the terraces that average 11 feet above bankfull. The potential for natural flood irrigation of the terraces along the South Branch Heart River is therefore unlikely. The South Tributary shows similar geomorphic characteristics as the upper reach of the South Branch Heart River, albeit slightly less incised. The bankfull width ranges from 9 to 35 feet and is

approximately 1 to 4 feet deep. The top of the active floodplains averages 6 feet above bankfull stage with a total lateral extent ranging from 81 to 162 feet. A lower terrace is present along both banks extending an average of approximately 494 feet on the left bank and 483 feet on the right bank. An upper terrace extends an average of approximately 629 and 403 feet beyond the lower terrace on the left and right banks respectively. While an active floodplain may be present, the smaller drainage area and low flows, would suggest that the channel only floods during large, infrequent runoff events. The Heart River channel is also a relatively narrow and shallow stream channel in the Study Area that averages approximately 24 feet wide and approximately 4 feet deep at bankfull. The flood channel is incised within terraces that average about 7 feet above bankfull and between 39 and 62 feet wide at the top. The total lateral extent of the terrace averages approximately 1,363 feet across the entire valley. The Heart River meanders across the terrace confined to the south by the valley slope and to the north by the bed of the railroad tracks. North of the railroad tracks, the terrace appears less developed and may be segregated from the main stem of the Heart River. Oxbow lakes and

abandoned channels appeared to have been formed along the terrace of the Heart River in the Study

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Area from the railroad track bed cutting off portions of the stream channel. Maximum measured water depth in late May 2007 was approximately 2 feet. The Heart River appears to be less incised than the South Branch Heart River based on the bankfull stage and width. Assuming the bankfull flow (4 feet) has a recurrence interval of about two years, it is unlikely that agriculturally more useful floods would reach the top of the terraces that average 7 feet above bankfull. Therefore, the potential for natural flood irrigation from the Heart River is unlikely. 3.2.4 Subirrigation

The potential for subirrigation within the Study Area was evaluated based on agricultural assessment, interviews with local agricultural operators, remote sensing, vegetation field investigation, installation and monitoring of ground water well clusters and staff gages to characterize ground water and surface water interactions at sites adjacent to alluvial channels and hourly water level measurement in the alluvial wells to assess diurnal fluctuations. Subirrigation is a primary indicator of alluvial valley floors. Subirrigation, with respect to alluvial valley floors, is defined in the PSC regulations as “…The supplying of water to plants from a semi-saturated or saturated subsurface zone where water is available for use by vegetation…” (PSC 69-05.2-01-02.103). OSM further defines subirrigation as the supply of water to plant roots from an underlying ground-water system such that the vegetation is more productive than in other areas and that the vegetation continues to grow during the moisture-stress portion of the growing season. Some low-lying areas have greater vegetation productivity than adjacent uplands merely because of better soils, snow drift accumulation, or occasional flood overflow. These areas are not considered to be subirrigated (OSM, 1983). Regional and Local Significance Regionally, subirrigation plays a very minor role toward agricultural production (Heilig, 2007). The frequency of subirrigation in Stark County is minor and any areas of subirrigation consist of small acreages, whereby the influence on overall production is small (Kempenich, 2007). Operators along the Heart River, South Branch Heart River, and South Tributary within the Study Area stated in interviews that, in general, no subirrigation occurs as identified by increased agricultural production (see references). The one exception to this is a parcel on the north bank of the Heart River where the operator believes the fields on the terrace are subirrigated. Based on the

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regional agricultural assessment and interviews with local operators, however, subirrigation does not significantly influence hay or crop production and therefore, in this case, would not indicate the presence of a potential alluvial valley floor. Remote Sensing The Office of Surface Mining (OSM, 1985) interpreted potential subirrigation from near-infrared color composites and black-and-white Landsat imagery taken during the moisture-stress period of the late growing season in five different years (1975-1976, 1978-1980). Mean annual precipitation ranged from 25% above normal to 24% below normal during these years. The selected band of Landsat data indicates the relative moisture content of vegetation. Subirrigation is interpreted as vegetation growth during the late growing season during most of the evaluated years. Areas which indicate high relative vegetative moisture content during the wettest years were not considered. The OSM study combined the results of the imagery analysis with other factors, described in Section 2.0, resulting in composite reconnaissance maps of potential alluvial valley floor areas. The areas presented by OSM as potential alluvial valley floors included potentially subirrigated areas. No subirrigation was noted along the South Branch Heart River and was potentially present along the first terrace of the Heart River. The South Tributary, a minor tributary to the South Branch Heart River, is indicated as being subirrigated; however, the OSM study (1985) suggests that this interpretation is probably the result of increased soil moisture due to natural flooding rather than subirrigation. Golder interpreted color and infrared aerial photos taken in June 2006 to determine areas of potential subirrigation. No significant difference was noted between upland and valley vegetative production; however, the photos reviewed were taken during at a time of typically high vegetative production when differences may be difficult to determine. Vegetation Vegetation along the potential alluvial valley floor areas within the Study Area was identified during Golder’s field investigations. The terraces of the Heart River are dominated by introduced grasses, primarily smooth brome and Kentucky bluegrass. Twenty-inch deep holes excavated to evaluate hydric soils did not indicate mottling or gleying on the terraces and soil saturation was not present in this zone suggesting that subirrigation is not present. The floodplains of the South Branch Heart River and South Tributary, unlike the Heart River valley, support an extensive riparian woodland

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dominated by boxelder and green ash with some American elm (phreatophytes). The understory of the riparian woodland is dominated by primarily herbaceous upland species, including smooth brome, Kentucky bluegrass, and spearscale. Portions of the riparian woodland type have a shrub understory with common species including western snowberry, common chokecherry, Wood’s rose, and silver buffaloberry. Non-agricultural vegetation along the Heart River, South Branch Heart River, and South Tributary valley floors evaluated during baseline vegetation and wetland inventories may indicate the presence of subirrigation associated with the wetlands. Ground Water and Surface Water Interaction In May 2007, Golder installed 14 groundwater monitoring wells and 5 staff gages at 5 sites adjacent to the alluvial channels of the Heart River, the South Branch Heart River, and the South Tributary as part of the baseline investigation to characterize ground water-surface water interactions and evaluate if subirrigation exists. The wells and staff gages were located in areas of likely subirrigation based on potential alluvial valley floor maps from OSM (1985), aerial photos, and soils information. The locations of the wells and staff gages are shown on Figures 1 and 8 and the coordinates presented in Table 3. In general, one monitoring well (MW designation) was completed in shallow bedrock (S – well) and one or two others were completed in the alluvium (A - wells) at each site to assess vertical hydraulic gradients within the alluvium and between the bedrock and alluvium. Each unit (alluvium or bedrock) was identified in the field at the time of drilling. In one instance, at

SHMW-15A2, the geologic unit screened behaved as unconsolidated material but was likely weathered bedrock and not alluvium as indicated by the “A” designation of the well identification. The bedrock screened in the S-wells included some portion of coal which is likely the D Coal (the coal to be mined) at all locations based on a review of D Coal elevations in nearby boreholes. One boring log was prepared for each of the well sites, down to the depth of the deepest well at each site. These logs are presented in Appendix C. Monitoring well construction forms are presented in Appendix D and a summary of the well construction is provided in Table 4. A staff gage

(SG designation on Figures 1 and 8 and in Table 3) was placed in the stream adjacent to each well clusters to measure surface water elevation coincidently with the groundwater level measurements. Water levels are measured manually in the wells and staff gages each month. The monthly water level elevations recorded through the beginning of November 2007 are presented in Table 5. The water levels indicate that the South Branch Heart River and South Tributary are loosing streams, with surface water levels greater than adjacent ground water levels. No significant gradient is observed between the wells completed in bedrock and alluvium at each location. The similar water

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levels suggests that the bedrock and alluvium are hydraulically connected and that ground water flow direction may be predominately lateral and not significantly influenced by the losing stream. The ground water flow direction through the unconsolidated deposits within the Study Area is shown on Figure 8. Water levels along the Heart River indicate a gaining stream, with groundwater heads greater than surface water heads and an upward gradient between the bedrock and alluvium. In addition to monthly water level measurements, a pressure transducer installed in each well completed in alluvium measures water levels on an hourly frequency to assess diurnal fluctuations. Subirrigation, in the context of alluvial valley floors, can be determined by diurnal fluctuations of water levels due to differences in night and day evapotranspiration rates especially during the later, water-stressed growing season. Hourly water levels measured in nine of the alluvial wells between June 26 and November 7, 2007 are presented in Figures 9A to 9I. The hourly water level elevations were corrected for barometric pressure fluctuations using an on-site pressure transducer installed for that purpose. Overall, no significant diurnal fluctuations were identified in the hourly water levels in the alluvial wells indicating that subirrigation is not present. Recorded water levels are presented with upper and lower bounds of errors associated with the pressure transducers. The specifications of the instrument state the error as +/- 0.2% of full scale which is equivalent to 0.0716 feet of water. The error bounds show that all of the small fluctuations are less than the error in measurement in which case they are considered insignificant. At some well locations, small, diurnal fluctuations in water levels are present; however, the fluctuations are opposite of what would be expected if subirrigation were occurring: a rise in water level during the day and a decrease at night. These fluctuations are within the error bounds and may be explained by thermal heating of the cable, the well casing, or the water. Wells SHMW-09A2 and SHMW-15A1 show a notable rise in water level on July 19, 2007 that appears to be related to increased stream flows along the South Branch Heart River and the Heart River resulting from a storm event recorded at an on-site meteorological station that was installed during baseline studies. Hydrographs of ground water levels and stream flows along the South Branch Heart River in late July 2007 (Figure 10) show increased stream flow at the upstream and then the downstream locations following a precipitation event in the morning of July 18, 2007. Monitoring well SHMW-09A2 appears to respond to the increased stream flow further suggesting that the river and shallow ground water are connected. Hydrographs along the Heart River

(Figure 11) show a similar response; however, the stream is normally gaining at this location (ground water level are higher than stream levels) and the increased flow may temporarily reverse the gradient

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from the stream to the ground water. Other wells along the alluvial valleys show a similar but reduced reaction to the increased stream flows. The pressure transducer data also indicate a few downward spikes in water levels. These water level spikes are attributed to purging for water quality sampling (September 11 to 12, 2007), maintenance activities, or other uncontrolled influences (September 21 and October 1, 2007). While the uncontrolled influences are not fully understood, the water level spikes on September 21 and October 1, 2007 do not appear to be related to hydrologic or climatic influences.

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4.0

SUMMARY AND CONCLUSIONS

Alluvial valley floors are defined by two criteria: geologic and water resources. The geologic criteria are understood to be a topographic valley holding a stream underlain by unconsolidated stream-laid deposits. The water resources criteria state that the area must also supply sufficient water to support agricultural activities as shown by: 1) the existence of flood irrigation or its historical use, 2) the capability to be flood irrigated, or 3) subirrigation. According to previous studies and recent field studies, within the Study Area the valleys of the Heart River, South Branch Heart River, and South Tributary appear to be underlain by unconsolidated stream-laid deposits and therefore meet the geologic criteria of an alluvial valley floor. The primary land use in the region and in the permit area is and has been dryland farming and stock grazing on native grasslands. Limited water rights diversions for irrigation exist within the region; however, no diversions for agricultural use exist in the Study Area. Furthermore, agricultural operators in the Study Area do not irrigate the land and have not considered irrigation development due to poor water quality and lack of quantity. Flood irrigation is not used currently or historically for agricultural activities. The Heart River, South Branch Heart River, and South Tributary have little potential for routine annual flood irrigation based on lack of water availability, poor water quality, and narrow, incised channels with small terraces. The soils along the river valleys may be suitable for irrigation; however, interactions with the poor water quality may make them unsuitable for crop production. Finally, agricultural practices and lack of diurnal fluctuations in water table levels suggest that subirrigation is not present along the three valleys. Golder concludes that the valleys of the Heart River, South Branch Heart River, and South Tributary within and adjacent to the mine permit area do not meet the criteria of an alluvial valley floor.

