Selected geologic data for wells and test holes in and near the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Arnold, L.R.
Publication_Date: 2010
Title:
Selected geologic data for wells and test holes in and near the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 507
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geoligical Survey
Online_Linkage: <http://water.usgs.gov/lookup/getspatial?ds507_regolith_data>
Larger_Work_Citation:
Citation_Information:
Originator: Arnold, L.R.
Publication_Date: 2010
Title:
Geographic information datasets of regolith-thickness data, regolith-thickness contours, raster-based regolith thickness, and aquifer-test and specific-capacity data for the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado.
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 507
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Arnold, L.R., 2010, Geographic information datasets of regolith-thickness data, regolith-thickness contours, raster-based regolith thickness, and aquifer-test and specific-capacity data for the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado: U.S. Geological Survey Data Series 507.
Online_Linkage: <http://pubs.usgs.gov/ds/507/>
Larger_Work_Citation:
Citation_Information:
Originator: Arnold, L.R.
Publication_Date: 2010
Title:
Hydrogeology and steady-state numerical simulation of groundwater flow in the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado.
Series_Information:
Series_Name: U.S. Geological Survey Scientific-Investigations Report
Issue_Identification: 2010-5082
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Arnold, L.R., 2010, Hydrogeology and steady-state numerical simulation of groundwater flow in the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado: U.S. Geological Survey Scientific-Investigations Report 2010-5082.
Online_Linkage: <http://pubs.usgs.gov/sir/2010/5082/>
Description:
Abstract:
This point dataset contains geologic information concerning regolith thickness and top-of-bedrock altitude at selected well and test-hole locations in and near the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado. Data were compiled from published reports, consultant reports, and from lithologic logs of wells and test holes on file with the U.S. Geological Survey and the Colorado Division of Water Resources. The U.S. Geological Survey prepared this dataset in cooperation with the Colorado Geological Survey and the Lost Creek Ground Water Management District.
Purpose:
This dataset is 1 of 4 datasets (see cross references) developed in support of U.S. Geological Survey Scientific-Investigations Report 2010-5082. The purpose of this dataset is to provide information about regolith thickness and altitude of the top-of-bedrock surface underlying regolith in the Lost Creek Designated Ground Water Basin. Points in the dataset were used as the basis for preparing contour lines of equal regolith thickness shown in the dataset ds507_regthick_contours.
Supplemental_Information:
The Lost Creek Designated Ground Water Basin is an alluvial valley-fill aquifer in northeastern Colorado that is an important water source for irrigation, municipal, and domestic uses.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2010
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -104.566938
East_Bounding_Coordinate: -104.185506
North_Bounding_Coordinate: 40.305595
South_Bounding_Coordinate: 39.680017
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: inlandWaters
Theme_Keyword: aquifer
Theme_Keyword: regolith
Theme_Keyword: unconsolidated sediments
Place:
Place_Keyword_Thesaurus: Getty Thesaurus of Geographic Names
Place_Keyword: Lost Creek
Place_Keyword: Weld County
Place_Keyword: Adams County
Place_Keyword: Arapahoe County
Place_Keyword: Colorado
Stratum:
Stratum_Keyword_Thesaurus: Dictionary of Geologic Terms
Stratum_Keyword: groundwater
Stratum_Keyword: basin
Access_Constraints: None.
Use_Constraints: None.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: L.R. Arnold
Contact_Position: Hydrologist
Contact_Address:
Address_Type: mailing address
Address: Denver Federal Center
Address: P.O. Box 25046
Address: MS 415
City: Denver
State_or_Province: CO
Postal_Code: 80225-0046
Country: USA
Contact_Voice_Telephone: 1-888-275-8747 (1-888-ASK USGS)
Contact_Electronic_Mail_Address:
<http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ds507_regolith_data>
Security_Information:
Security_Classification_System: Department of the Interior
Security_Classification: Unclassified
Security_Handling_Description: Data are published and available online.
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3500
Cross_Reference:
Citation_Information:
Originator: Arnold, L.R.
Publication_Date: 2010
Title:
Contours of equal regolith thickness for the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 507
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geoligical Survey
Online_Linkage: <http://water.usgs.gov/lookup/getspatial?ds507_regthick_contours>
Cross_Reference:
Citation_Information:
Originator: Arnold, L.R.
Publication_Date: 2010
Title:
Raster-based regolith thickness of the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 507
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: <http://water.usgs.gov/lookup/getspatial?ds507_regthk>
Cross_Reference:
Citation_Information:
Originator: Arnold, L.R.
