Montana Bureau of Mines and Geology (MBMG) 20121228 Helena, Montana Montana State Library The former name of this data set on the NRIS web site was "gwicwells" https://ftpgeoinfo.msl.mt.gov/Data/Spatial/NonMSDI/Wells/Archive/GWIC_Wells_20121228.zip http://mslapps.mt.gov/Geographic_Information/Data/DataList/datalist_Details.aspx?did={B40FCBD4-DA34-483A-A8C9-F9C1E95F7A21} This data set contains point locations and selected attributes for water wells within Montana abstracted from databases maintained at the Ground-Water Information Center (GWIC) at the Montana Bureau of Mines and Geology. Original data sources include water rights filings, water well logs, visits to water wells, and publications of the Montana Bureau of Mines and Geology, the U.S. Geological Survey, and others. The databases are maintained at the Ground-Water Information Center. Ground-water site locations and selected fields are forwarded annually to the State Library. Fields provided in this data set are a subset of the fields available in the database at the GWIC. Additional data for ground-water resources in Montana can be obtained from the GWIC website at http://mbmggwic.mtech.edu. Data from GWIC are useful for describing the ground-water resources of Montana, land use planning, determination of drilling depths, and understanding ground-water flow. 1860 20121217 ground condition Current with receipts of new water well logs The GWIC database is active and thousands of data corrections and thousands of new well logs are added to the system annually. Updates of the database are forwarded annually to the State Library. -116.161605 -103.646459 49.136945 44.356602 ISO 19115 Topic Category inlandWaters geoscientificInformation wells well ground water ground-water groundwater Montana None These data are currently intended to provide information on the distribution of wells in general rather than the locations of specific wells. Most of the well locations are derived from 1:250,000 scale maps and individual well identities should not be shown at map scales larger than this. Well data is updated continually at GWIC, and individual records at the State Library may be obsolete. Current data for any well, or updated data sets, can be obtained directly from the GWIC website at http://mbmggwic.mtech.edu. The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time. Montana Bureau of Mines and Geology Thomas Patton mailing address