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5.0

REFERENCES

30 CFR 701.5 (2002). Heilig, Jeanne, 2007. USDA-NRCS Soil Survey Leader, MLRA 54 and 58C, Personal communication to B. Gerbig, Catena Consulting, LLC regarding potential subirrigation, May 18, 2007. Kempenich, John, 2007. USDA-NRCS Soil Scientist, MLRA 54, Personal communication communication to B. Gerbig, Catena Consulting, LLC regarding potential subirrigation, May 21, 2007. Kuylen, Patrick, 2007. Agricultural Operator, South Heart, ND, Personal communication to B. Gerbig, Catena Consulting, LLC regarding land use and irrigation practices, July 3, 2007. Kuylen, Robert, 2007. Agricultural Operator, South Heart, ND, Personal communication to B. Gerbig, Catena Consulting, LLC regarding land use and irrigation practices, July 18, 2007. Meduna, Gary, 2007. Agricultural Operator, South Heart, ND, Personal communication to B. Gerbig, Catena Consulting, LLC regarding land use and irrigation practices, July 18, 2007. North Dakota Administrative Code §69-05.2 (1990). North Dakota Century Code §38-14.1-02. North Dakota Department of Health, Division of Water Quality, Surface Water Quality Management Program, 2000. Patterson Lake Diagnostic/Feasibility Study. Office of Surface Mining Reclamation and Enforcement, 1983. Alluvial Valley Floor Identification and Study Guidelines. Office of Surface Mining Reclamation and Enforcement, 1985. Reconnaissance Maps to Assist in Identifying Alluvial Valley Floors, West-Central North Dakota. Perdaems, James, 2007. Agricultural Operator, South Heart, ND, Personal communication to B. Gerbig, Catena Consulting, LLC regarding land use and irrigation practices, July 24, 2007. Ritter, Dale F. et al, 1995. Process Geomorphology, 3rd edition. Debuque, IA:Wm. C. Brown, 546 p.

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U.S. Environmental Protection Agency, 1976. Water Quality Criteria of 1976; Washington, Office of Water and Hazardous Materials. U.S. Department of Agriculture U.S. Salinity Lab, 1954. Diagnosis and Improvement of Saline and Alkaline Soils: U.S. Department of Agriculture Handbook 60. Wagner, Jim, 2007. Agricultural Operator, South Heart, ND, Personal communication to B. Gerbig, Catena Consulting, LLC regarding land use and irrigation practices, July 12, 2007. Williams, G.P., 1978. Bank-Full Discharge of Rivers. Water Resources Research 14(6):1141-1154.

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TABLE 1 CONTRIBUTING AND NON-CONTRIBUTING WATERSHEDS SOUTH HEART PROJECT, NORTH DAKOTA Contributing Watersheds Primary Secondary Watershed Watershed

Sub-Watershed* Upper Heart River above Belfield Norwegian Creek Upper Heart River above South Heart North and South Fork Bull Creek Bull Creek Upper South Branch Heart River Lower South Branch Heart River

Hydrologic Unit Code 101302020101 101302020102 101302020103 101302020104 101302020105 101302020106 101302020107

Upper Heart River

South Branch Heart River

Non-Contributing Watersheds Primary Secondary Watershed Watershed Upper Heart Ash Creek River

Sub-Watershed* North Creek Patterson Lake

Hydrologic Unit Code 101302020301 101302020304

*Sub-Watershed names are derived from local references and are not based on official names which may not be provided

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TABLE 2 DIMENSIONS OF GEOMORPHIC FEATURES SUMMARY SOUTH HEART PROJECT, NORTH DAKOTA Bankfull Width (feet) Left Bank 9 15 3 8 19 2 9 11 8 9 19 2 Right Bank 15 33 5 9 12 5 12 25 1 11 33 1 Total 24 36 18 17 25 11 21 35 9 19 36 9 Active Floodplain Width (feet) Left Bank ---71 77 65 78 106 30 76 106 30 Right Bank ---66 74 59 57 104 15 60 104 15 Total ---137 139 136 136 162 81 136 162 81 Flood Channel Width (feet) Left Bank 24 30 17 42 59 30 ---36 59 17 Right Bank 27 32 22 47 76 22 ---40 76 22 Total (ft) 51 62 39 89 122 64 ---76 122 39 First Terrace Width (feet) Left Bank 1331 1365 1298 1444 2300 292 494 680 308 1208 2300 292 Right Bank 32 34 30 254 886 44 483 854 111 256 886 30 Total 1363 1398 1328 1698 2344 538 977 1162 791 1463 2344 538 Left Bank ---1526 1526 1526 1123 1282 964 1258 1526 964 Second Terrace Width (feet) Right Bank ---246 246 246 886 918 854 673 918 246 Total ---1772 1772 1772 2010 2201 1818 1930 2201 1772

Stream Channel

Statistic

Depth (feet) 4 5 4 3 4 2 3 4 1 3 5 1

Depth to Bankfull (feet) ---10 12 8 6 9 4 7 12 4

Depth to Bankfull (feet) 7 9 5 11 17 5 ---9 17 5

Average Heart River Maximum Minimum South Branch Heart River Average Maximum Minimum Average South Maximum Tributary Minimum Average All Maximum Minimum

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TABLE 3 SURFACE WATER QUALITY RESULTS HEART RIVER, SOUTH BRANCH HEART RIVER, AND SOUTH TRIBUTARY SOUTH HEART PROJECT, NORTH DAKOTA SHHR-01 Heart River Upstream Sampling Event 09/2006 10/2006 11/2006 12/2006 01/2007 02/2007 03/2007 04/2007 05/2007 06/2007 07/2007 08/2007 AVERAGE TDS TSS (mg/L) (mg/L) 2460 2560 3200 3380 3080 5730 1610 1910 -2300 2680 2520 2857 36 28 15 8 7 9 32 56 -67 70 114 40 pH 8.6 8.5 8.2 7.9 7.9 7.7 8.1 8.0 -6.9 8.6 8.5 8.1 Na Mg (mg/L) (mg/L) 787 823 1020 1170 1080 1760 452 504 -696 790 814 900 28.6 31.8 42.4 64.1 41.3 77.4 32.0 53.3 -40.7 29.0 27.1 42.5 Ca (mg/L) 30.8 32.0 41.4 53.7 42.6 68.4 37.9 58.0 -43.6 31.8 28.2 42.6 Specific Conductance (μ mhos/cm) 3374 3409 3975 2024 4016 6760 2297 2554 -3257 3643 3142 3496 SAR 24.5 24.7 26.6 25.5 28.3 34.6 13.1 11.5 -18.2 24.4 26.3 23.3 Irrigation Classification C4 C4 C4 C3 C4 C4 C4 C4 -C4 C4 C4 C4 S4 S4 S4 S4 S4 S4 S3 S3 -S4 S4 S4 S4

SHHR-02 Heart River Downstream Sampling Event 09/2006 10/2006 11/2006 12/2006 01/2007 02/2007 03/2007 04/2007 05/2007 06/2007 07/2007 08/2007 AVERAGE TDS TSS (mg/L) (mg/L) 1190 1830 -4210 4380 6290 871 1960 1470 1230 528 2990 2450 13 10600 -34 2570 22 31 30 97 27 229 103 1251 pH 8.3 7.5 -7.8 7.8 7.8 7.8 8.1 7.0 6.7 7.0 8.6 7.7 Na Mg (mg/L) (mg/L) 370 504 -1410 1180 1810 225 492 315 314 109 823 687 8.7 23.1 -95.4 99.0 141.0 21.2 60.4 53.4 35.2 8.8 93.8 58.2 Ca (mg/L) 22.9 40.5 -115.0 146.0 147.0 31.3 76.7 61.9 51.5 20.7 92.2 73.2 Specific Conductance (μ mhos/cm) 1777 2462 -4072 4602 7416 1312 2654 1887 1764 707 3555 2928 SAR 16.7 15.7 -23.5 18.5 25.6 7.6 10.2 7.1 8.3 5.1 14.4 14.5 Irrigation Classification C3 C4 -C4 C4 C4 C3 C4 C3 C3 C2 C4 C4 S4 S4 -S4 S4 S4 S2 S3 S2 S2 S1 S4 S4

Notes: TDS = Total Dissolved Solids TSS = Total Suspended Solids SAR = Sodium Adsorption Ratio mg/L = milligrams per liter μmhos/cm = micro ohms per centimeter -- = not measured

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TABLE 3 SURFACE WATER QUALITY RESULTS HEART RIVER, SOUTH BRANCH HEART RIVER, AND SOUTH TRIBUTARY SOUTH HEART PROJECT, NORTH DAKOTA SHSB-01 South Branch Heart River Upstream Sampling Event 09/2006 10/2006 11/2006 12/2006 01/2007 02/2007 03/2007 04/2007 05/2007 06/2007 07/2007 08/2007 AVERAGE TDS TSS (mg/L) (mg/L) 425 1790 ----477 1130 1040 846 488 419 827 4420 960 ----29 50 11 62 509 4 756 pH 7.3 7.0 ----7.5 7.8 7.3 6.5 7.1 8.4 7.4 Na Mg (mg/L) (mg/L) 110 102 ----117 315 295 196 87.8 121 168 0.5 0.8 ----8.2 19.6 6.2 19.7 19.7 8.6 10.4 Ca (mg/L) 1.1 1.8 ----19.7 42.5 22.8 36.1 17.2 24.9 20.8 Specific Conductance (μ mhos/cm) 567 480 ----680 1625 1350 1176 555 701 892 SAR 21.8 15.9 ----5.6 10.0 14.1 6.5 3.4 5.3 7.5 Irrigation Classification C2 C2 ----C2 C3 C3 C3 C2 C2 C3 S4 S3 ----S1 S3 S3 S2 S1 S1 S2

SHSB-03 South Branch Heart River Downstream Sampling Event 09/2006 10/2006 11/2006 12/2006 01/2007 02/2007 03/2007 04/2007 05/2007 06/2007 07/2007 08/2007 AVERAGE TDS TSS (mg/L) (mg/L) 483 1070 -1430 1380 1120 783 1260 829 787 505 841 953 870 52 -31 13 43 7 14 2870 28 79 60 370 pH 7.2 7.8 -7.8 9.6 7.8 7.6 7.7 7.9 6.6 7.2 8.7 7.8 Na Mg (mg/L) (mg/L) 124 317 -522 433 380 192 296 274 216 102 330 290 1.3 7.3 -15.8 13.4 10.8 17.0 37.4 2.7 20.9 6.3 2.6 12.3 Ca (mg/L) 2.8 17.2 -27.2 3.1 17.4 33.5 63.6 8.5 35.8 14.2 8.0 21.0 Specific Conductance (μ mhos/cm) 608 1554 -1627 1870 1682 1141 1752 1301 1261 601 1316 1338 SAR 15.4 16.1 -19.7 23.8 17.6 6.7 7.3 21.0 7.1 5.7 25.9 12.4 Irrigation Classification C2 C3 -C3 C3 C3 C3 C3 C3 C3 C2 C3 C3 S3 S4 -S4 S4 S4 S2 S2 S4 S2 S1 S4 S3

Notes: TDS = Total Dissolved Solids TSS = Total Suspended Solids SAR = Sodium Adsorption Ratio mg/L = milligrams per liter μmhos/cm = micro ohms per centimeter -- = not measured

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TABLE 3 SURFACE WATER QUALITY RESULTS HEART RIVER, SOUTH BRANCH HEART RIVER, AND SOUTH TRIBUTARY SOUTH HEART PROJECT, NORTH DAKOTA SHUN-03 South Tributary Upstream Sampling Event 09/2006 10/2006 11/2006 12/2006 01/2007 02/2007 03/2007 04/2007 05/2007 06/2007 07/2007 08/2007 AVERAGE TDS TSS (mg/L) (mg/L) 326 979 ----315 330 248 405 223 296 390 1940 72 ----98 590 248 115 75 6 393 pH 9.2 7.0 ----7.2 7.0 7.0 6.5 7.2 8.1 7.4 Na Mg (mg/L) (mg/L) 82.1 74.6 ----82.8 69.6 97.5 90.9 66.2 109 84 1.3 0.7 ----2.2 0.7 0.5 0.8 0.5 0.5 0.9 Ca (mg/L) 5.6 1.8 ----11.2 2.3 3.3 1.7 2.4 1.2 3.7 Specific Conductance (μ mhos/cm) 402 387 ----403 335 478 402 309 484 400 SAR 8.1 12.0 ----5.9 10.3 13.2 14.4 10.2 21.1 10.2 Irrigation Classification C2 C2 ----C2 C2 C2 C2 C2 C2 C2 S2 S2 ----S1 S2 S2 S3 S2 S4 S2

SHUN-04 South Tributary Dowstream Sampling Event 09/2006 10/2006 11/2006 12/2006 01/2007 02/2007 03/2007 04/2007 05/2007 06/2007 07/2007 08/2007 AVERAGE TDS TSS (mg/L) (mg/L) 318 334 ----326 432 347 499 264 -360 960 39 ----414 1 2200 9 4 -518 pH 7.4 7.0 ----7.3 7.7 7.8 6.4 7.5 -7.3 Na Mg (mg/L) (mg/L) 98.4 97.7 ----94.4 133 110 152 73.6 -108 0.6 0.9 ----3.3 1.5 0.5 3.1 0.5 -1.5 Ca (mg/L) 3.1 6.8 ----23.4 15.3 1.5 19.0 5.5 -10.7 Specific Conductance (μ mhos/cm) 502 456 ----459 640 501 778 358 -528 SAR 13.4 9.3 ----4.8 8.7 19.9 8.5 8.1 -8.2 Irrigation Classification C2 C2 ----C2 C2 C2 C3 C2 -C2 S3 S2 ----S1 S2 S4 S2 S2 -S2