Publication_Date: 2010
Title:
Selected aquifer-test and specific-capacity data for wells in the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 507
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: <http://water.usgs.gov/lookup/getspatial?ds507_welltest_data>

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Regolith-thickness data were compiled from Bjorklund and Brown (1957), Nelson, Haley, Patterson, and Quirk, Inc. (1967), HRS Water Consultants, Inc., written commun. (2006), Hurr and others (1972), Skinner (1963), and lithologic logs from wells and test holes on file with the Colorado Division of Water Resources and the U.S. Geological Survey Colorado Water Science Center. In some places, weathered bedrock may have been mapped as regolith because of inaccurate lithologic logs or an indistinct contact between regolith and the underlying bedrock. In particular, lithologic logs of deep wells completed in bedrock were used to map regolith thickness in the southern part of the Lost Creek basin where few other data were available, and regolith thickness determined from these logs might not be accurate because they commonly lacked detailed regolith information.
Land-surface altitude was derived from information provided by the original source or estimated by using 1:24,000-scale topographic maps. Regolith thickness was estimated from lithologic logs or from information provided by the original data source specified in the SOURCE attribute field. Altitude of the top of bedrock was derived by subtracting regolith thickness from the land-surface altitude.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: unknown
Attribute_Accuracy_Explanation:
Accuracy of regolith-thickness data is variable depending on the accuracy of lithologic logs used to estimate regolith thickness.
Logical_Consistency_Report:
Point attributes for this dataset are consistent in meaning, although the attribute information was derived from multiple sources indicated in the SOURCE attribute. All points were processed by a single individual to ensure data consistency.
Completeness_Report:
Data were digitized and plotted manually on-screen based on location information provided by the original data source. Digital raster graphic topographic maps having a scale of 1:24,000 with a contour interval of 10 feet were used to determine approximate site locations. Site locations were plotted with consideration of existing structures (such as buildings, wells, and windmills), reported land-surface altitude, and reported distances from section lines. The eastern, western, and southern extent of the dataset is defined by the topographic boundary of the Lost Creek drainage basin The northern extent of the dataset is defined by an arbitrary line about one mile north of the northernmost limit of the Lost Creek Designated Ground Water Basin.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal accuracy is variable. Data were plotted using Public Land Survey System descriptions and 1:24,000 digital raster graphics. Data from the Colorado Division of Water Resources generally are assumed to be accurately located because, in most cases, they were plotted using reported distances from section lines. For other data, the locations generally were described to the nearest quarter-quarter-quarter section. Other locations were described to the nearest 4th or 5th quarter section. Some data descriptions, however, were only to the nearest quarter. Ancillary data, such as reported land-surface elevation and structures (such as buildings, wells, and windmills) shown on topographic maps were used to refine data locations. In cases where ancillary data were not available, data points were plotted near the center of the nearest quarter described by the data source.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 330
Horizontal_Positional_Accuracy_Explanation:
Maximum horizontal error is estimated as 1/2 section, or about 2,640 feet (only 1 point, SB00206215, potentially could be this inaccurate). However, horizontal accuracy of most points is estimated as better than about 330 feet (1/4, 1/4, 1/4 section). Accuracy is estimated on the basis of reported Public Land Survey System accuracy (number of quarters provided by original source).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Vertical accuracy of the top-of-bedrock altitude is variable depending on the accuracy of lithologic logs used to estimate regolith thickness and determine top of bedrock.
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: 5
Vertical_Positional_Accuracy_Explanation:
Vertical accuracy of the land-surface altitude is assumed to be within half a contour interval shown on 1:24,000-scale U.S. Geological Survey topographic maps, or 5 feet.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1957
Title:
Geology and ground-water resources of the lower South Platte River valley between Hardin, Colorado, and Paxton, Nebraska
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: U.S. Geological Survey Water-Supply Paper
Issue_Identification: 1378
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Bjorklund L.J.and Brown, R.F., 1957, Geology and ground-water resources of the lower South Platte River valley between Hardin, Colorado, and Paxton, Nebraska: U.S. Geological Survey Water-Supply Paper 1378, 431 p., 4 pls.
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1957
Source_Currentness_Reference: geologic condition
Source_Citation_Abbreviation: Bjorklund and Brown, 1957
Source_Contribution:
Source for well and test-hole locations and regolith-thickness information.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Nelson, Haley, Patterson, and Quirk, Inc.
