Public Water System Facilities in Wyoming at 1:100,000
Dataset Identification:
Resource Abstract:
NOTE: RESTRICTED DATA. Contact the Wyoming Department of Environmental Quality for access http://deq.state.wy.us/wqd/. This
database contains information on over 900 public water supplies in Wyoming, including location data (some locations collected
with GPS), and enforcement and compliance tracking related to regulation compliance to the Safe Drinking Water Act. The database
was compiled in dBase format, containing latitude and longitude fields which allows it to be easily converted by a GIS into
a spatial database. It is currently distributed in ArcView shapefile and ARC/INFO coverage export format, though these versions
may not be as up-to-date as the database in dBase format. Contact Wyoming's Dept. of Environmental Quality (Cheyenne, Wyoming)
for access to the data and for information about updates.Other sections: Spatial Data Organization: Direct_Spatial_Reference_Method:
VectorPoint_and_Vector_Object_Information: SDTS_Terms_Description:SDTS_Point_and_Vector_Object_Type: pointPoint_and_Vector_Object_Count:
1008Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution:.001Longitude_Resolution:
.001 Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model:Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name:GRS1980
Semi-major_Axis: 6378137Denominator_of_Flattening_Ratio: 298.2572221Entity_and_Attribute_Information: Overview_Description:Entity_and_Attribute_Overview:
Two specific tables from the Safe Drinking Water Program Database were used in reference to Wyoming. First was the system
table which provides the foundation for the Database. This table contains the descriptive variables relating to each system,
including the system's general locale (town, county, state), the system owner(s) or contact, type of system, activity of system,
population the system serves, etc. The unique identifier for this table is the system identification number. This field is
found in all other tables and is the direct link between each. The second table utilized for this project was the sources
table. It contains the descriptive variables relating to the source or sources for each system: location (latitude/longitude
and legal description), source type (groundwater or surface water), name of source, etc. This table uses a double-field unique
identifier which is tied to the system identification number and the source identification number. This is necessary due to
sources having a unique source identification number that relates only to each respective system. The values for all the fields
in these two tables are contained in the appendices to the PWS final report (see citation below).For the shapefile and coverage
formats, the systems table was joined to the sources so that all the information is combined.Entity_and_Attribute_Detail_Citation:
Oakleaf, J.R. and J.D. Hamerlinck, 1996. Global Positioning System-Based Mapping of Public Water System Facilities in Wyoming.
Final report, WWRC-96-13. Wyoming Water Resources Center, Univ. of Wy., Laramie, Wyoming.
Citation
Title Public Water System Facilities in Wyoming at 1:100,000
publication Date
1996-01-01T12:00:00
cited responsible party
-
originator
organisation Name
Department of Environmental Quality; DEQ
other Citation Details
Cinergi keyword enhanced.File generated at Wed Jun 27 22:52:43 UTC 2018
purpose:
The purpose of this database is to provide location information on all public water system facilities in Wyoming, in order
to help USEPA to meet the Safe Drinking Water Act's mandate to enforce and monitor regulation compliance of public water systems.
In recognition of the U.S. Environmental Protection Agency's (USEPA) recently adopted ground-water protection strategy, the
Water Quality Division (WQD) of the Wyoming Department of Environmental Quality DEQ) has placed a priority on the development
of a spatially-referenced database for the coordinate locations of all groundwater-based sources (i.e., wellhead and springs)
for community and noncommunity public water system (PWS) facilities in Wyoming. Additionally, in order to plan and implement
groundwater quality protection programs, such as the Wyoming State Wellhead Protection Program, there is a need to assemble
readily available digital data related to PWS facilities and sources. A substantial amount of work has already been directed
toward this goal by the USEPA through the development of the Safe Drinking Water Program Database. This relational database
has an assortment of tables associated with PWS systems, including (representing): identification information, locational
information, construction information, permit tracking, inspection/operation information, and enforcement/compliance tracking.