Notes: TDS = Total Dissolved Solids TSS = Total Suspended Solids SAR = Sodium Adsorption Ratio mg/L = milligrams per liter μmhos/cm = micro ohms per centimeter -- = not measured

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TABLE 4 MONITORING WELL AND STAFF GAGE LOCATIONS SOUTH HEART PROJECT, NORTH DAKOTA State Plane Easting (ft) 1364195.313 1364200.019 1370979.921 1370976.577 1370973.546 1362250.221 1362247.177 1362244.546 1365965.041 1365967.465 1365969.877 1376139.337 1376138.028 1376136.537 1364200.199 1370960.790 1362300.597 1365977.331 1376179.894 State Plane Northing (ft) 447703.425 447701.305 438175.047 438179.021 438181.982 434144.684 434139.442 434134.818 433181.738 433184.739 433187.945 448524.131 448528.313 448532.271 447753.449 438160.448 434125.971 433166.508 448539.238 Ground Surface Elevation (ft amsl) 2487.95 2487.83 2501.63 2501.76 2501.84 2518.15 2518.15 2518.25 2514.12 2514.40 2514.62 2461.84 2461.98 2461.66 2469.98 2495.69 2509.10 2511.68 2452.48 Measuring Point Elevation (ft amsl) 2490.61 2490.81 2504.34 2504.19 2504.56 2520.61 2520.33 2520.45 2516.77 2516.90 2517.13 2464.34 2464.28 2464.39 2469.98 2495.69 2509.10 2511.68 2452.48

Well ID

Township Range Section

QtrQtrQtr

SHMW-01A SHMW-01S SHMW-09A1 SHMW-09A2 SHMW-09S SHMW-11A1 SHMW-11A2 SHMW-11S SHMW-14A1 SHMW-14A2 SHMW-14S SHMW-15A1 SHMW-15A2 SHMW-15S SHSG-01 SHSG-09 SHSG-11 SHSG-14 SHSG-15

139N 139N 139N 139N 139N 139N 139N 139N 139N 139N 139N 139N 139N 139N 139N 139N 139N 139N 139N

98W 98W 98W 98W 98W 98W 98W 98W 98W 98W 98W 98W 98W 98W 98W 98W 98W 98W 98W

9 9 23 23 23 28 28 28 27 27 27 12 12 12 9 23 28 27 12

SE1/4,NE1/4,SE1/4 SE1/4,NE1/4,SE1/4 SW1/4,SE1/4,NW1/4 SW1/4,SE1/4,NW1/4 SW1/4,SE1/4,NW1/4 NE1/4,SW1/4,NE1/4 NE1/4,SW1/4,NE1/4 NE1/4,SW1/4,NE1/4 SW1/4,SE1/4,NW1/4 SW1/4,SE1/4,NW1/4 SW1/4,SE1/4,NW1/4 SE1/4,SW1/4,NW1/4 SE1/4,SW1/4,NW1/4 SE1/4,SW1/4,NW1/4 SE1/4,NE1/4,SE1/4 SW1/4,SE1/4,NW1/4 NE1/4,SW1/4,NE1/4 SW1/4,SE1/4,NW1/4 SE1/4,SW1/4,NW1/4

Notes: - Coordinates are in North Dakota StatePlane NAD27 - ft = feet - Measuring point elevation is top of the well casing. - Elevations are reported in feet above mean sea level (ft amsl)

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TABLE 5 MONITORING WELL CONSTRUCTION SUMMARY SOUTH HEART PROJECT, NORTH DAKOTA

Well

Well Casing Date Inner Installed Diameter (in)
05/07/2007 05/07/2007 05/03/2007 05/02/2007 05/02/2007 05/02/2007 05/01/2007 05/01/2007 05/05/2007 05/05/2007 05/04/2007 05/04/2007 05/03/2007 05/03/2007

Elevation Geologic Unit Screened Borehole TD (ft bgs)
18.10 27.00 18.00 24.00 30.20 18.00 24.00 30.50 17.00 29.00 40.00 14.10 23.70 33.70

Screened Interval From (ft bgs)
12.90 23.80 12.90 20.70 27.50 13.00 18.90 29.40 12.00 24.00 34.90 9.00 18.60 28.60

Sand Pack Interval To (ft amsl)
2470.25 2461.03 2483.93 2478.06 2472.34 2500.35 2494.55 2487.95 2497.32 2485.60 2474.82 2448.04 2438.58 2428.36

Borehole Diameter (in)
7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5

Measured Well TD (ft btoc)
20.30 29.36 20.65 26.19 32.27 20.15 26.62 31.96 19.70 31.51 41.89 16.23 26.10 36.15

Ground (ft amsl)
2487.95 2487.83 2501.63 2501.76 2501.84 2518.15 2518.15 2518.25 2514.12 2514.40 2514.62 2461.84 2461.98 2461.66

TOC (ft amsl)
2490.61 2490.81 2504.34 2504.19 2504.56 2520.61 2520.33 2520.45 2516.77 2516.90 2517.13 2464.34 2464.28 2464.39

To (ft bgs)
17.70 26.80 17.70 23.70 29.50 17.80 23.60 30.30 16.80 28.80 39.80 13.80 23.40 33.30

From (ft amsl)
2475.05 2464.03 2488.73 2481.06 2474.34 2505.15 2499.25 2488.85 2502.12 2490.40 2479.72 2452.84 2443.38 2433.06

From (ft bgs)
11.00 22.30 10.90 19.30 26.20 10.70 16.80 27.00 9.20 21.30 31.90 6.80 16.70 25.90

To (ft bgs)
18.10 27.00 18.00 23.80 29.70 18.00 24.00 30.50 17.00 29.00 40.00 14.10 23.70 33.70

From (ft amsl)
2476.95 2465.53 2490.73 2482.46 2475.64 2507.45 2501.35 2491.25 2504.92 2493.10 2482.72 2455.04 2445.28 2435.76

To (ft amsl)
2469.85 2460.83 2483.63 2477.96 2472.14 2500.15 2494.15 2487.75 2497.12 2485.40 2474.62 2447.74 2438.28 2427.96

SHMW-01A SHMW-01S SHMW-09A1 SHMW-09A2 SHMW-09S SHMW-11A1 SHMW-11A2 SHMW-11S SHMW-14A1 SHMW-14A2 SHMW-14S SHMW-15A1 SHMW-15A2 SHMW-15S

2 2 2 2 2 2 2 2 2 2 2 2 2 2

alluvium D Coal alluvium alluvium Clst, Sltst, D Coal alluvium alluvium Ss, D Coal alluvium alluvium Sand, Clst, D Coal, Sltst alluvium Clst, Ss Clst, D Coal
- Clst = claystone - Sltst = siltstone - Ss = sandstone

Notes: - TD = total depth - ft bgs = feet below ground surface - in = inches - ft btoc = feet below top of casing - ft amsl = feet above mean sea level

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TABLE 6 WATER LEVELS IN MONITORING WELLS AND STAFF GAGES ALONG STREAM CHANNELS SOUTH HEART PROJECT, NORTH DAKOTA DTW (ft bmp) 16.23 16.26 16.53 16.59 16.64 16.67 16.53 15.01 15.12 15.45 15.54 15.65 15.63 15.62 -1.64 -1.77 -1.80 -2.07 -2.07 Elev (ft msl) 2474.38 2474.35 2474.08 2474.02 2473.97 2473.94 2474.08 2475.80 2475.69 2475.36 2475.27 2475.16 2475.18 2475.19 2471.62 2471.75 2471.78 2472.05 2472.05

Location

Monthly Event May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 July 2007 August 2007 September 2007 October 2007 November 2007

Date/Time 05/15/07 17:52 06/19/07 12:29 07/26/07 07:00 08/20/07 17:24 09/11/07 08:16 10/26/07 14:16 11/05/07 11:55 05/15/07 17:54 06/19/07 12:31 07/26/07 06:58 08/20/07 17:26 09/11/07 08:15 10/26/07 14:18 11/05/07 11:57 07/26/07 07:09 08/20/07 17:20 09/11/07 08:21 10/26/07 14:17 11/05/07 11:54

SHMW-01A

SHMW-01S

SHSG-01

Notes: -SHMW indicates South Heart Monitoring Well installed as part of baseline investigations -SHSG indicates South Heart Staff Gage insatlled as part of the baseline investigation -DTW is depth to water -ft bmp is feet below measuring point -Monitoring wells are measured from the top of the well casing -Staff gages are measured from the bottom of the channel -Negative values indicate water level is above the measuring point

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TABLE 6 WATER LEVELS IN MONITORING WELLS AND STAFF GAGES ALONG STREAM CHANNELS SOUTH HEART PROJECT, NORTH DAKOTA DTW (ft bmp) 20.68 20.13 19.67 19.62 19.77 19.91 19.94 18.91 18.40 18.74 19.40 19.70 19.91 19.69 18.93 19.80 19.00 19.28 19.69 20.67 20.43 -1.85 -0.71 -1.92 -1.00 -0.95 Elev (ft msl) 2483.66 2484.21 2484.67 2484.72 2484.57 2484.43 2484.40 2485.28 2485.79 2485.45 2484.79 2484.49 2484.28 2484.50 2485.63 2484.76 2485.56 2485.28 2484.87 2483.89 2484.13 2497.54 2496.40 2497.61 2496.69 2496.64

Location

Monthly Event May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 July 2007 August 2007 September 2007 October 2007 November 2007

Date/Time 05/15/07 14:55 06/19/07 14:57 07/26/07 11:10 08/20/07 19:53 09/11/07 11:09 10/26/07 11:43 11/05/07 14:51 05/15/07 14:55 06/19/07 15:00 07/26/07 11:12 08/20/07 19:56 09/11/07 11:11 10/26/07 11:41 11/05/07 14:49 05/15/07 14:55 06/19/07 15:09 07/26/07 11:14 08/20/07 19:58 09/11/07 11:13 10/26/07 11:39 11/05/07 14:48 07/26/07 11:10 08/20/07 19:52 09/11/07 11:17 10/26/07 11:44 11/05/07 14:50

SHMW-09A1

SHMW-09A2

SHMW-09S

SHSG-09

Notes: -SHMW indicates South Heart Monitoring Well installed as part of baseline investigations -SHSG indicates South Heart Staff Gage insatlled as part of the baseline investigation -DTW is depth to water -ft bmp is feet below measuring point -Monitoring wells are measured from the top of the well casing -Staff gages are measured from the bottom of the channel -Negative values indicate water level is above the measuring point

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TABLE 6 WATER LEVELS IN MONITORING WELLS AND STAFF GAGES ALONG STREAM CHANNELS SOUTH HEART PROJECT, NORTH DAKOTA DTW (ft bmp) 13.79 13.42 14.09 14.46 14.62 14.73 14.74 13.57 13.19 13.83 14.16 14.37 14.48 14.49 13.59 13.32 13.94 14.29 14.48 14.60 14.62 -1.34 -0.80 -1.38 -0.57 -0.48 Elev (ft msl) 2506.82 2507.19 2506.52 2506.15 2505.99 2505.88 2505.87 2506.76 2507.14 2506.50 2506.17 2505.96 2505.85 2505.84 2506.86 2507.13 2506.51 2506.16 2505.97 2505.85 2505.83 2510.44 2509.90 2510.48 2509.67 2509.58

Location

Monthly Event May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 July 2007 August 2007 September 2007 October 2007 November 2007

Date/Time 05/15/07 13:50 06/19/07 14:23 07/26/07 09:18 08/20/07 18:58 09/11/07 09:54 10/26/07 12:21 11/05/07 13:51 05/15/07 13:48 06/19/07 14:28 07/26/07 09:19 08/20/07 18:57 09/11/07 09:53 10/26/07 12:20 11/05/07 13:48 05/15/07 13:52 06/19/07 14:36 07/26/07 09:22 08/20/07 18:55 09/11/07 09:52 10/26/07 12:19 11/05/07 13:44 07/26/07 09:22 08/20/07 18:59 09/11/07 10:07 10/26/07 12:18 11/05/07 13:56

SHMW-11A1

SHMW-11A2

SHMW-11S

SHSG-11

Notes: -SHMW indicates South Heart Monitoring Well installed as part of baseline investigations -SHSG indicates South Heart Staff Gage insatlled as part of the baseline investigation -DTW is depth to water -ft bmp is feet below measuring point -Monitoring wells are measured from the top of the well casing -Staff gages are measured from the bottom of the channel -Negative values indicate water level is above the measuring point

