Bryan Schaap 2004 vector digital data Data Series USGS DS 102 Rapid City, South Dakota U.S. Geological Survey Figure 6 (sheet 2) in Howells (1982) was scanned and digitized on-screen to create this coverage. This figure was published at a scale of about 1:250,000. http://water.usgs.gov/lookup/getspatial?ds102_gw_resources This coverage contains information about the probability of obtaining a water supply within the Standing Rock Indian Reservation, Sioux County, North Dakota, and Corson County, South Dakota. The digital data were produced by the U.S. Geological Survey (USGS) in cooperation with the U.S. Environmental Protection Agency. The possibility of obtaining adequate supplies of good quality water from surficial deposits generally is limited to bedrock formations overlying the Pierre Shale where their total thickness is at least 150 feet, to four buried glacial valleys in eastern Sioux County, and to alluvium along Cedar Creek and the Cannonball and Missouri Rivers. In a few places, adequate supplies of stock or domestic water may be found in alluvium along the Grand River and in a few terraces (Howells, 1982). Identified units include: 1) Excellent--Well yields may range from 500 to 1,000 gallons per minute. Dissolved-solids concentration probably is less than 1,600 milligrams per liter; 2) Very good--May range from 200 to 500 gallons per minute. Dissolved-solids concentration probably is less than 1,600 milligrams per liter; 3) Good--Well yields range from 10 to 200 gallons per minute. Dissolved-solids concentration is probably less than 1,600 milligrams per liter; 4) Good to fair--Well yields range from 2 to 10 gallons per minute, locally may be larger; 5) Fair--Well yields may range from 2 to 10 gallons per minute. Greater chance that any water found will be of poor quality; 6) Fair to poor--Locally possible to obtain well yields of 1 to 5 gallons per minute. Water is commonly of poor quality; and 7) Very poor--Low probability of obtaining water. Any water found is likely to be of very poor quality. Figure 6 in Howells (1982) was scanned and digitized on-screen to create this coverage. See cross reference information for more detail. This coverage was prepared to assist the Standing Rock Sioux Tribe in developing a pesticide management plan. This electronic report was subjected to the same review standard that applies to all U.S. Geological Survey reports. Reviewers were asked to check the topological consistency, tolerances, attribute frequencies and statistics, projection and geographic extent. The reviewers checked the metadata and readme files for completeness and accuracy. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ARC/INFO format, this metadata file may include some ARC/INFO-specific terminology. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 1982 ground condition Complete None planned -102.051501 -100.313436 46.429634 45.441269 None. shallow ground-water resources inlandWaters Standing Rock Indian Reservation, Sioux County, North Dakota, Corson County, South Dakota None. None. U.S. Geological Survey Bryan Schaap Hydrologist 605-352-4241 605-352-4304 bdschaap@usgs.gov Compilation of this coverage and associated metadata was performed in cooperation with the U.S. Environmental Protection Agency. Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800 L.W. Howells 1982 map Hydrologic Investigations Atlas U.S. Geological Survey Hydrologic Investigations Atlas HA-644 U.S. Geological Survey The base map was 1:250,000 USGS quadrangles. Multiple visual checks were done to verify that the attribute data were coincident with the original source map. Polygon and chain-node topology present. This data set consists of polygons indicating the availability of shallow ground-water resources within the Standing Rock Indian Reservation, Sioux County, North Dakota, and Corson County, South Dakota. L.W. Howells 1982 map Hydrologic Investigations Atlas U.S. Geological Survey Hydrologic Investigations Atlas HA-644 U.S. Geological Survey The base map was 1:250,000 USGS quadrangles. 250,000 paper This product is the digital version of the availability of shallow ground-water resources depicted in Sheet 2, figure 6, of HA-644. STEP 1: The map was scanned by the South Dakota Geologic Survey and the image file was sent to the USGS on a CD. STEP 2: The image file was registered using 22 points with an rms of 71.9 meters. A new rectified image was created with a cell size of 22.6 meters using the nearest neighbor option. STEP 3: An arc coverage was created by digitizing on-screen using the rectified image file as the background. STEP 4: The build command was used to generate a polygon coverage from the arc coverage. 2004 Bryan Schaap U.S. Geological Survey Hydrologist mailing and physical address

111 Kansas Ave SE

Huron South Dakota 57350 USA 605-352-4241 605-352-4304 bdschaap@usgs.gov The first draft of the metadata was created by Bryan Schaap using ArcCatalog on ARC/INFO data set /home/bds/standing_rock/report/gw_resources. 2004 Vector Complete chain 163 Label point 51 GT-polygon composed of chains 51 Point 4 Universal Transverse Mercator 14 0.999600 -99.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000256 0.000256 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 gw_resources.aat FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. FNODE# Internal node number for the beginning of an arc (from-node). ESRI Whole numbers that are automatically generated. TNODE# Internal node number for the end of an arc (to-node). ESRI Whole numbers that are automatically generated. LPOLY# Internal node number for the left polygon. ESRI Whole numbers that are automatically generated. RPOLY# Internal node number for the right polygon. ESRI Whole numbers that are automatically generated. LENGTH Length of feature in internal units. ESRI Positive real numbers that are automatically generated. GW_RESOURCES# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. GW_RESOURCES-ID User-defined feature number. ESRI Sequential unique whole numbers that are automatically generated. gw_resources.pat FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. AREA Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. PERIMETER Perimeter of feature in internal units. ESRI Positive real numbers that are automatically generated. GW_RESOURCES# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. GW_RESOURCES-ID User-defined feature number. ESRI Sequential unique whole numbers that are automatically generated. PROBABILITY Probability of obtaining a water supply Howells (1982), sheet 2, figure 6 Excellent Well yields may range from 500 to 1,000 gallons per minute. Dissolved-solids concentration probably is less than 1,600 milligrams per liter Howells (1982), sheet 2, figure 6 Very good May range from 200 to 500 gallons per minute. Dissolved-solids concentration probably is less than 1,600 milligrams per liter Howells (1982), sheet 2, figure 6 Good Well yields range from 10 to 200 gallons per minute. Dissolved-solids concentration is probably less than 1,600 milligrams per liter. Howells (1982), sheet 2, figure 6 Good to fair Well yields range from 2 to 10 gallons per minute, locally may be larger. Howells (1982), sheet 2, figure 6 Fair Well yields may range from 2 to 10 gallons per minute. Greater chance that any water found will be of poor quality. Howells (1982), sheet 2, figure 6 Fair to poor Locally possible to obtain well yields of 1 to 5 gallons per minute. Water is commonly of poor quality. Howells (1982), sheet 2, figure 6 Very poor Low probability of obtaining water. Any water found is likely to be of very poor quality. Howells (1982), sheet 2, figure 6 U.S. Geological Survey Ask USGS - Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Export Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/gw_resources.e00.gz None. This dataset is provided by USGS as a public service. 20041108 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ds102_gw_resources FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998