Publication_Date: 1967
Title:
Ground water resources of the Lost Creek drainage basin, Weld, Adams, and Arapahoe Counties, Colorado
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: none
Issue_Identification: none
Publication_Information:
Publication_Place: unpublished
Publisher: unpublished
Other_Citation_Details:
Nelson, Haley, Patterson, and Quirk, Inc., 1967, Ground water resources of the Lost Creek drainage basin, Weld, Adams, and Arapahoe Counties, Colorado: Report prepared for the Colorado Ground Water Commission, 32 p., 3 pls.
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1967
Source_Currentness_Reference: geologic condition
Source_Citation_Abbreviation: NHPQ, 1967
Source_Contribution:
Source for well and test-hole locations and regolith-thickness information.
Source_Information:
Source_Citation:
Citation_Information:
Originator: HRS Water Consultants, Inc.
Publication_Date: 2006
Title: HRS Water Consultants, Inc., written communication
Series_Information:
Series_Name: none
Issue_Identification: none
Publication_Information:
Publication_Place: unpublished
Publisher: unpublished
Other_Citation_Details: HRS Water Consultants, Inc., written commun. (2006)
Type_of_Source_Media: written communication
Source_Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 1997
Single_Date/Time:
Calendar_Date: 1999
Source_Currentness_Reference: geologic condition
Source_Citation_Abbreviation: HRS, 2006
Source_Contribution:
Source for well and test-hole locations and regolith-thickness information.
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1972
Title:
Hydrogeologic characteristics of the valley-fill aquifer in the Weldona reach of the South Platte River valley, Colorado
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 73-127
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Hurr, R.T., Schneider, P.A., Jr., and others, 1972, Hydrogeologic characteristics of the valley-fill aquifer in the Weldona reach of the South Platte River valley, Colorado: U.S. Geological Survey Open-File Report 73-127, 2 p. 6 pl.
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1972
Source_Currentness_Reference: geologic condition
Source_Citation_Abbreviation: Hurr and others, 1972
Source_Contribution:
Source for well and test-hole locations and regolith-thickness information.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Colorado Agricultural Experiment Station
Publication_Date: 1963
Title:
Artificial ground-water recharge in the Prospect Valley area, Colorado
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: General Series
Issue_Identification: 792
Publication_Information:
Publication_Place: Fort Collins
Publisher: Colorado Agricultural Experiment Station
Other_Citation_Details:
Skinner, M.M., 1963, Artificial groundwater recharge in the Prospect Valley area, Colorado: Colorado Agricultural Experiment Station General Series 792, 89 p.
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1963
Source_Currentness_Reference: geologic condition
Source_Citation_Abbreviation: Skinner, 1963
Source_Contribution:
Source for well and test-hole locations and regolith-thickness information.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Colorado Division of Water Resources
Publication_Date: Unpublished material
Title: Colorado Division of Water Resources well-permit database
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: none
Issue_Identification: none
Publication_Information:
Publication_Place: unpublished publicly available data
Publisher: unpublished publicly available data
Other_Citation_Details: Colorado Division of Water Resources well-permit database.
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2009
Source_Currentness_Reference: geologic condition
Source_Citation_Abbreviation: CDWR
Source_Contribution: Source for well locations and regolith-thickness information.
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: unknown
Title: U.S. Geological Survey well records
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: none
Issue_Identification: none
Publication_Information:
Publication_Place: unpublished publicly available data
Publisher: unpublished publicly available data
Other_Citation_Details:
U.S. Geological Survey well records, available from the Colorado Water Science Center. Some data from these records are published online.
Online_Linkage: <http://co.water.usgs.gov/Website/projects/viewer.htm>
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2009
Source_Currentness_Reference: geologic condition
Source_Citation_Abbreviation: USGS
Source_Contribution:
Source of well and test-hole locations and regolith-thickness information.
Process_Step:
Process_Description:
Data were manually digitized (on-screen) in the ArcMap editing environment based on location information provided by the original data source using, as a backdrop, 1:24,000 digital raster graphic topographic maps.
The following attributes were added to the point dataset: WELL_ID, LOCATION, LAND_ALT, THICKNESS, THICK_QLFR, BR_ALT, BR_QLFR, REMARK, and SOURCE. Regolith-thickness data were compiled from published sources, consultant reports, and lithologic logs of wells and test holes on file with the Colorado Division of Water Resources and the U.S. Geological Survey Colorado Water Science Center.