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TABLE 6 WATER LEVELS IN MONITORING WELLS AND STAFF GAGES ALONG STREAM CHANNELS SOUTH HEART PROJECT, NORTH DAKOTA DTW (ft bmp) 9.59 9.35 10.09 10.49 10.80 10.99 11.01 9.81 9.56 10.23 10.65 10.94 11.15 11.15 9.99 9.83 10.49 10.90 11.20 11.39 11.40 -0.73 -0.32 -0.99 0.00 0.00 Elev (ft msl) 2507.18 2507.42 2506.68 2506.28 2505.97 2505.78 2505.76 2507.09 2507.34 2506.67 2506.25 2505.96 2505.75 2505.75 2507.14 2507.30 2506.64 2506.23 2505.93 2505.74 2505.73 2512.41 2512.00 2512.67 2511.68 2511.68

Location

Monthly Event May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 July 2007 August 2007 September 2007 October 2007 November 2007

Date/Time 05/15/07 14:21 06/19/07 10:48 07/26/07 09:46 08/20/07 19:13 09/11/07 10:17 10/26/07 11:59 11/05/07 14:03 05/15/07 14:24 06/19/07 10:56 07/26/07 09:47 08/20/07 19:14 09/11/07 10:19 10/26/07 12:01 11/05/07 14:01 05/15/07 14:27 06/19/07 11:00 07/26/07 09:48 08/20/07 19:15 09/11/07 10:16 10/26/07 12:04 11/05/07 13:59 07/26/07 10:42 08/20/07 19:18 09/11/07 10:21 10/26/07 12:04 11/05/07 14:01

SHMW-14A1

SHMW-14A2

SHMW-14S

SHSG-14

Notes: -SHMW indicates South Heart Monitoring Well installed as part of baseline investigations -SHSG indicates South Heart Staff Gage insatlled as part of the baseline investigation -DTW is depth to water -ft bmp is feet below measuring point -Monitoring wells are measured from the top of the well casing -Staff gages are measured from the bottom of the channel -Negative values indicate water level is above the measuring point

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TABLE 6 WATER LEVELS IN MONITORING WELLS AND STAFF GAGES ALONG STREAM CHANNELS SOUTH HEART PROJECT, NORTH DAKOTA DTW (ft bmp) 8.96 10.05 10.84 11.26 11.14 10.98 10.91 10.63 10.21 9.59 9.61 9.54 9.34 9.30 1.64 1.70 2.18 2.07 2.05 2.03 2.14 -1.03 -0.87 -1.07 -0.84 -0.82 Elev (ft msl) 2455.38 2454.29 2453.50 2453.08 2453.20 2453.36 2453.43 2453.65 2454.07 2454.69 2454.67 2454.74 2454.94 2454.98 2462.75 2462.69 2462.21 2462.32 2462.34 2462.36 2462.25 2453.51 2453.35 2453.55 2453.32 2453.30

Location

Monthly Event May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 May 2007 June 2007 July 2007 August 2007 September 2007 October 2007 November 2007 July 2007 August 2007 September 2007 October 2007 November 2007

Date/Time 05/15/07 11:40 06/19/07 16:16 07/26/07 11:50 08/20/07 20:32 09/11/07 11:46 10/26/07 07:44 11/05/07 15:12 05/15/07 11:45 06/19/07 16:21 07/26/07 11:51 08/20/07 20:35 09/11/07 11:47 10/26/07 07:42 11/05/07 15:14 05/15/07 11:48 06/19/07 16:26 07/26/07 11:53 08/20/07 20:37 09/11/07 11:48 10/26/07 07:41 11/05/07 15:16 07/26/07 11:54 08/20/07 20:31 09/11/07 11:46 10/26/07 07:45 11/05/07 15:19

SHMW-15A1

SHMW-15A2

SHMW-15S

SHSG-15

Notes: -SHMW indicates South Heart Monitoring Well installed as part of baseline investigations -SHSG indicates South Heart Staff Gage insatlled as part of the baseline investigation -DTW is depth to water -ft bmp is feet below measuring point -Monitoring wells are measured from the top of the well casing -Staff gages are measured from the bottom of the channel -Negative values indicate water level is above the measuring point

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APPENDIX A

STREAM CHANNEL CROSS SECTIONS

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APPENDIX A INTRODUCTION Geomorphology Cross Sections Stream channel cross sections were surveyed in the field and derived from a high-resolution digital elevation model to further identify and characterize the channel morphology. The locations of the cross sections are shown on Figure 3 of the report. The cross sections and details of the locations are shown on Figures A-1 to A-13 of this appendix. Table A-1 provides a summary of the dimensions of the geomorphic features. Major channel morphology features are identified on the cross sections. The shorter cross sections, measured in the field, were prepared to identify near-channel features, such as bankfull stage and active floodplains. The longer sections were derived from a high-resolution digital elevation model (DEM) with 2.5-foot vertical accuracy and 15-foot grid cell size. The cross sections from the DEM were prepared to identify broader scale features such as terraces across the valley.

66

67

68

69

L E G E N D
2520 2560

Cross Sections are presented on Figure A-10. All Cross Sections face downstream.
0 252

00 26
80 25

Geomorphology Cross Section (Field Survey) Geomorphology Cross Section (DEM) Alluvial Valley Floor Study Area Potential Alluvial Valley Floor, OSM 1985 Permit Boundary Unconsolidated Deposits Qal: Modern Deposit Qoa: Older Deposit 26 I J

31

2520

31

27

G-H E D
2560 2560

F
430

C B A

A`
430

A2’ A2 A1
2540

A1’

2560

256 0
40 25

R E F E R E N C E
Geomorphology Cross Section (Field Survey): measured during 2007 field investigation. Geomorphology Cross Section (DEM): measured from 2006 digital elevation model, 2.5-foot vertical accuracy, 15-foot horizontal cell size. Unconsolidated Deposits: Golder, 2006-2007. Potential Alluvial Valley Floor Data: OSM, Reconnaissance Map of Potential Alluvial Valley Floors, Dickinson Area, West-Central North Dakota, 1985. Mine Permit Boundary: Norwest, 12/13/2007. PLSS: ND HUB. USGS 7.5’ Topographic Quadrangles drawn from TOPO!: Belfield SE, South Heart. Projection: StatePlane, North Dakota South, NAD27, Feet.
PROJECT

2540

A

29

34 35

29

SOUTH HEART COAL LLC SOUTH HEART PROJECT SOUTH HEART, NORTH DAKOTA
TITLE

40 25

400
428 000N

200

0

400 FEET

0 258

GEOMORPHOLOGY STUDY AREA SA-01
28
PROJECT NO. DESIGN GIS AJR AJR ANH RLK 063-2212 10/26/2007 02/27/2008 02/28/2008 02/29/2008 FILEAVF_CrossSections_11x17.mxd SCALE AS SHOWN REV. 2

SCALE 1:4,800 1 IN. EQUALS 400 FT. IF PRINTED AT 11INX17IN
1366000 E

67

68

69

CHECK

Denver, Colorado

FIG A-1

REVIEW

64

65

66

67

L E G E N D
35

Cross Sections are presented on Figure A-10. All Cross Sections face downstream.

35

Geomorphology Cross Section (Field Survey) Geomorphology Cross Section (DEM) Alluvial Valley Floor Study Area Potential Alluvial Valley Floor, OSM 1985

C3

C3’ C2’ C1’ C2 C1

Permit Boundary Unconsolidated Deposits Qal: Modern Deposit Qoa: Older Deposit

C’

I

J

34

34

G-H E D

B’
20 25

F

C B A

B2’ B1’ 28
20 25

27 B2

B1

R E F E R E N C E
33

33

B

2560
25 60
2560

Geomorphology Cross Section (Field Survey): measured during 2007 field investigation. Geomorphology Cross Section (DEM): measured from 2006 digital elevation model, 2.5-foot vertical accuracy, 15-foot horizontal cell size. Unconsolidated Deposits: Golder, 2006-2007. Potential Alluvial Valley Floor Data: OSM, Reconnaissance Map of Potential Alluvial Valley Floors, Dickinson Area, West-Central North Dakota, 1985. Mine Permit Boundary: Norwest, 12/13/2007. PLSS: ND HUB. USGS 7.5’ Topographic Quadrangles drawn from TOPO!: Belfield SE, South Heart. Projection: StatePlane, North Dakota South, NAD27, Feet.
PROJECT

20 25

432 000N

32

SOUTH HEART COAL LLC SOUTH HEART PROJECT SOUTH HEART, NORTH DAKOTA
TITLE

400
2580

200

0
20 25

40025 40 FEET

GEOMORPHOLOGY STUDY AREA SA-02
PROJECT NO. DESIGN GIS AJR AJR ANH RLK 063-2212 10/26/2007 02/27/2008 02/28/2008 02/29/2008 FILEAVF_CrossSections_11x17.mxd SCALE AS SHOWN REV. 2

SCALE 1:4,800 1 IN. EQUALS 400 FT. IF PRINTED AT 11INX17IN
1364000 E

65

66

67

CHECK

Denver, Colorado

FIG A-2

REVIEW

64

65

66

67

68

L E G E N D
Geomorphology Cross Section (Field Survey) Geomorphology Cross Section (DEM) Alluvial Valley Floor Study Area Potential Alluvial Valley Floor, OSM 1985 Permit Boundary Unconsolidated Deposits Qal: Modern Deposit
25 20
36

Cross Sections are presented on Figure A-11. All Cross Sections face downstream.

40 25

0 250
0 254

25 20

21
36

22

Qoa: Older Deposit

2560
2500

I

J

2500

C
2500

G-H E D F C B A

35

35

C3

C3’ C2’ C1’ C2 C1

R E F E R E N C E
Geomorphology Cross Section (Field Survey): measured during 2007 field investigation. Geomorphology Cross Section (DEM): measured from 2006 digital elevation model, 2.5-foot vertical accuracy, 15-foot horizontal cell size. Unconsolidated Deposits: Golder, 2006-2007. Potential Alluvial Valley Floor Data: OSM, Reconnaissance Map of Potential Alluvial Valley Floors, Dickinson Area, West-Central North Dakota, 1985. Mine Permit Boundary: Norwest, 12/13/2007. PLSS: ND HUB. USGS 7.5’ Topographic Quadrangles drawn from TOPO!: Belfield SE, South Heart. Projection: StatePlane, North Dakota South, NAD27, Feet.
PROJECT

28 27
34

C’
2540
34

B’

2520

20 25

B2’ B1’
TITLE

SOUTH HEART COAL LLC SOUTH HEART PROJECT SOUTH HEART, NORTH DAKOTA

B2
433 000N

B1

400

200

0

400 FEET
2580

GEOMORPHOLOGY STUDY AREA SA-03
33
PROJECT NO. DESIGN GIS CHECK AJR AJR ANH RLK 063-2212 10/26/2007 02/27/2008 02/28/2008 02/29/2008 FILEAVF_CrossSections_11x17.mxd SCALE AS SHOWN REV. 2

0 256

SCALE 1:4,800 1 IN. EQUALS 400 FT. IF PRINTED AT 11INX17IN
1364000 E

B

65

66

67

68

Denver, Colorado

FIG A-3

REVIEW

68

69

1370

71

72

440

Cross Sections are presented on Figure A-11. All Cross Sections face downstream. E3 E2 E1
2500

250 0

L E G E N D
E3’ E2’ E1’
0 252
440

Geomorphology Cross Section (Field Survey) Geomorphology Cross Section (DEM) Alluvial Valley Floor Study Area Potential Alluvial Valley Floor, OSM 1985 Permit Boundary Unconsolidated Deposits Qal: Modern Deposit Qoa: Older Deposit

00 25

2520

I

J

2500

G-H
39

39

E D F C B A

2500

25 00

D 23 22
2500
2500

D’

D1 D2 D3 D3’
38

R E F E R E N C E
Geomorphology Cross Section (Field Survey): measured during 2007 field investigation. Geomorphology Cross Section (DEM): measured from 2006 digital elevation model, 2.5-foot vertical accuracy, 15-foot horizontal cell size. Unconsolidated Deposits: Golder, 2006-2007. Potential Alluvial Valley Floor Data: OSM, Reconnaissance Map of Potential Alluvial Valley Floors, Dickinson Area, West-Central North Dakota, 1985. Mine Permit Boundary: Norwest, 12/13/2007. PLSS: ND HUB. USGS 7.5’ Topographic Quadrangles drawn from TOPO!: Belfield SE, South Heart. Projection: StatePlane, North Dakota South, NAD27, Feet.
PROJECT

0 250
38

D1’ D2’

25 00

2500

2500

2500

00 25

2500

2500

37

2500

SOUTH HEART COAL LLC SOUTH HEART PROJECT SOUTH HEART, NORTH DAKOTA
TITLE

437 000N

00 25

400
250 0

200

0

400 FEET

GEOMORPHOLOGY STUDY AREA SA-04
PROJECT NO. DESIGN GIS AJR AJR ANH RLK 063-2212 10/26/2007 02/27/2008 02/28/2008 02/29/2008 FILEAVF_CrossSections_11x17.mxd SCALE AS SHOWN REV. 2

SCALE 1:4,800 1 IN. EQUALS 400 FT. IF PRINTED AT 11INX17IN
1368000 E

69

1370

71

72

CHECK

Denver, Colorado

FIG A-4

REVIEW

69 42

1370

71

72

73 42

L E G E N D
Geomorphology Cross Section (Field Survey) Geomorphology Cross Section (DEM) Alluvial Valley Floor Study Area Potential Alluvial Valley Floor, OSM 1985

Cross Sections are presented on Figure A-11. All Cross Sections face downstream.