1300 West Park Street

Butte MT 59701 406-496-4153 tpatton@mtech.edu https://ftpgeoinfo.msl.mt.gov/Documents/Maps/Thumbnails/20031113_424_thumb.jpg gwic.gif New well log data are entered into the database from original documents and verified one time during the data entry process. Historic data are verified against historic documents on a county by county basis. Due to work loads, well records for all Montana counties have not been verified against the original documents. To view the current status of verification, go to the On-Line Help section of the GWIC website at http://mbmggwic.mtech.edu. Well locations in GWIC do not represent the locations of all water wells in Montana. Although the total number of water wells constructed in the state is unknown, GWIC locations are thought to represent 50-60% of all water wells. Unless otherwise noted in the GWIC database by the presence of a site visit record, coordinates are derived from unverified locations provided by the landowner or water well driller. Significant errors in location occur in the unverified data. Points with verified locations are generally within about 10 of feet of their true position. The GEOMETHOD attribute indicates how the coordinates were obtained and are an indicator of the positional accuracy of each point. The meaning of commonly used GEOMETHOD codes are as follows: -- TRS-TWN: generated from township, range, section, and tract using township corners digitized by the U.S. Geological Survey in the 1970s from 1:250,000 scale maps. -- TRS-SEC: generated from township, range, section, and tract using section corners digitized from 1:24,000 maps. -- NAV-GPS: uncorrected Global Positioning System locations. -- SURGPS: corrected Global Positioning System locations. -- MAP: digitized from 1:24,000 USGS Topographic maps NAV-GPS, SUR-GPS, and MAP represent confirmed locations. TRS-SEC and TRS-TWN represent unconfirmed locations if the number of tract designations in the TRACT field is less than 4 and there is no site visit record in the GWIC database. A complete description of the GEOMETHOD flags can be found in the On-Line Help section of the GWIC website at http://mbmggwic.mtech.edu. The coordinates for the majority of the wells were obtained with the TRS-TWN method. Coordinates in selected counties (Flathead, Lake, Mineral, Missoula, Ravalli, Yellowstone, and Treasure) were obtained using the TRS-SEC method. However, in both cases the greatest source of horizontal error is the original landowner/water well driller's ability to correctly fill out the township, range, section, and tract description. Coordinates converted from township, range, section, and tract descriptions generally fall within the boundaries of the smallest described tract. Section based conversions are more accurate than township based conversions because the section corners used in section based conversions have been digitized, and not interpolated from township corners. Ground-Water Assessment Program at the Montana Bureau of Mines and Geology 20121217 Butte Montana Bureau of Mines and Geology paper records 1860 20121217 ground condition GWIC The data set was generated from this source. Water well log data are entered into the GWIC database from original paper documents and verified to match original data during the data entry process. Some well records are created from visits to wells discovered during field work by various projects at the Montana Bureau of Mines and Geology. For well records created from site visits, there will be no paper well log at the Montana Bureau of Mines and Geology and the database will only contain information discovered during the field visit. The database is corrected when errors are discovered through use of data or by outside data users. Coordinates are assigned to GWIC records using a variety of methods as described by the GEOMETHOD flag in the data retrieval. See the description of common GEOMETHOD flags used in GWIC in the Horizontal_Positional_Accuracy_Report section of this document. TRS-TWN and TRS-SEC based coordinates are calculated automatically at the time a record is first filed or the location is modified. MAP, NAV-GPS, and SUR-GPS coordinates are posted to the database and remained unchanged until an error may be discovered. At that time corrected coordinates for the point would be entered into the database and the township, range, section and tract modified to match the digitized or GPS coordinates. Entity point 231808 State Plane Coordinate System 2500 45.000000 49.000000 -109.500000 44.250000 600000.000000 0.000000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GWIC_Wells_20121228.dbf Point feature class FID Shapefile sequence number Shape Feature geometry MNUMBER Unique number that links all GWIC records together DNRC_NO Water right number assigned to well/site by the Department of Natural Resources and Conservation SITE_NAME Name of the well/site. Most often the name of the land owner for whom the well was originally drilled LATITUDE Latitude of well/site LONGITUDE Longitude of well/site GEOMETHOD Method used to determine the latitude and longitude TRS-TWN generated from township, range, section, and tract using township corners digitized by the U.S. Geological Survey in the 1970s from 1:250,000 scale maps TRS-SEC generated from township, range, section, and tract using section corners digitized from 1:24,000 maps NAV-GPS uncorrected Global Positioning System locations SUR-GPS corrected Global Positioning System locations MAP digitized from 1:24,000 USGS Topographic maps DATUM Geodetic datum for the latitude and longitude TOWNSHIP Township number of the public land survey township in which the well/site is located RANGE Range number of the public land survey township in which the well/site is located ISP_SECT Public land survey section number in which the well is located TRACT The tracts (from largest to smallest) that describe the location of the well/site within the section A Northeast B Northwest C Southwest D Southeast COUNTY County in Montana where the well/site is located TYPE Whether the site is a water well, petroleum well, borehole, spring, or other site type TOT_DEPT Total depth of the well in feet PWL The distance in feet below land surface the water is found during pumping SWL The distance in feet below land surface the water is found when the well is not pumping RECOV_WL The "recovery" water level (in feet below casing top) measured by the driller after a production test has been completed YIELD The reported yield of the well in gallons per minute TEST_TYPE The method by which the yield was determined TEST_DUR The duration of the performance test in hours RECOV_TM The length of time in hours after production stopped that the recovery water level was measured DRILLSET The distance in feet below ground surface that the drill stem was placed during a production test using air to lift the water from the well WHO_DRILL The name of the well driller or contractor LIC_NO The water well driller or water well contractor license number COMP_DATE The date that the well was completed PWS_ID A number consisting of the Department of Environmental Quality's identifier for a public water supply (5 digits) concatenated with the source number for the well/site in the public water supply (3 digits) GWSI_ID A 15 digit number that is the U.S. Geological Survey's National Water Information System identifier for the well/site DATA_SOUR The source of data for the GWIC record GW4 Declaration of Vested Groundwater Rights LOG Drillers log INV Visit to the well/site by personnel from the Montana Bureau of Mines and Geology, the U.S. Geological Survey, or other agency QW Visit to well/site by personnel from the Montana Bureau of Mines and Geology, U.S. Geological Survey, or other agency to collect a water sample WQDATA Flag indicating whether GWIC has water quality data available for the well Y Water quality data is available N Water quality data is not available HYDROGRAPH Flag indicating whether GWIC has hydrograph data available for the well Y Hydrograph data is available N Hydrograph data is not available Montana State Library mailing address

PO Box 201800

Helena MT 59620-1800 406-444-5354 Montana Relay 711 406-444-0266 geoinfo@mt.gov Downloadable Data The Montana State Library provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time. 20150413 20121228 20010822 Montana Bureau of Mines and Geology Thomas Patton Program Leader, Montana Ground-Water Assessment Program mailing address

1300 West Park Street

Butte MT 59701 406-496-4153 tpatton@mtech.edu FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 {894bbcd6-bd74-45d3-a708-8e54cc04a559}