Source_Used_Citation_Abbreviation: Bjorklund and Brown, 1957
Source_Used_Citation_Abbreviation: NHPQ, 1967
Source_Used_Citation_Abbreviation: HRS, 2006
Source_Used_Citation_Abbreviation: Hurr and others, 1972
Source_Used_Citation_Abbreviation: Skinner, 1963
Source_Used_Citation_Abbreviation: CDWR
Source_Used_Citation_Abbreviation: USGS
Process_Date: 20091020
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: T:\Temp\xml62.tmp
Process_Date: 20100608
Process_Time: 14203800
Process_Step:
Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation:
U:\Lost_Creek\CGS_ASR\Datasets\Lost_Creek_datasets_060810\regolith_data
Process_Date: 20100609
Process_Time: 11002100
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: T:\Temp\xml29.tmp
Process_Date: 20100916
Process_Time: 12315800
Cloud_Cover: 0

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 749

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 13
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -105.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000000
Ordinate_Resolution: 0.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: National Geodetic Vertical Datum of 1929
Altitude_Resolution: 1
Altitude_Distance_Units: feet
Altitude_Encoding_Method: Implicit coordinate

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: ds507_regolith_data
Entity_Type_Definition: point
Entity_Type_Definition_Source: compiled by USGS from various sources
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: WELL_ID
Attribute_Definition:
Number used to identify well or test-hole site. For data where the SOURCE is CDWR, the WELL_ID refers to the well-permit number.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: Unique well identifier from various sources.
Attribute:
Attribute_Label: LOCATION
Attribute_Definition:
Describes site location by township, range, and section. For example, a site located at SC00206321ADB is located in the northwest quarter of the southeast quarter of the northeast quarter of section 21, Township 2 South, Range 63 West. The letter S at the beginning of the number indicates the site is referenced to the Sixth Principal Meridian. The letter C following S indicates the site is a south Township (a letter B following S would indicate a north Township). The eight digits following SC indicate Township number (002), Range number (063), and section (21). Letters following township, range, and section indicate quarter (A), quarter-quarter (D), and quarter-quarter-quarter (B) sections, respectively. The letters A, B, C, and D represent northeast, northwest, southwest, and southeast quarters, respectively.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Coded well identifier including Public Land Survey System (PLSS) information.
Codeset_Source: Department of the Interior
Attribute:
Attribute_Label: LAND_ALT
Attribute_Definition:
Land-surface altitude, in feet. If not provided by the original data source, land-surface altitude was estimated by using digital raster graphic (DRG) topographic maps having a scale of 1:24,000 with a contour interval of 10 feet. Altitudes estimated from DRG topographic maps are in feet and referenced to the National Geodetic Vertical Datum of 1929 (NGVD29). Vertical datum for altitudes provided by the original data source is unknown.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: Altitude of land surface at well location.
Attribute:
Attribute_Label: THICKNESS
Attribute_Definition:
Thickness of the regolith (unconsolidated sediments) estimated from lithologic logs or provided by the original data source. Thickness is in feet.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: Regolith thickness, in feet.
Attribute:
Attribute_Label: THICK_QLFR
Attribute_Definition:
Thickness qualifier. Some wells or test holes did not extend to bedrock. Therefore, total regolith thickness could not be estimated at these sites. The abbreviation GT indicates that estimated thickness is greater than that shown in THICKNESS
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: GT
Enumerated_Domain_Value_Definition:
Greater than - actual thickness of unconsolidated sediments is greater than the THICKNESS field value because the well did not extend to bedrock.
Enumerated_Domain_Value_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: null entry
Enumerated_Domain_Value_Definition:
THICKNESS field value can be used as is without qualifier because well did extend to bedrock.
Enumerated_Domain_Value_Definition_Source: USGS
Attribute:
Attribute_Label: BR_ALT
Attribute_Definition:
The altitude, in feet, of the top-of-bedrock surface underlying the regolith was calculated by subtracting regolith thickness from land-surface altitude. Top-of-bedrock altitude is in feet above mean seal level and in the NGVD 1929 (National Geodetic Vertical Datum of 1929).
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: Altitude of top of bedrock, in feet.
Attribute:
Attribute_Label: BR_QLFR
Attribute_Definition:
Bedrock-altitude qualifier. Some wells or test holes did not extend to bedrock. Therefore, actual top-of-bedrock altitude could not be estimated at these sites. The abbreviation LT indicates that estimated top-of-bedrock altitude is less than that shown in BR_ALT.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: LT
Enumerated_Domain_Value_Definition:
Less than - top-of-bedrock altitude is less than the value in BR_ALT field because hole did not extend to bedrock.