In September of 1995, the Wyoming Department of Environmental Quality, Water Quality Division (WDEQ/WQD) contracted with the
Wyoming Water Resources Center (WWRC) (now the Wyoming Geographic Information Science Center) at the University of Wyoming
to establish locations for a portion of the remaining groundwater sources within the USEPA PWS database.
Resource language:
eng
Resource progress code:
completed
Resource Maintenance Information
maintenance or update frequency:
Constraints on resource usage:
Legal Constraints
Access Constraints
otherRestrictions
use constraint:
otherRestrictions
Other constraints
Access constraints: none. Use Limitation: The user should be aware that accuracy of locations in this database varies. Accuracy
of locations collected by GPS is recorded; accuracy of other locations is unknown.. Distribution Liability: The distributor
shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate
used described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor
described above and not indirectly through other sources which may have changed the data in some way. This data was developed
and is meant to be used at the 1:100,000-scale (or smaller scale) for the purpose of identifying public water system facility
locations in Wyoming. The distributor makes no claims for the data's suitability for other purposes.
Spatial representation type code:
vector
Resource extent
Geographic Extent
Geographic Bounding Box
westBoundLongitude
-111.36554566
eastBoundLongitude
-103.78380412
northBoundLatitude
44.99390988
southBoundLatitude
40.94479444
Temporal Extent
time Position
1996-01-01
Credits:
USEPA (source database), Jim Oakleaf and Jesse Stover: GPS collection and database development.
point of contact
-
pointOfContact
individual Name
organisation Name
Wyoming Department of Environmental Quality
position Name Water Quality Division
Contact information
Telephone
Voice 307-777-7781
Fax 307-777-5973
Address
122 West 25th Street, Herschler Building, 4th Floor-West, Cheyenne, Wyoming, 82001
Country USA
description The initial phase of this project involved first querying the system and source tables in order to create a list of collection
sites. It was necessary to determine which systems were still active, and of these systems, which had groundwater sources
that had not yet been located. Once this was completed, a list was created for each county containing contact, system, and
well information necessary to find the source. Owners/managers were contacted to obtain permission and help in locating the
source, and standards were established for certain critical settings within the receiver (see Positional Accuracy section
for more detail). A data dictionary was created, requiring the user to input the unique identifiers for each source (i.e.
system identification number, source identification number, and groundwater source (spring or well)). POST-PROCESSING: Once
the data had been downloaded, to improve the accuracy it was necessary to post-process or differentially correct the data.
In order to differentially correct GPS data collected in the field, the user must have access to base station GPS data and
post-processing software. For this project all base station data were obtained from the Casper BLM/UW station. A base station
is an eight to twelve channel GPS receiver placed on a known location which produces correction files that can be applied
to any data collected within a 300 mile radius of the station. Correction files can be downloaded via a modem and use of a
bulletin board. Through the use of differential correction software these files can be applied to field data. Trimble's PFINDER
software with the MCORR400 algorithm was applied for all collected data. Finally, all corrected positions were averaged to
produce a single latitude and longitude for each groundwater source. DATA TRANSFER: The final step in data collection is to
transfer all the groundwater source locations back to the original table to be included with all PWS sources. This was accomplished
through the use of PFINDER's export command and then combining all database tables to form a single table relating only to
the locations collected by WWRC. This table was then related to the original source table allowing for all collected latitudes
and longitudes to be placed respectively within the table.
Processing Step
date and time 1996-01-01T12:00:00
description Once the PWS coordinate values were collected, post-processed, and transferred to a table, it became necessary to modify the
source and system tables to accommodate additional fields. The source table was significantly altered to fall in compliance
with standards established by the Definitions for the Minimum Set of Data Elements for Ground Water Quality. Although USEPA's
Safe Drinking Water Program Database followed these standards, this project included the use of only the system and source
tables which together would serve as a "stand alone" Wyoming PWS geographic information system database. The majority of the
supplemental elements aided in describing the methods and errors associated with data gathering techniques. Additionally,
some fields were developed that specifically relate to this project. The system table has only one addition being the UW_UPDATE
field. The source table has a multitude of changes. The most apparent of these changes is the additional latitude and longitude
fields. The original database had a field for degrees, minutes, seconds for both latitude and longitude. For GIS conversion
however, it was necessary to create a field that had each coordinate in decimal degrees. This allowed for the source table,
the decimal degrees fields specifically, to be used in creating a spatial database. One other notable field is the REASON
code which describes why the groundwater source was not located during this project or if it was a new source not listed in
USEPA's database.
