Prepared in cooperation with the Bureau of Land Management

Groundwater Well Inventory and Assessment in the Area 

of the Proposed Normally Pressured Lance Natural Gas 

Development Project, Green River Basin, Wyoming, 2012

Data Series 770

U.S. Department of the Interior

U.S. Geological Survey
Front cover. Windmill on stock well, Sublette County, Wyoming, June 2012. Photograph by Michelle L. Taylor.

Back cover. Stock well with solar-powered pump, Sublette County, Wyoming, June 2012. Photograph by Audrey Plenty Hoops.
Groundwater Well Inventory and 

Assessment in the Area of the Proposed 

Normally Pressured Lance Natural Gas 

Development Project, Green River Basin, 

Wyoming, 2012

By Michael J. Sweat

Prepared in cooperation with the Bureau of Land Management

Data Series 770

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

SALLY JEWELL, Secretary

U.S. Geological Survey

Suzette M. Kimball, Acting Director

U.S. Geological Survey, Reston, Virginia: 2013

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Suggested citation:

Sweat, M.J., 2013, Groundwater well inventory and assessment in the area of the proposed Normally Pressured 

Lance natural gas development project, Green River Basin, Wyoming, 2012: U.S. Geological Survey Data Series 770, 

27 p., http://pubs.usgs.gov/ds/770/.
iii

Acknowledgments

EnCana Oil & Gas (USA) is thanked for its cooperation and participation during this project. 

Specifically, the use of the Jonah Workforce Facility and access to EnCana leases is appreciated, as is contact with local grazing leaseholders. Local ranchers with grazing leases 

in the area are thanked for providing information about the location and status of groundwater wells, especially Pete Arambel of Midland Land and Livestock and John Erramouspe 

of G & E Livestock, Inc.
iv

Contents

Acknowledgments........................................................................................................................................iii

Abstract...........................................................................................................................................................1

Introduction.....................................................................................................................................................1

Description of Study Area ...................................................................................................................1

Purpose and Scope ..............................................................................................................................3

Methods...........................................................................................................................................................3

Well Screening......................................................................................................................................3

Field Reconnaissance..........................................................................................................................5

Results .............................................................................................................................................................8

Quality Control.......................................................................................................................................9

Summary..........................................................................................................................................................9

References Cited..........................................................................................................................................11

Figures

1. Map showing location of Normally Pressured Lance natural gas development

project area and U.S. Geological Survey study area, Green River Basin, Wyoming ........2

2. Photographs illustrating an easily located well, a well with existing pump and

storage tank, additional identifying information found at some wells, and typical

access for water-level measurement .......................................................................................7

3. Example field form used to document the assessment of and information about

each well......................................................................................................................................12

4. Photograph illustrating a flowing well ......................................................................................9

5. Map showing location of credible/suitable wells and candidate credible/suitable

wells located within the U.S. Geological Survey study area...............................................10

Tables

1. Credible/suitable well screening requirements to establish a groundwater site

developed by AMEC Geomatrix (2009) for the Pinedale Anticline Project Area

producers.......................................................................................................................................4

2. U.S. Geological Survey minimum set of data elements to establish a 

groundwater site...........................................................................................................................5

3. Number of wells visited, preliminary aquifer assignment, and results of field visit..........6

4. Summary of candidate credible/suitable wells visited in the study area, 2012 ...............20
v

Conversion Factors

Inch/Pound to SI

Multiply By To obtain

Length

mile (mi) 1.609 kilometer (km)

foot (ft) 0.3048 meter (m)

Area

acre 4,047 square meter (m2)

acre 0.4047 hectare (ha)

acre 0.4047 square hectometer (hm2) 

acre 0.004047 square kilometer (km2)

section (640 acres or 

1 square mile)

259.0 square hectometer (hm2) 

square mile (mi2) 259.0 hectare (ha)

square mile (mi2) 2.590 square kilometer (km2) 

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).

Abbreviations

BLM Bureau of Land Management

EnCana EnCana Oil & Gas (USA) Inc.