25 00

Permit Boundary Unconsolidated Deposits Qal: Modern Deposit Qoa: Older Deposit

80 24

15

14

2480

2500

2480
41

I
41

J

2480

G-H
2500
00 25

E D F
2480

C B A

E

440

E3 E2 E1

E3’ E2’ E1’ E’
2520

440

R E F E R E N C E
Geomorphology Cross Section (Field Survey): measured during 2007 field investigation. Geomorphology Cross Section (DEM): measured from 2006 digital elevation model, 2.5-foot vertical accuracy, 15-foot horizontal cell size. Unconsolidated Deposits: Golder, 2006-2007. Potential Alluvial Valley Floor Data: OSM, Reconnaissance Map of Potential Alluvial Valley Floors, Dickinson Area, West-Central North Dakota, 1985. Mine Permit Boundary: Norwest, 12/13/2007. PLSS: ND HUB. USGS 7.5’ Topographic Quadrangles drawn from TOPO!: Belfield SE, South Heart. Projection: StatePlane, North Dakota South, NAD27, Feet.
PROJECT

2500

0 250

22

23

2520

2500

439 000N

39

25 00

SOUTH HEART COAL LLC SOUTH HEART PROJECT SOUTH HEART, NORTH DAKOTA
TITLE

2500

D D’

400

200

0

400 FEET

GEOMORPHOLOGY STUDY AREA SA-05
PROJECT NO. DESIGN GIS AJR AJR ANH RLK 063-2212 10/26/2007 02/27/2008 02/28/2008 02/29/2008 FILEAVF_CrossSections_11x17.mxd SCALE AS SHOWN REV. 2

SCALE 1:4,800 1 IN. EQUALS 400 FT. IF PRINTED AT 11INX17IN
72 73

1369000 E

1370

71

CHECK

Denver, Colorado

FIG A-5

REVIEW

59

1360

61

62

63

L E G E N D
Cross Sections are presented on Figure A-12. 21 All Cross Sections face downstream.
80 25

Geomorphology Cross Section (Field Survey) Geomorphology Cross Section (DEM) Alluvial Valley Floor Study Area Potential Alluvial Valley Floor, OSM 1985 Permit Boundary Unconsolidated Deposits Qal: Modern Deposit Qoa: Older Deposit

60 25

F
35 35

I

J

40 25

G-H E D F C B A
2520

34

34

28
25 20
25 20

F1 F1’

R E F E R E N C E
Geomorphology Cross Section (Field Survey): measured during 2007 field investigation. Geomorphology Cross Section (DEM): measured from 2006 digital elevation model, 2.5-foot vertical accuracy, 15-foot horizontal cell size. Unconsolidated Deposits: Golder, 2006-2007. Potential Alluvial Valley Floor Data: OSM, Reconnaissance Map of Potential Alluvial Valley Floors, Dickinson Area, West-Central North Dakota, 1985. Mine Permit Boundary: Norwest, 12/13/2007. PLSS: ND HUB. USGS 7.5’ Topographic Quadrangles drawn from TOPO!: Belfield SE, South Heart. Projection: StatePlane, North Dakota South, NAD27, Feet.
PROJECT

2520

F’
2520

433 000N

33

SOUTH HEART COAL LLC SOUTH HEART PROJECT SOUTH HEART, NORTH DAKOTA
TITLE

2520

2540

400

200

0

SCALE 1:4,800 1 IN. EQUALS 400 FT. IF PRINTED AT 11INX17IN
1359000 E 1360

25 60

400 FEET

GEOMORPHOLOGY STUDY AREA SA-06
PROJECT NO. DESIGN GIS AJR AJR ANH RLK 063-2212 10/26/2007 02/27/2008 02/28/2008 02/29/2008 FILEAVF_CrossSections_11x17.mxd SCALE AS SHOWN REV. 2

61

62

63

CHECK

Denver, Colorado

FIG A-6

REVIEW

72

73

74

75

76

L E G E N D
44

0 248

44

252 0

Cross Sections are presented on Figure A-12. All Cross Sections face downstream.

Geomorphology Cross Section (Field Survey) Geomorphology Cross Section (DEM) Alluvial Valley Floor Study Area Potential Alluvial Valley Floor, OSM 1985 Permit Boundary Unconsolidated Deposits Qal: Modern Deposit

2480

H

Qoa: Older Deposit

2480

I
24 80

J

24 80

2500
43

24 80

248 0

43

G-H E D F C B A

80 24

14
80 2480 24

13

24 80
2480

R E F E R E N C E
42

42

H1
00 25

H1’ G1
441 000N

H’

24 80

Geomorphology Cross Section (Field Survey): measured during 2007 field investigation. Geomorphology Cross Section (DEM): measured from 2006 digital elevation model, 2.5-foot vertical accuracy, 15-foot horizontal cell size. Unconsolidated Deposits: Golder, 2006-2007. Potential Alluvial Valley Floor Data: OSM, Reconnaissance Map of Potential Alluvial Valley Floors, Dickinson Area, West-Central North Dakota, 1985. Mine Permit Boundary: Norwest, 12/13/2007. PLSS: ND HUB. USGS 7.5’ Topographic Quadrangles drawn from TOPO!: Belfield SE, South Heart. Projection: StatePlane, North Dakota South, NAD27, Feet.
PROJECT

2480

G1’
252 0

41

SOUTH HEART COAL LLC SOUTH HEART PROJECT SOUTH HEART, NORTH DAKOTA
TITLE

2500

400
0 248

200

0

400 FEET

GEOMORPHOLOGY STUDY AREA SA-07 AND SA-08
PROJECT NO. DESIGN GIS CHECK AJR AJR ANH RLK 063-2212 10/26/2007 02/27/2008 02/28/2008 02/29/2008 FILEAVF_CrossSections_11x17.mxd SCALE AS SHOWN REV. 2

23
1372000 E

SCALE 1:4,800 1 IN. EQUALS 400 FT. IF PRINTED AT 11INX17IN 24
75 76

73

74

Denver, Colorado

FIG A-7

REVIEW

57 52

58

59

1360

61 52

L E G E N D
Geomorphology Cross Section (Field Survey) Geomorphology Cross Section (DEM)

Cross Sections are presented on Figure A-13. All Cross Sections face downstream.

5 4

Alluvial Valley Floor Study Area Potential Alluvial Valley Floor, OSM 1985 Permit Boundary Unconsolidated Deposits Qal: Modern Deposit Qoa: Older Deposit

20 25

I

250 0
2520

I
51

2500

51

J

250 0

2520

250 0

G-H
2520

E D F C B A

450

450

R E F E R E N C E
Geomorphology Cross Section (Field Survey): measured during 2007 field investigation. Geomorphology Cross Section (DEM): measured from 2006 digital elevation model, 2.5-foot vertical accuracy, 15-foot horizontal cell size. Unconsolidated Deposits: Golder, 2006-2007. Potential Alluvial Valley Floor Data: OSM, Reconnaissance Map of Potential Alluvial Valley Floors, Dickinson Area, West-Central North Dakota, 1985. Mine Permit Boundary: Norwest, 12/13/2007. PLSS: ND HUB. USGS 7.5’ Topographic Quadrangles drawn from TOPO!: Belfield SE, South Heart. Projection: StatePlane, North Dakota South, NAD27, Feet.
PROJECT

8

9
24 80
2480

24 80

80 24

250 0

2480

24 80

252 0
449 000N

I1 I’
2500

I2

80 24
49

I1’

I2’

SOUTH HEART COAL LLC SOUTH HEART PROJECT SOUTH HEART, NORTH DAKOTA
TITLE

400

200

0

400 FEET

GEOMORPHOLOGY STUDY AREA SA-09
PROJECT NO. DESIGN GIS AJR AJR ANH RLK 063-2212 10/26/2007 02/27/2008 02/28/2008 02/29/2008 FILEAVF_CrossSections_11x17.mxd SCALE AS SHOWN REV. 2

1357000 E

40 25
58 59

SCALE 1:4,800 1 IN. EQUALS 400 FT. IF PRINTED AT 11INX17IN
1360

61

CHECK

Denver, Colorado

FIG A-8

REVIEW

61

62

63

64

65

L E G E N D
Geomorphology Cross Section (Field Survey) Geomorphology Cross Section (DEM) Alluvial Valley Floor Study Area Potential Alluvial Valley Floor, OSM 1985

2520

Cross Sections are presented on Figure A-13. All Cross Sections face downstream.

2500

J
2500

Permit Boundary Unconsolidated Deposits Qal: Modern Deposit Qoa: Older Deposit

450

450

I

J

G-H
2480
0 248

E D F C B A

2480

24 80

2480
49

9

10

49

R E F E R E N C E
Geomorphology Cross Section (Field Survey): measured during 2007 field investigation. Geomorphology Cross Section (DEM): measured from 2006 digital elevation model, 2.5-foot vertical accuracy, 15-foot horizontal cell size. Unconsolidated Deposits: Golder, 2006-2007. Potential Alluvial Valley Floor Data: OSM, Reconnaissance Map of Potential Alluvial Valley Floors, Dickinson Area, West-Central North Dakota, 1985. Mine Permit Boundary: Norwest, 12/13/2007. PLSS: ND HUB. USGS 7.5’ Topographic Quadrangles drawn from TOPO!: Belfield SE, South Heart. Projection: StatePlane, North Dakota South, NAD27, Feet.
PROJECT

2500

J2 J1 J2’ J1’
24 80
448 000N

48

SOUTH HEART COAL LLC SOUTH HEART PROJECT SOUTH HEART, NORTH DAKOTA

J’

TITLE

20 25

400

200

0

400 25 00 FEET

GEOMORPHOLOGY STUDY AREA SA-10
PROJECT NO. DESIGN GIS AJR AJR ANH RLK 063-2212 10/26/2007 02/27/2008 02/28/2008 02/29/2008 FILEAVF_CrossSections_11x17.mxd SCALE AS SHOWN REV. 2

25 40
1361000 E

SCALE 1:4,800 1 IN. EQUALS 400 FT. IF PRINTED AT 11INX17IN
62 63 64 65

CHECK

Denver, Colorado

FIG A-9

REVIEW

TABLE A-1 DIMENSIONS OF GEOMORPHIC FEATURES SOUTH HEART PROJECT, NORTH DAKOTA Geomorp Cross hology Stream Section Study Channel ID Area A-A' SA-01 South Tributary SA-02 A1-A1' A2-A2' B-B' B1-B1' B2-B2' C-C' SA-03 C1-C1' C2-C2' C3-C3' D-D' SA-04 South Branch Heart River D1-D1' D2-D2' D3-D3' E-E' SA-05 E1-E1' E2-E2' E3-E3' SA-06 SA-07 SA-08 F-F' F1-F1' G1-G1' H-H' H1-H1' I-I' SA-09 Heart River SA-10 I1-I1' I2-I2' J-J' J1-J1' J2-J2' Bankfull Width (feet) Left Bank -11 10 -8 8 -4 5 4 -5 7 5 -14 6 2 -13 15 -19 -9 15 -9 3 Right Bank -25 16 -7 1 -12 9 12 -11 10 6 -7 8 12 -9 5 -7 -9 5 -11 33 Total -35 26 -15 9 -16 14 16 -16 17 11 -21 13 14 -21 21 -25 -18 21 -20 36 Active Floodplain Width (feet) Left Bank 76 106 97 30 67 94 ------------65 77 ---------Right Bank 86 56 43 104 15 40 ------------74 59 ---------Total 162 162 139 134 81 134 ------------139 136 ---------Flood Channel Width (feet) Left Bank ------34 ---30 ---46 ------59 -30 --17 --Right Bank ------30 ---60 ---76 ------22 -32 --22 --Total (ft) ------64 ---90 ---122 ------81 -62 --39 --First Terrace Width (feet) Left Bank 308 --680 --1840 ---1082 ---1705 ---292 --2300 -1298 --1365 --Right Bank 854 --111 --51 ---886 ---46 ---246 --44 -30 --34 --Total 1162 --791 --1890 ---1968 ---1751 ---538 --2344 -1328 --1398 --Left Bank 964 --1282 --------------1526 ----------Second Terrace Width (feet) Right Bank 854 --918 --------------246 -------------------Total 1818 --2201 --------------1772

Depth (feet) -4 4 -1 3 -3 4 3 -2 3 3 -3 3 2 -4 4 -3 -4 4 -5 4

Depth to Bankfull (feet) 7 9 9 5 5 4 ------------8 12 ----------

Depth to Bankfull (feet) ------5 ---12 ---17 ------9 -9 --5 ---

Notes: - Cross sections indentified by letter only are from a digital elevation model. Sub-cross sections indentified by letter and number are from field surveys.