Enumerated_Domain_Value_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: null entry
Enumerated_Domain_Value_Definition:
BR_ALT- top-of-bedrock altitude field value can be used as is without qualifier because well extended to bedrock.
Enumerated_Domain_Value_Definition_Source: USGS
Attribute:
Attribute_Label: REMARK
Attribute_Definition:
Additional information related to the site, particularly to the information used from the data source.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: Comments text field having multiple possible values.
Attribute_Measurement_Frequency: None planned
Attribute:
Attribute_Label: SOURCE
Attribute_Definition: Source of data.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Bjorklund&Brown, 1957
Enumerated_Domain_Value_Definition:
from Bjorklund, L.J., and Brown, R.F., 1957, Geology and ground-water resources of the lower South Platte River valley between Hardin, Colorado, and Paxton, Nebraska: U.S. Geological Survey Water-Supply Paper 1378, 431 p., 4 pls.
Enumerated_Domain_Value_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: CDWR
Enumerated_Domain_Value_Definition: Colorado Division of Water Resources well-permit database.
Enumerated_Domain_Value_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: HRS, 2006
Enumerated_Domain_Value_Definition: HRS Water Consultants, Inc., written commun. (2006)
Enumerated_Domain_Value_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Hurr&others,1972
Enumerated_Domain_Value_Definition:
Hurr, R.T., Schneider, P.A., Jr., and others, 1972, Hydrogeologic characteristics of the valley-fill aquifer in the Weldona reach of the South Platte River valley, Colorado: U.S. Geological Survey Open-File Report 73-127, 2 p. 6 pl.
Enumerated_Domain_Value_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: NHPQ, 1967
Enumerated_Domain_Value_Definition:
Nelson, Haley, Patterson, and Quirk, Inc., 1967, Ground water resources of the Lost Creek drainage basin, Weld, Adams, and Arapahoe Counties, Colorado: Report prepared for the Colorado Ground Water Commission, 32 p., 3 pls.
Enumerated_Domain_Value_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Skinner, 1963
Enumerated_Domain_Value_Definition:
Skinner, M.M., 1963, Artificial ground-water recharge in the Prospect Valley area, Colorado: Colorado Agricultural Experiment Station General Series 792, 89 p.
Enumerated_Domain_Value_Definition_Source: USGS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: USGS
Enumerated_Domain_Value_Definition:
Well records on file with the U.S. Geological Survey Colorado Water Science Center.
Enumerated_Domain_Value_Definition_Source: USGS
Overview_Description:
Entity_and_Attribute_Overview:
Attributes of the dataset include the well identifier, location, land-surface altitude, thickness of regolith (unconsolidated sediments) estimated from lithologic logs or provided by the data source, a calculated top-of-bedrock altitude, remarks, and data source.
Entity_and_Attribute_Detail_Citation:
Arnold, L.R., 2010, Geographic information datasets of regolith-thickness data, regolith-thickness contours, raster-based regolith thickness, and aquifer-test and specific-capacity data for the Lost Creek Designated Ground Water Basin, Weld, Adams, and Arapahoe Counties, Colorado: U.S. Geological Survey Data Series 507.

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Ask USGS
Contact_Position: Ask USGS -- Water Webserver Team
Contact_Address:
Address_Type: mailing address
Address: 445 National Center
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 1-888-275-8747 (1-888-ASK-USGS)
Contact_Electronic_Mail_Address:
<http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ds507_regolith_data>
Resource_Description: Downloadable Data
Distribution_Liability:
Although this dataset 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 these 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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: shapefile
Format_Version_Number: ArcGIS 9.3
Format_Specification: shapefile
File_Decompression_Technique: no compression applied
Transfer_Size: 156 KB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://water.usgs.gov/GIS/dsdl/ds507_regolith_data.zip>
Online_Computer_and_Operating_System: NA
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: ISO-9660
Fees: None. This dataset is provided by USGS as a public service.
Ordering_Instructions: <http://ask.usgs.gov/>
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2010

Metadata_Reference_Information:
Metadata_Date: 20100811
Metadata_Review_Date: 20091030
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Ask USGS
Contact_Position: Ask USGS -- Water Webserver Team
Contact_Address:
Address_Type: mailing address
Address: 445 National Center
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 1-888-275-8747 (1-888-ASK-USGS)
Contact_Electronic_Mail_Address:
<http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ds507_regolith_data>
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

Generated by mp version 2.9.6 on Thu Sep 16 12:32:32 2010