GPS global-positioning system

GWSI Groundwater Site Inventory (U.S. Geological Survey database)

JIDP Jonah Infill Development Project

N North

NPL Normally Pressured Lance

PAPA Pinedale Anticline Project Area

PFO Bureau of Land Management Pinedale Field Office

PHC petroleum hydrocarbons

QC quality control

R Range

RSFO Bureau of Land Management Rock Springs Field Office

T Township

USGS U.S. Geological Survey

W West

WDEQ Wyoming Department of Environmental Quality

WSEO Wyoming State Engineers Office

Groundwater Well Inventory and Assessment in the Area 

of the Proposed Normally Pressured Lance Natural Gas 

Development Project, Green River Basin, Wyoming, 2012

By Michael J. Sweat

Abstract

During May through September 2012, the U.S. Geological Survey, in cooperation with the Bureau of Land 

Management, inventoried and assessed existing water wells 

in southwestern Wyoming for inclusion in a possible groundwater-monitor network. Records were located for 3,282 wells 

in the upper Green River Basin, which includes the U.S. Geological Survey study area and the proposed Normally Pressured Lance natural gas development project area. Records for 

2,713 upper Green River Basin wells were determined to be 

unique (not duplicated) and to have a Wyoming State Engineers Office permit. Further, 376 of these wells were within 

the U.S. Geological Survey Normally Pressured Lance study 

area. Of the 376 wells in the U.S. Geological Survey Normally 

Pressured Lance study area, 141 well records had sufficient 

documentation, such as well depth, open interval, geologic 

log, and depth to water, to meet many, but not always all, 

established monitor well criteria. Efforts were made to locate 

each of the 141 wells and to document their current condition. Field crews were able to locate 121 of the wells, and the 

remaining 20 wells either were not located as described, or 

had been abandoned and the site reclaimed. Of the 121 wells 

located, 92 were found to meet established monitor well criteria. Results of the field efforts during May through September 

2012, and specific physical characteristics of the 92 wells, are 

presented in this report.

Introduction

Groundwater is the primary source of water supply for 

rural livestock, domestic, and industrial uses in the Green 

River Basin in southwestern Wyoming (Clarey and others, 

2010). In April 2011, EnCana Oil & Gas (USA) Inc. (EnCana) 

filed a scoping notice [EnCana Oil & Gas (USA) Inc., 2011] 

with the Bureau of Land Management (BLM) for development of the Normally Pressured Lance (NPL) natural gas 

development project area, hereafter referred to as the NPL 

project area. The BLM then filed a notice of intent to prepare 

an environmental impact statement for the NPL natural gas 

development project in Sublette County, Wyoming (Bureau 

of Land Management, 2011). The notice of intent outlines a 

gas development project consisting of 3,500 wells installed 

within an area of 141,080 acres, with production from the Late 

Cretaceous-age Lance Formation at a depth from 6,500 to 

13,500 feet (ft) below land surface, where gas is under normal 

formation pressure conditions.

As part of the public-involvement process, the BLM and 

the Wyoming Department of Environmental Quality (WDEQ) 

asked the U.S. Geological Survey (USGS) to inventory 

groundwater information for the NPL project area. During 

May through September 2012, in cooperation with the BLM, 

the USGS inventoried, verified, and assessed well records for 

the upper Green River Basin, an area that includes the NPL 

project area (fig. 1), for inclusion in a possible groundwatermonitor network. Field verification of well conditions and 

water levels was completed for a subset of wells in the vicinity 

of NPL project area.

Description of Study Area

The NPL project area (fig. 1) is located about 68 miles 

(mi) northwest of Rock Springs, Wyoming, and about 25 mi 

south of Pinedale, Wyoming, and covers approximately 

141,080 acres administered by the BLM Pinedale Field Office 

(PFO) and the BLM Rock Springs Field Office (RSFO). The 

NPL project area consists of all or parts of 233 sections in 

Township (T) 27 North (N) Range (R) 107 West (W) through 

R109W, T28N R107W through R110W, and T29N R108W 

through R110W. The NPL project area is adjacent to the Jonah 

Infill Development Project (JIDP) in Sublette County, which 

also is an EnCana gas development project on BLM lands. 

No incorporated, permanently inhabited areas are within the 

NPL project area, although EnCana has a workforce facility 

adjacent to the JIDP that can house 296 people. This facility 

includes dedicated water supply and wastewater treatment 

facilities.
2 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

Map area

80

90

25

189

191

Green River Basin

WYOMING

Rock Springs

Eighteenmile

Canyon

Buckhorn Canyon

Big Piney Creek

Fontenelle

 Reservoir

River

Big Sandy 

Reservoir

Big

Sandy

River

Big Sandy

River

Little Sandy

River

La Barge

Creek

Creek

Fontenelle

Green

River

Green

Cottonwood

Creek

River

Fork New

Boulder

Lake

Fork

East

Fork

New

River

Eden

Farson

Big Piney

Boulder

Pinedale

T

24

N 

T

32

N 

T

33

N 

R 114 W R 106 W

Fontenelle

 Reservoir

Reservoir

189

T

31

N 

T

28

N 

T

29

N 

T

30

N 

110°15’ 110°0’ 109°45’ 109°30'