July 2008
J:\06JOBS\063-2212 - S Heart Mine Permit\AVF Study\AVF Report\AVF_Study_Rev4\Tables\0632212 SH_AVF_rev03_RPT-FNL-TBLS_20MAY08tbl A-1_rev03_GeomorphDim

Golder Associates

063-2212

APPENDIX B

REPRESENTATIVE PHOTOGRAPHS

July 2008

Golder Associates

063-2212

I:\06\2212\0400\AlluVallFlrStudy-Rev4 14JUL08\0632212_SH_AVF_rev04_RPT-FNL_14JUL08.doc

ALLUVIAL VALLEY FLOOR STUDY SOUTH HEART PROJECT STARK COUNTY, ND PHOTO NO. 1

GEOMORPHOLOGY SITE SA3 – SOUTH BRANCH HEART RIVER DOWNSTREAM FROM FIRST TRANSECT

ALLUVIAL VALLEY FLOOR STUDY SOUTH HEART PROJECT STARK COUNTY, ND PHOTO NO. 2

GEOMORPHOLOGY SITE SA3 – SOUTH BRANCH HEART RIVER UPSTREAM FROM THIRD TRANSECT

ALLUVIAL VALLEY FLOOR STUDY SOUTH HEART PROJECT STARK COUNTY, ND PHOTO NO. 3

SE1/4 NE ¼ SECTION 22 – SOUTH BRANCH HEART RIVER LOOKING DOWNSTREAM TO EAST

July 2008

Golder Associates

063-2212

I:\06\2212\0400\AlluVallFlrStudy-Rev4 14JUL08\0632212_SH_AVF_rev04_RPT-FNL-App-B_14JUL08.doc

ALLUVIAL VALLEY FLOOR STUDY SOUTH HEART PROJECT STARK COUNTY, ND PHOTO NO. 4

GEOMORPHOLOGY SITE SA5 – SOUTH BRANCH HEART RIVER DARK ORGANIC CLAY IN CHANNEL BED

ALLUVIAL VALLEY FLOOR STUDY SOUTH HEART PROJECT STARK COUNTY, ND PHOTO NO. 5

GEOMORPHOLOGY SITE SA5 – SOUTH BRANCH HEART RIVER ROLLED SILTY CLAY FROM CHANNEL BED

ALLUVIAL VALLEY FLOOR STUDY SOUTH HEART PROJECT STARK COUNTY, ND PHOTO NO. 6

GAGING STATION SHSB-03 – SOUTH BRANCH HEART RIVER LOOKING UPSTREAM TO WEST

July 2008

Golder Associates

063-2212

I:\06\2212\0400\AlluVallFlrStudy-Rev4 14JUL08\0632212_SH_AVF_rev04_RPT-FNL-App-B_14JUL08.doc

ALLUVIAL VALLEY FLOOR STUDY SOUTH HEART PROJECT STARK COUNTY, ND PHOTO NO. 7

SHUN-01 WEST TRIBUTARY TO THE SOUTH BRANCH HEART RIVER LOOKING UPSTREAM TO WEST

July 2008

Golder Associates

063-2212

I:\06\2212\0400\AlluVallFlrStudy-Rev4 14JUL08\0632212_SH_AVF_rev04_RPT-FNL-App-B_14JUL08.doc

APPENDIX C

BORING LOGS

July 2008

Golder Associates

063-2212

I:\06\2212\0400\AlluVallFlrStudy-Rev4 14JUL08\0632212_SH_AVF_rev04_RPT-FNL_14JUL08.doc

2 2

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Lithologic Log Notes
Abbreviations ND = North Dakota ft or ’ = feet NAD = North American Datum NA = not applicable In = inch HCL = Hydrochloric acid sli. = slightly v. = very TD = Total Depth Abbreviations from Unified Soil Classification System (USCS) GW = well-graded gravel GP = poorly-graded gravel GM = silty gravel GC = clayey gravel SW= well-graded sand SP = poorly-graded sand SM = silty sand SC = clayey sand ML = silt CL = clay CH = fat clay Soil lens is indicated by parenthesis. Example: SM(SP) indicates lenses of SP in predominantly SM unit See ASTM International (2000) for description of USCS visual-manual procedure Soil Descriptions Consistency or Density, Geological Society of America (GSA) or Munsell color name (code), grain size, USCS name, minor characteristics, plasticity, moisture

CONTISTENCY (Clay and Silt)
Very Soft Soft Firm N<2 N = 2-4 N = 5-8 Pocket Penetrometer <0.25 0.25-0.50 0.50-1.0 Easily penetrated several centimeters (cm) by fist Easily penetrated several cm by thumb Can not be penetrated several cm by thumb with moderate effort Readily indented by thumb Readily indented with thumbnail Indented with difficulty by thumbnail

Stiff N = 9-15 1.0-2.0 Very Stiff N = 16-30 2.0-4.0 Hard N > 30 >4.0 N = Standard penetration resistance where Nm = number of blows from 0.5 to 1.0 ft + number of blows from 1.0 to 1.5 ft Very Loose Loose Compact Dense Very Dense N = 0-4 N = 4-10 N = 10-30 N = 30-50 N > 50 DENSITY (Sand) Easily penetrated with shovel handle Easily excavated with hand shovel Difficult to excavate with hand shovel Must be loosened with pick to excavate Cannot be penetrated with ¼-inch steel probe

For Munsell color code see either Munsell Color (1998) or Rock-Color Chart Committee (1991). Component Proportion
Trace Little Some And 0-5% 5-12% 12-30% 30-50%

Dry Slightly Moist Moist Very Moist Wet

MOISTURE Absence of moisture, dusty, dry to the touch Apparent moisture but well below optimum moisture content Damp, but no visible water; at or near optimum moisture content Above optimum moisture content Visible free water, below water table

FIELD PLASTICITY Nonplastic A 1/8-inch thread cannot be rolled at any water content Low The thread can barely be rolled and the lump cannot be formed when drier than the plastic limit Medium The thread is easy to roll and not much time required to reach the plastic limit. The thread cannot be rerolled after reaching the plastic limit. High It takes considerable time rolling and kneading to reach the plastic limit. The thread can be rerolled several time after reaching the plastic limit. From ASTM International (2000).

Rock Descriptions Weathered state, Geological Society of America (GSA) or Munsell color name (code), grain size, ROCK TYPE, minor characteristics, moisture Abbreviations Clst = claystone Sltst = siltstone Ss = sandstone

Weathering
Term
Fresh

Slightly Weathered Moderately Weathered Highly weathered Completely Weathered Residual Soil

No visible sign of rock material weathering: perhaps slight discoloration on major discontinuity surfaces Discoloration indicates weathering of rock material and discontinuity surfaces. All the rock material may be discolored by weathering and may be somewhat weaker externally then in its fresh condition Less than half of the rock material is decomposed and/or disintegrated to a soil. Fresh or discolored rock is present either as a continuous framework or as corestones More than half of the rock material is decomposed and/or disintegrated to a soil. Fresh or discolored rock is present either as a continuous framework or as corestones All rock material is decomposed and/or disintegrated to soil. The original mass structure is still largely intact All rock material is convert to soil. The mass structure and material fabric are destroyed. There is a large change in volume, but the soil has not been significantly transported

Description

Grade

I

II III IV V VI

Rock Material Strength
Grade
R0 R1 R2 R3 R4 R5 R6

Description
Extremely Weak Rock Very Weak Rock Weak Rock Medium Strong Rock Strong Rock Very Strong Rock Extremely Strong Rock

Field Identification
Indented with thumbnail Crumbles under firm blows with point of geological hammer, can be peeled by a pocket knife Can be peeled by a pocket knife with difficulty, shallow indententations made by a firm blow with point of geological hammer Cannot be scraped or peeled with a pocket knife, specimen can be fractured with single blow of geologic hammer Speciman requires more than one blow of geologic hammer to fracture it Speciman requires many blows of geological hammer to fracture it Speciman can only be chipped with geological hammer

App. range of uniaxial compressive strength (MPa)

0.25 - 1.0 1.0 – 5.0 5.0 - 25 25 – 50 50 - 100 100 - 250 >250

REFERENCES
ASTM International. 2000. Designation D2488-00, Standard Practice for Description and Identification of Soils (Visual-Manual Procedure) in 2000 Annual Book of ASTM Standards: Soil and Rock (1) D420-D5779. ASTM International, West Conshohocken, PA. Munsell Color. 1998. Munsell Soil Color Charts revised Washable Edition. Gretag Macbeth, New Windsor, New York. Rock-Color Chart Committee. 1991. The Geological Society of America Rock-Color Chart with genuine Munsell® color chips. Distrubuted by the Geological Society of America, Boulder, Colorado.

APPENDIX D

MONITORING WELL CONSTRUCTION FORMS

July 2008

Golder Associates

063-2212

I:\06\2212\0400\AlluVallFlrStudy-Rev4 14JUL08\0632212_SH_AVF_rev04_RPT-FNL_14JUL08.doc

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 447703.4 E: 1364195.3 Drilling Summary
Total Depth: 18.1 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.66 Driller: Braun Intertec

2.7 0.0

2490.6 2487.9

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-01A
SHMW-01 2487.9 ft 2490.6 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/7/07 14:30 5/7/07 15:15 5/7/07 15:15 5/7/07 5/7/07 15:35 5/7/07 5/7/07 15:41 5/7/07 5/7/07 15:55 5/7/07 15:20 15:41 15:55 16:00

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None

Drilling Fluid:

Pro. Casing Protective Casing: 7 ft long, 6-inch dia. Steel

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.662 - 12.9 C1 2485.3 - 2475.0 12.9 - 17.7 S1 2475.0 - 2470.2 17.7 - 18.1 C2 2470.2 - 2469.9

9.3

2478.6

Well Development
Depth to water initial: 16.05 ft final: 19.22 ft Well developed with a bailer on 5/22/07

11.0

2476.9

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC threaded cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 1004 1035 1339 pH 6.34 6.29 6.34 Spec. Cond. 1.96 mS/cm 1.84 1.87 Temp (˚C) 7.4 7.4 7.7

12.9

2475.0

Sand Pack: 11.0 to 18.1 feet 45/55 Red Flint Sand

Recovery Data
20

Approx. Q = 0.021 gal/min Approx. s = 3.17 ft

17.7 18.1 18.1 18.1 N/A

2470.2 2469.9 2469.8

Grout Seal: 1 to 9.3 feet Puregold Medium Chips

% Recovery

NOT RECORDED

2469.8 NOT TO SCALE

Bentonite Seal: 9.3 to 11.0 feet Puregold Medium Chips

0

00:00

10:00

20:00 30:00 Time (min:sec)

40:00

Comments Puregold bentonite chips (bentonite seal) placed from 9.3 to 11.0 feet were hydrated with water before placing additional chips to near the ground surface. N/A indicates not applicable

Supervised by: Sarah Doyle and Adam Hobson

Golder Associates

Date: 5/7/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 447701.3 E: 1364200.0 Drilling Summary
Total Depth: 27.0 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.98 Driller: Braun Intertec

3.0 0.0

2490.8 2487.8

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-01S
SHMW-01 2487.8 ft 2490.8 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/7/07 9:32 5/7/07 11:15 5/7/07 11:30 5/7/07 11:33 5/7/07 11:33 5/7/07 13:11 5/7/07 13:11 5/7/07 13:48 5/7/07 14:15 5/7/07 14:25

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None

Drilling Fluid:

Pro. Casing Protective Casing: 7 ft long, 6-inch dia. Steel

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.982 - 23.8 C1 2484.8 - 2464.0 23.8 - 26.8 S1 2464.0 - 2461.0 26.8 - 27.0 C2 2461.0 - 2460.8