Processing Step
date and time 1999-01-01T12:00:00
description Forty records from the database, representing surface water intake locations, were removed from the publicly-distributed data
set at the request of Wyoming Dept. Environmental Quality/ Water Quality Division.
Processing Step
date and time 2008-11-12T12:00:00
description Dataset copied.
source
source citation
Title M: GeoLibrary WyomingGeoLibraryBackup_coal2 DocumentsBySource TEMP wy_deq public_water_supply_facilities_in_wyoming_100k
source
source description
Source Contribution: source of information on public water system facilities digital database
source citation
Title USEPA Safe Water Drinking Program Database
publication Date
1996-01-01T12:00:00
cited responsible party
-
originator
organisation Name
USEPA
Contact information
Address
electronic Mail Address
Resource extent
Temporal Extent
begin 1986-01-01T12:00:00
end 1996-01-01T12:00:00
Completeness Omission
evaluation Method Description
The primary objective was to obtain and record latitude and longitude coordinates for up to 80% of the PWS groundwater sources
contained within USEPA's Safe Drinking Water Program Database that had not been previously mapped. From USEPA's Safe Water
Drinking Act Program Database source table 511 active groundwater sources were lacking latitude and longitude descriptors.
Of these, 419 were located by this project with an additional 59 new sources added to the table. These additions to the database
were operational or partially completed wells not listed within USEPA's database and, according to the PWS contact, were or
going to be part of that system. There were a number of different reasons why 92 of the 511 listed sources were not located,
however the biggest factor was dictated by the time and travel schedule during the data collection phase of the project. Every
county throughout Wyoming except Campbell County was visited by a WWRC employee. Campbell County was excluded due to the number
of mining PWSs (mines require safety training be completed before data can be collected within the permit area) and pre-existing
data in the Gillette area which was collected by the State Engineer's Office. This county contributed to nearly half of the
groundwater sources that currently lack locations and should be the focus of future data collection efforts.
ConceptualConsistency
measure Description
Does not apply, point locations only.
QuantitativeAttributeAccuracy
name Of Measure Quantitative Attribute Accuracy Assessment
measure Description
none
evaluation Method Description
Although the main focus of this project was centered around locating groundwater sources, the initial work involved updating
the system table. This was accomplished by distributing a "letter of intent" and a questionnaire to owners/managers of all
systems containing at least one water source utilizing groundwater. The purpose of this mailing was two-fold: 1) obtain specific
well information, and 2) update the contact information (i.e. contact name, address, and phone number). Additionally, the
letter gave PWS owner(s) and/or manager(s) an understanding of the project's purpose and scope before being contacted by a
WWRC employee. Systems to be surveyed were identified by querying both the system and source tables, to find all active systems
with at least one groundwater source. In total, 1000+ individual groundwater source questionnaires were mailed to nearly 800
PWS systems meeting this criteria. Response to the survey approached 50% with approximately 400 system owners/managers replying.
Information obtained from the returned questionnaires was then used to check and update changes to the system table.
notes: This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard, version
FGDC-STD-001-1998 using the August 2011-REH version of the FGDC CSDGM to ISO 19115-2 transform modified and updatated by SMR
2018-05-26 to work with xslt v1.0; generates USGIN compatible ISO19139 XML. Most recent metadata content review date: indeterminate:
Metadata contact
-
pointOfContact
individual Name
organisation Name
Wyoming Geographic Information Science Center
position Name Data Manager
Contact information
Telephone
Voice 307-766-2532
Fax
Address
Dept. 4008, 1000 E. University Ave., Laramie, Wyoming, 82071
Country USA