42°45’

42°30’

42°15’

0 5 10 15 MILES

0 5 10 15 KILOMETERS

T

25

N 

T

26

N 

T

27

N 

28

R 113 W R 112 W R 111 W R 110 W R 109 W R 108 W R 107 W

U.S. Geological Survey 

study area boundary

Normally Pressured Lance 

(NPL) natural gas development project boundary

Jonah Infill Development 

Project boundary

Land surface administration

Bureau of Land Management

Bureau of Reclamation

Forest Service

Private

State

EXPLANATION

191

191

353

351

235

189 LINCOLN COUNTY

SWEETWATER COUNTY

SUBLETTE COUNTY

Base from U.S. Geological Survey, variously dated,

various scales 

Albers Equal-Area Conic projection

Standard parallels 29°30’N and 45°30’N

Central meridian 111°00’W

Land surface administration data from

Bureau of Land Management, 2007

Big Sandy 

Reservoir

Figure 1. Location of Normally 

Pressured Lance (NPL) natural 

gas development project area and 

U.S. Geological Survey study area, 

Green River Basin, Wyoming.
Methods 3

To account for groundwater movement through the 

NPL project area, a study area was established between the 

Green River, the Big Sandy River, and U.S. Highway 191, 

and between State Highway 351 and an east-west line 12 mi 

south of the Sublette and Sweetwater County line, between the 

Green and Big Sandy Rivers. This area forms the USGS study 

area and covers approximately 702,000 acres. 

The study area consists of sage brush steppe, and as 

such includes critical habitat (Duke and others, 2011) for the 

Greater Sage-Grouse (Centrocercus urophasianus), elk (Cervus elaphus), pronghorn (Antilocapra americana), mule deer 

(Odocoileus hemionus), and feral horses (Equus caballus). 

Many other plant and animal species also are present in the 

area. Most of the land surface is federally owned and is administered by the BLM; as such, one of the primary land uses 

within the study area is livestock grazing. Most water wells in 

the study area provide water for livestock.

Purpose and Scope

The purpose of this report is to present an inventory and 

assessment of existing wells in the study area that was made 

during May through September 2012. These wells may be 

suitable for inclusion in a groundwater-monitor network in the 

NPL project area and the USGS study area. 

The scope of the report includes a description of credible and suitable well criteria, and data objectives for different 

monitoring purposes, including depth of the well, depth to 

top of open interval, length of open or screened interval, and 

geologic formation or unit in which the well is completed. 

Methods

The methods used include physical and electronic records 

searches, screening of wells based on published criteria 

required by BLM for establishment of a monitor well, and 

field reconnaissance to physically verify well location, access, 

depth, and measurement of depth to water. Screened intervals 

were determined from well completion records on file with the 

Wyoming State Engineers Office (WSEO). This information 

was assessed to determine suitability of each well for use in a 

monitor network.

Well Screening

Physical and digital groundwater well records were 

accessed from files and databases maintained by the WSEO, 

BLM field offices, Pinedale Anticline Project Area (PAPA) 

producers, and the USGS Groundwater Site Inventory 

(GWSI) database (U.S. Geological Survey, 2004). Records 

of groundwater wells from BLM, PAPA producers, and 

USGS sources included 3,282 wells in the upper Green River 

Basin. These records were compared against the WSEO 

well-permit database, and only those wells with WSEO permits (2,713 unique records) that were within the USGS study 

area (376 wells) were selected for assessment for inclusion in 

a possible groundwater-monitor network. 

Records for the 376 wells were then screened according to the credible/suitable well screening matrix presented in 

AMEC Geomatrix (2009) and to the USGS Office of Groundwater site establishment specifications published in Cunningham and Schalk (2011), and were used to identify wells that 

would be suitable for use in a monitor network.

Credible/suitable well screening information developed 

by AMEC Geomatrix (2009) for the PAPA producers is listed 

in table 1. USGS minimum data elements required to establish a groundwater site are listed in table 2 (Cunningham and 

Schalk, 2011). In general, critical information is available 

for many existing wells that is common to all data objectives described in the credible/suitable well screening matrix 

(table 1) and that meets the minimum set of data elements 

required to establish a groundwater site (table 2); however, 

existing wells are unlikely to meet all of the credible/suitable criteria set forth for every data objective because some 

of the information needed to meet the criteria is not routinely 

reported by drillers upon well completion (amec, 2012). 