20.2

2467.6

Well Development
Depth to water initial: 14.96 ft final: 15.21 ft Well developed with a pump on 5/18/07

22.3

2465.5

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC slip cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 0854 0908 0916 0926 0934 pH 6.51 6.42 6.39 6.39 6.31 Spec. Cond. 1.21 mS/cm 1.23 1.28 1.27 1.28 Temp (˚C) 10.0 9.9 10.2 9.7 9.6

23.8

2464.0

Sand Pack: 22.3 to 27.0 feet 45/55 Red Flint Sand

Recovery Data
20

Approx. Q = 0.75 gal/min Approx. s = 0.25 ft

26.8 27.0 27.0 27.0 N/A

2461.0 2460.8 2460.8

Grout Seal: 1 to 20.2 feet CETCO Volclay Grout 20% solids

% Recovery

NOT RECORDED

2460.8 NOT TO SCALE

Bentonite Seal: 20.2 to 22.3 feet Puregold Medium Chips

0
00:00 10:00 20:00 30:00 Time (min:sec) 40:00

Comments Puregold bentonite chips (bentonite seal) placed from 20.2 to 22.3 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Sarah Doyle and Adam Hobson

Golder Associates

Date: 5/7/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 438175.0 E: 1370979.9 Drilling Summary
Total Depth: 18.0 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.71 Driller: Braun Intertec

2.7 0.0

2504.3 2501.6

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-09A1
SHMW-09 2501.6 ft 2504.3 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/3/07 8:55 5/3/07 9:30 5/3/07 5/3/07 5/3/07 9:30 9:37 9:55 5/3/07 5/3/07 5/3/07 9:37 9:55 9:59

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

5/3/07 10:30 5/3/07 10:32 5/3/07 10:32 5/3/07 10:35

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.712 - 12.9 C1 2498.9 - 2488.7 12.9 - 17.7 S1 2488.7 - 2483.9 17.7 - 18.0 C2 2483.9 - 2483.6

8.6

2493.0

Well Development
Depth to water initial: Dry, well not developed N/A ft final: N/A ft

10.9

2490.7

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Threaded End Cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time pH Spec. Cond. Temp (˚C)

12.9

2488.7

Sand Pack: 10.9 to18.0 feet 45/55 Red Flint Sand

Recovery Data
20 % Recovery

Approx. Q = Approx. s =

N/A N/A

gal/min ft

17.7 18.0 18.0 18.0 N/A

2483.9 2483.6 2483.6

Grout Seal: 1 to 8.6 feet CETCO Volclay Grout 20% solids

N/A

2483.6 NOT TO SCALE

Bentonite Seal: 8.6 to10.9 feet Puregold Medium Chips

0

00:00

10:00

20:00 30:00 Time (min:sec)

40:00

Comments Puregold bentonite chips (bentonite seal) placed from 8.6 to 10.9 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Robin Witt

Golder Associates

Date: 5/3/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
Site Location: Project Number:
Survey Coordinates:

2.4 0.0

2504.2 2501.8

South Heart, ND 063-2212 N: 438179.0 E: 1370976.6

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-09A2
SHMW-09 2501.8 ft 2504.2 ft

Drilling Summary
Total Depth: 24.0 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.42 Driller: Braun Intertec

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/2/07 16:33 5/2/07 17:12 5/2/07 17:12 5/2/07 17:25 5/2/07 17:25 5/2/07 17:58 5/2/07 17:58 5/2/07 18:05 5/3/07 5/3/07 8:00 8:45 5/3/07 5/3/07 8:45 8:50

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.424 - 20.7 C1 2499.3 - 2481.1 20.7 - 23.7 S1 2481.1 - 2478.1 23.7 - 23.8 C2 2478.1 - 2478.0

17.9

2483.9

Well Development
Depth to water initial: 18.84 ft final: ~24 ft Well developed with a pump on 5/17/07

19.3

2482.5

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Slip Cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 1250 1258 1300 1302 1305 pH 7.32 7.33 7.27 7.31 7.29 Spec. Cond. 6.10 mS/cm 6.45 6.87 6.45 6.93 Approx. Q = Approx. s = Temp (˚C) 8.5 8.5 8.3 8.5 8.4 1 ~5 gal/min ft

20.7

2481.1

Sand Pack: 19.3 to 23.8 feet 45/55 Red Flint Sand

Recovery Data
20 % Recovery

23.7 23.8 23.8 24.0

2478.1 2478.0 2478.0 2477.8 NOT TO SCALE

Grout Seal: 1 to 17.9 feet CETCO Volclay Grout 20% solids

NOT RECORDED

Bentonite Seal: From 17.9-19.3 feet Puregold Medium Chips

0

00:00

10:00

20:00 30:00 Time (min:sec)

40:00

Comments Puregold bentonite chips (bentonite seal) placed from 17.9 to 19.3 feet were hydrated with water before placing grout. Slough from 23.8 to 24.0 feet.

Supervised by: Ed Pottorff and Robin Witt

Golder Associates

Date: 5/2/07-5/3/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 438182.0 E: 1370973.5 Drilling Summary
Total Depth: 30.2 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.72 Driller: Braun Intertec

2.7 0.0

2504.6 2501.8

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-09S
SHMW-09 2501.8 ft 2504.6 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/2/07 10:30 5/2/07 12:30 5/2/07 13:40 5/2/07 13:46 5/2/07 13:46 5/2/07 14:40 5/2/07 14:40 5/2/07 15:26 5/2/07 15:26 5/2/07 16:00 5/2/07 16:00

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.716 - 27.5 C1 2499.1 - 2474.3 27.5 - 29.5 S1 2474.3 - 2472.3 29.5 - 29.7 C2 2472.3 - 2472.1

23.9

2477.9

Well Development
Depth to water initial: 18.96 ft final: 31.55 ft Well developed with a bailer on 5/17/07 and 5/22/07

26.2

2475.6

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC slip cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 0927 1408 1451 pH 8.05 7.76 7.77 Spec. Cond. 2.69 mS/cm 2.67 2.59 Temp (˚C) 8.6 9.4 9.0

27.5

2474.3

Sand Pack: 26.2 to 29.7 feet 45/55 Red Flint Sand

Recovery Data
20

Approx. Q = 0.01 gal/min Approx. s = 11.22 ft

29.5 29.7 29.7 30.2

2472.3 2472.1 2472.1 2471.6 NOT TO SCALE

Grout Seal: 5 to 23.9 feet CETCO Volclay Grout 20% solids 1-50lb bag / 24 gallons water Bentonite Seal: 23.9 to 26.2 and 0 to 5 ft Puregold Medium Chips,

% Recovery

NOT RECORDED

0
00:00 10:00 20:00 30:00 Time (min:sec) 40:00

Comments Puregold bentonite chips (bentonite seal) placed from 23.9 to 26.2 feet were hydrated with water before placing grout. Slough from 29.7 to 30.2 feet.

Supervised by: Ed Pottorff

Golder Associates

Date: 5/2/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 434144.7 E: 1362250.2 Drilling Summary
Total Depth: 18.0 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.45 Driller: Braun Intertec

2.5 0.0

2520.6 2518.2

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-11A1
SHMW-11 2518.2 ft 2520.6 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/2/07 7:50 5/2/07 8:10 5/2/07 5/2/07 5/2/07 5/2/07 5/2/07 8:10 8:15 8:45 9:20 9:30 5/2/07 5/2/07 5/2/07 5/2/07 5/2/07 8:15 8:45 9:20 9:30 9:35

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.453 - 13.0 C1 2515.7 - 2505.2 13.0 - 17.8 S1 2505.2 - 2500.4 17.8 - 18.0 C2 2500.4 - 2500.2

8.1

2510.1

Well Development
Depth to water initial: 13.82 ft final: 16.49 ft Well developed with a bailer on 5/17/07, 5/18/07, and 5/22/07

10.7

2507.5

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Threaded end cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 1854 1053 1257 1108 1132 pH 7.20 7.05 7.26 7.12 7.17 Spec. Cond. 1.81 mS/cm 1.95 1.91 1.85 1.87 Temp (˚C) 12.8 9.0 9.0 8.1 8.0

13.0

2505.2

Sand Pack: 10.7 to 18.0 feet 45/55 Red Flint Sand

Recovery Data
20 % Recovery

Approx. Q = ~0.03 gal/min Approx. s = 2.67 ft

17.8 18.0 18.0 18.0 N/A

2500.4 2500.2 2500.2

Grout Seal: 0 to 8.1 feet CETCO Volclay Grout 20% solids

NOT RECORDED

2500.2 NOT TO SCALE

Bentonite Seal: 8.1 to 10.7 feet Puregold Medium Chips

0

00:00

10:00

20:00 30:00 Time (min:sec)

40:00

Comments Puregold bentonite chips (bentonite seal) placed from 8.1 to 10.7 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Ed Pottorff

Golder Associates

Date: 5/2/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 434139.4 E: 1362247.2 Drilling Summary
Total Depth: 24.0 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.18 Driller: Braun Intertec

2.2 0.0

2520.3 2518.1

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-11A2
SHMW-11 2518.1 ft 2520.3 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/1/07 15:00 5/1/07 15:30 5/1/07 15:30 5/1/07 15:42 5/1/07 15:44 5/1/07 16:10 5/1/07 16:10 5/1/07 16:17 5/1/07 16:50 5/1/07 17:08 5/1/07 17:08 5/1/07 17:10

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger SW pipeline (~50 gals.)

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.182 - 18.9 C1 2516.0 - 2499.2 18.9 - 23.6 S1 2499.2 - 2494.5 23.6 - 24.0 C2 2494.5 - 2494.2

14.5

2503.6

Well Development
Depth to water initial: 13.61 ft final: ~25 ft Well developed with a pump on 5/17/07

16.8

2501.3

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Threaded end cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 1739 1749 1801 1815 1826 pH 7.18 7.12 7.14 7.11 7.13 Spec. Cond. 1.76 mS/cm 2.06 2.23 2.29 2.21 Approx. Q = Approx. s = Temp (˚C) 10.0 11.1 9.9 10.5 10.7 0.6 gal/min ~11 ft

18.9

2499.2

Sand Pack: 16.8 to 24.0 feet 45/55 Red Flint Sand

Recovery Data
20

23.6 24.0 24.0 24.0 N/A

2494.5 2494.2 2494.1

Grout Seal: 1 to 14.5 feet CETCO Volclay Grout 20% solids

% Recovery

NOT RECORDED

2494.1 NOT TO SCALE

Bentonite Seal: 14.5 to 16.8 feet Puregold Medium Chips

0
00:00 10:00 20:00 30:00 Time (min:sec) 40:00

Comments Puregold bentonite chips (bentonite seal) placed from 14.5 to 16.8 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Robin Witt

Golder Associates

Date: 5/1/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 434134.8 E: 1362244.5 Drilling Summary
Total Depth: 30.5 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.20 Driller: Braun Intertec

2.2 0.0

2520.4 2518.3

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-11S
SHMW-11 2518.3 ft 2520.4 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/1/07 11:10 5/1/07 12:45 5/1/07 12:55 5/1/07 13:30 5/1/07 13:30 5/1/07 13:45 5/1/07 13:45 5/1/07 13:55 5/1/07 14:30 5/1/07 14:45 5/1/07 14:45 5/1/07 14:53

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger SW pipeline

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.197 - 29.4 C1 2516.1 - 2488.9 29.4 - 30.3 S1 2488.9 - 2488.0 30.3 - 30.5 C2 2488.0 - 2487.8

24.9

2493.4

Well Development
Depth to water initial: 13.57 ft final: ~30 ft Well developed with a pump on 5/17/07 and then with a bailer on 5/18/07

27.0

2491.3

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Slip Cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 1844 1048 1203 1253 pH 7.08 6.82 6.97 7.06 Spec. Cond. 2.57 mS/cm 2.69 2.54 2.65 Temp (˚C) 10.2 11.3 12.9 10.7

29.4

2488.9

Sand Pack: 26.95 to 30.5 feet 45/55 Red Flint Sand

Recovery Data
20 % Recovery

Approx. Q = ~ 0.07 gal/min Approx. s = ~ 16 ft

30.3 30.5 30.5 30.5 N/A

2488.0 2487.8 2487.8

Grout Seal: 1 to 24.9 feet CETCO Volclay Grout 20% solids

NOT RECORDED

2487.8 NOT TO SCALE

Bentonite Seal: 24.9 to 26.95 feet Puregold Medium Chips

0

00:00

10:00

20:00 30:00 Time (min:sec)

40:00

Comments Puregold bentonite chips (bentonite seal) placed from 24.9 to 26.95 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Robin Witt

Golder Associates

Date: 5/1/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 433181.7 E: 1365965.0 Drilling Summary
Total Depth: 17.0 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.65 Driller: Braun Intertec

2.6 0.0

2516.8 2514.1

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-14A1
SHMW-14 2514.1 ft 2516.8 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/5/07 11:30 5/5/07 11:50 5/5/07 11:59 5/5/07 11:59 5/5/07 11:59 5/5/07 12:55 5/5/07 12:55 5/5/07 13:00 5/5/07 13:35 5/5/07 13:40 5/5/07 13:40 5/5/07 13:45

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None (See Comments)

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.648 - 12.0 C1 2511.5 - 2502.1 12.0 - 16.8 S1 2502.1 - 2497.3 16.8 - 17.0 C2 2497.3 - 2497.1

7.1

2507.0

Well Development
Depth to water initial: 9.68 ft final: ~19.5 ft Well developed with a pump on 5/17/07

9.2

2504.9

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Threaded end cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 1613 1618 1623 1627 1630 pH 7.75 7.73 7.69 7.69 7.72 Spec. Cond. 2.71 mS/cm 2.86 2.97 3.02 3.03 Temp (˚C) 8.4 8.7 8.1 7.9 8.1

12.0

2502.1

Sand Pack: 9.2 to 17.0 feet 45/55 Red Flint Sand

Recovery Data
20 % Recovery

Approx. Q = 1.5 gal/min Approx. s = ~ 9.8 ft

16.8 17.0 17.0 17.0 N/A

2497.3 2497.1 2497.1

Grout Seal: 1 to 7.1 feet CETCO Volclay Grout 20% solids

NOT RECORDED

2497.1 NOT TO SCALE

Bentonite Seal: 7.1 to 9.2 feet Puregold Medium Chips

0 00:00 10:00 20:00 30:00 Time (min:sec) 40:00

Comments Puregold bentonite chips (bentonite seal) placed from 7.1 to 9.2 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Sarah Doyle and Robin Witt

Golder Associates

Date: 5/5/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 433184.7 E: 1365967.5 Drilling Summary
Total Depth: 29.0 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.50 Driller: Braun Intertec

2.5 0.0

2516.9 2514.4

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-14A2
SHMW-14 2514.4 ft 2516.9 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/5/07 8:15 5/5/07 8:47 5/5/07 5/5/07 5/5/07 9:25 9:27 9:56 5/5/07 5/5/07 9:27 9:56

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None (See Comments)

5/5/07 10:06

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

5/5/07 10:45 5/5/07 11:14 5/5/07 11:14 5/5/07 11:16

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.495 - 24.0 C1 2511.9 - 2490.4 24.0 - 28.8 S1 2490.4 - 2485.6 28.8 - 29.0 C2 2485.6 - 2485.4

19.2

2495.2

Well Development
Depth to water initial: 9.92 ft final: 11.92 ft Well developed with a pump on 5/17/07

21.3

2493.1

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Threaded end cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 1550 1553 1556 1559 1604 pH 7.71 7.75 7.76 7.75 7.75 Spec. Cond. 2.64 mS/cm 2.71 2.71 2.68 2.71 Approx. Q = Approx. s = Temp (˚C) 9.2 9.1 9.1 8.8 9.7 1.5 2 gal/min ft

24.0

2490.4

Sand Pack: 21.3 to 29.0 feet 45/55 Red Flint Sand

Recovery Data
20
% Recovery

28.8 29.0 29.0 29.0 N/A

2485.6 2485.4 2485.4

Grout Seal: 1 to 19.2 feet CETCO Volclay Grout 20% solids

NOT RECORDED

2485.4 NOT TO SCALE

Bentonite Seal: 19.2 to 21.3 feet Puregold Medium Chips

0
00:00 10:00 20:00 30:00 Time (min:sec) 40:00

Comments Puregold bentonite chips (bentonite seal) placed from 19.2 to 21.3 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Sarah Doyle and Robin Witt

Golder Associates

Date: 5/5/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 433187.9 E: 1365969.9 Drilling Summary
Total Depth: 40.0 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.51 Driller: Braun Intertec

2.5 0.0

2517.1 2514.6

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-14S
SHMW-14 2514.6 ft 2517.1 ft

Construction Time Log
Task drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/4/07 11:45 5/4/07 13:30 5/4/07 14:10 5/4/07 14:15 5/4/07 14:15 5/4/07 15:32 5/4/07 15:32 5/4/07 15:40 5/4/07 16:18 5/4/07 16:54 5/4/07 16:55 5/4/07 17:00

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger SW pipeline (~75 gals.)

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.511 - 34.9 C1 2512.1 - 2479.7 34.9 - 39.8 S1 2479.7 - 2474.8 39.8 - 40.0 C2 2474.8 - 2474.6

29.9

2484.7

Well Development
Depth to water initial: 9.95 ft final: 33 ft Well developed with a pump on 5/17/07

31.9

2482.7

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Threaded end cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 1433 1443 1459 1535 1542 pH 7.45 7.40 7.43 7.47 7.49 Spec. Cond. 2.38 mS/cm 2.74 2.71 2.75 2.32 Temp (˚C) 10.1 10.2 10.2 9.2 9.9

34.9

2479.7

Sand Pack: 31.9 to 40.0 feet 45/55 Red Flint Sand

Recovery Data
20 % Recovery

Approx. Q = 1 gal/min Approx. s = 23.05 ft

39.8 40.0 40.0 40.0 N/A

2474.8 2474.6 2474.6

Grout Seal: 0 to 29.9 feet CETCO Volclay Grout 20% solids

NOT RECORDED

2474.6 NOT TO SCALE

Bentonite Seal: 29.9 to 31.9 feet Puregold Medium Chips

0

00:00

10:00

20:00 30:00 Time (min:sec)

40:00

Comments Drilled to 40 ft, sampled to 42 ft. Puregold bentonite chips (bentonite seal) placed from 29.9 to 31.9 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Robin Witt

Golder Associates

Date: 5/4/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 448524.1 E: 1376139.3 Drilling Summary
Total Depth: 14.1 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.51 Driller: Braun Intertec

2.5 0.0

2464.3 2461.8

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-15A1
SHMW-15 2461.8 ft 2464.3 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/4/07 8:25 5/4/07 8:46 5/4/07 5/4/07 5/4/07 8:50 8:55 9:30 5/4/07 5/4/07 5/4/07 8:55 9:30 9:37

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

5/4/07 10:10 5/4/07 10:15 5/4/07 10:15 5/4/07 10:17

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.505 - 9.0 C1 2459.3 - 2452.8 9.0 - 13.8 S1 2452.8 - 2448.0 13.8 - 14.0 C2 2448.0 - 2447.9

4.6

2457.2

Well Development
Depth to water initial: 9.65 ft final: 11.39 ft Well developed with a pump on 5/17/07

6.8

2455.0

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Threaded end cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 0856 0906 0918 0927 0935 pH 7.34 7.31 7.32 7.32 7.34 Spec. Cond. 3.20 mS/cm 3.14 3.20 3.20 3.16 Temp (˚C) 7.5 8.0 7.2 8.2 7.0

9.0

2452.8

Sand Pack: 6.8 to 14.1 feet 45/55 Red Flint Sand

Recovery Data
20

Approx. Q = 0.6 gal/min Approx. s = 1.74 ft

13.8 14.0 14.1 14.1 N/A

2448.0 2447.9 2447.7

Grout Seal: 1 to 4.6 feet CETCO Volclay Grout 20% solids

% Recovery

NOT RECORDED

2447.7 NOT TO SCALE

Bentonite Seal: 4.6 to 6.8 feet Puregold Medium Chips

0 00:00 10:00 20:00 30:00 Time (min:sec) 40:00

Comments Puregold bentonite chips (bentonite seal) placed from 4.6 to 6.8 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Robin Witt

Golder Associates

Date: 5/4/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 448528.3 E: 1376138.0 Drilling Summary
Total Depth: 23.7 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.30 Driller: Braun Intertec

2.3 0.0

2464.3 2462.0

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-15A2
SHMW-15 2462.0 ft 2464.3 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/3/07 16:28 5/3/07 16:50 5/3/07 16:52 5/3/07 17:00 5/3/07 17:00 5/3/07 17:42 5/3/07 17:42 5/3/07 17:47 5/4/07 5/4/07 7:55 8:15 5/4/07 5/4/07 8:15 8:20

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None (See Comments)

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.303 - 18.6 C1 2459.7 - 2443.4 18.6 - 23.4 S1 2443.4 - 2438.6 23.4 - 23.6 C2 2438.6 - 2438.4

14.7

2447.3

Well Development
Depth to water initial: 9.16 ft final: 24.31 ft Well developed with a pump on 5/17/07 and with a bailer on 5/22/07

16.7

2445.3

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Threaded end cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 1143 1201 1221 1332 pH 7.72 7.66 7.78 7.80 Spec. Cond. 3.12 mS/cm 2.96 2.92 2.97 Temp (˚C) 11.1 8.2 8.2 8.8

18.6

2443.4

Sand Pack: 16.7 to 23.7 feet 45/55 Red Flint Sand

Recovery Data
20

Approx. Q = ~ 0.05 gal/min Approx. s = 15.38 ft

23.4 23.6 23.7 23.7 N/A

2438.6 2438.4 2438.3

Grout Seal: 1 to 14.7 feet CETCO Volclay Grout 20% solids

% Recovery

NOT RECORDED

2438.3 NOT TO SCALE

Bentonite Seal: 14.7 to 16.7 feet Puregold Medium Chips

0 00:00 10:00 20:00 30:00 Time (min:sec) 40:00

Comments Puregold bentonite chips (bentonite seal) placed from 14.7 to 16.7 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Robin Witt

Golder Associates

Date: 5/3/07

Depth (ft)

Elevation (ft)

MONITORING WELL CONSTRUCTION SUMMARY
South Heart, ND 063-2212 Survey Coordinates: N: 448532.3 E: 1376136.5 Drilling Summary
Total Depth: 33.7 ft Borehole Diameter: 7.5 in Casing Stickup Height: 2.74 Driller: Braun Intertec

2.7 0.0

2464.4 2461.7

Site Location: Project Number:

Well No. Boring No. X-Ref:
Elevation Ground Level Top of Casing

SHMW-15S
SHMW-15 2461.7 ft 2464.4 ft

Construction Time Log
Task Drilling PVC Sand Pack Bent. Seal Start Finish Date Time Date Time 5/3/07 11:40 5/3/07 13:25 5/3/07 13:40 5/3/07 13:45 5/3/07 13:45 5/3/07 14:57 5/3/07 14:57 5/3/07 15:07 5/3/07 15:37 5/3/07 16:06 5/3/07 16:06 5/3/07 16:17

ft

(Chris, Brian, Brad)
Rig: Bits(s): CME 850 Hollow Stem Auger None (See Comments)

Drilling Fluid:

Grout Seal Protective Casing: 6-inch diam. Steel Protector

Well Design and Specifications
Basis: Casing String(s): C = Casing, S = Screen Depth String(s) Elevation +2.735 - 28.6 C1 2458.9 - 2433.1 28.6 - 33.3 S1 2433.1 - 2428.4 33.3 - 33.7 C2 2428.4 - 2428.0

23.9

2437.8

Well Development
Depth to water initial: 1.59 ft final: 1.8 ft Well developed with a pump on 5/17/07

25.9

2435.8

Casing: C1 C2 Screen: S1 S2

2-inch diam. Sch 40 PVC 2-inch diam. Sch 40 PVC Threaded end cap 2-inch diam. Sch 40 PVC with 0.010-inch slots

Stabilization Test Data
Time 1032 1043 1105 1133 1154 pH 7.65 7.64 7.86 7.68 7.71 Spec. Cond. 2.37 mS/cm 2.40 2.41 2.44 2.40 Temp (˚C) 8.9 9.1 9.3 9.5 9.3

28.6

2433.1

Sand Pack: 25.9 to 33.7 feet 45/55 Red Flint Sand

Recovery Data
20 % Recovery

Approx. Q = ~0.7 gal/min Approx. s = 0.21 ft

33.3 33.7 33.7 33.7 N/A

2428.4 2428.0 2428.0

Grout Seal: 1 to 23.9 feet CETCO Volclay Grout 20% solids

NOT RECORDED

2428.0 NOT TO SCALE

Bentonite Seal: 23.9 to 25.9 feet Puregold Medium Chips

0
00:00 10:00 20:00 30:00 Time (min:sec) 40:00

Comments Puregold bentonite chips (bentonite seal) placed from 23.9 to 25.9 feet were hydrated with water before placing grout. N/A indicates not applicable

Supervised by: Robin Witt

Golder Associates

Date: 5/3/07