Within the USGS study area, 376 wells with WSEO permits were identified. The records for each of these wells were 

then assessed using the criteria established by AMEC Geomatrix (2009) and the USGS (Cunningham and Schalk, 2011). A 

total of 141 existing well records were found that contained 

sufficient information to meet the AMEC Geomatrix (2009) 

criteria common to all data objectives and the specific criteria 

necessary to (1) characterize horizontal flow in the aquifer 

in which they were completed (data objective 1; table 1), 

(2) monitor groundwater levels and characterize vertical flow 

between hydrostratigraphic units (data objective 2; table 1), 

and (3) monitor water-quality impacts (data objectives 5 and 

6; table 1) from oil and gas activities.

Specifically, information about these wells generally 

included information about the original depth of the well, the 

open or screened interval(s) of the well, the type of surface 

seal, and depth to water at the time of completion of the well. 

This information is sufficient to describe general groundwater 

conditions in an area such as the potentiometric surface, and 

to allow for the collection of groundwater-quality samples 

representative of the aquifer(s) in which the well(s) is completed. With the collection of additional data, this information 

is sufficient to allow for the description of changes to this 

surface with time, and to describe local effects from activities 

such as pumping, 

Once the subset of 141 candidate wells was identified, 

USGS staff then developed a strategy to locate and document 

each of these wells. A local project folder was created for each 

well. The folder contained a copy of the well permit; drilling 

completion report(s), including driller’s log(s); and any previously collected data from the well, such as depth to water, 

physical properties of water measured in the field, waterquality sample results, aquifer test results, and well production 
4 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

Table 1. Credible/suitable well screening requirements to establish a groundwater site developed by AMEC Geomatrix (2009) for the 

Pinedale Anticline Project Area producers.

[BLM, Bureau of Land Management; <, less than; HSU, hydrostratigraphic unit; ft, foot; PHC, petroleum hydrocarbons; ≤, less than or equal to; USGS, 

U.S. Geological Survey; PAPA, Pinedale Anticline Producers Association]

Data objective Well selection criteria

Critical information common to all data 

objectives

Existing monitoring data collected in accordance with BLM requirements.

Well completion report available.

Lithology recorded on drillers log.

Geographic location known.

Casing reference elevation known or can be obtained.

Total depth known.

Casing sealed and depth of seal known.

Position of perforated interval known.

1. Characterize horizontal flow within an HSU Well accessible for water-level measurements.

Well perforated/screened in single hydrostratigraphic unit (HSU).

Well adequately sealed from adjacent HSU(s).

Perforated/screened interval <50 ft.

2. Characterize flow between HSUs (vertical 

gradients)

Well accessible for water-level measurements.

Well located <200 ft from companion well completed in different HSU.1

Well perforated/screened in single hydrostratigraphic unit (HSU) and adequately sealed.

Discrete perforated/screened inverval (<50 feet).

3. Characterize flow between groundwater and 

surface water

Well accessible for water-level measurements.

Well near river/stream.2

Well perforated/screened in single HSU.

Well located near an existing/planned streamgage.3

All criteria for objective 2 are met.1

4. Collect credible aquifer test data4 Well accessible for water-level measurements.

Perforated/screened interval in appropriate lithologic interval of target HSU.

Perforated intervals isolated from nontarget lithologies.

5. Monitor water-quality impacts from oil and 

gas activities—surface release

Well accessible for sampling.

Well is secure and access is controlled (for example, locking cap).5

No non-oil and gas PHC sources located in immediate vicinity.

Perforated/screened interval in uppermost HSU and brackets water table.

Perforated/screened interval ≤50 ft.

No prior PHC detections.6

6. Monitor water-quality impacts from oil 

and gas activities—excursion from 

drilling/operating gas wells

Well accessible for sampling.

Well located in Pinedale Field or immediately downgradient of field.7

Well is secure and access is controlled (for example, locking cap).5

No prior PHC detections.6

1

 Currently (2012) no well clusters exist that meet this criterion.

2

 Not all wells will meet this criterion; however, there are some wells on the margins of the study area that do.

3

 Currently (2012) no wells meet this criterion; however, in 2013, shallow wells are planned to be installed at USGS streamgages that are along the margins of 

the USGS study area. 4

 Aquifer tests are not routinely performed on livestock supply wells; wells selected for a monitor network could be slug tested to determine some aquifer 

properties. 5

 Wells in the USGS study area are not dedicated monitor wells and therefore generally do not have locking caps. Most have pumps in them and are used 

intermittently for water supply for livestock and wildlife. Dedicated project monitor wells would have to be installed to be able to secure them. 6

 In general, few water-quality analyses are available for the selected wells. This criterion would need to be established at the time of baseline sampling to 

determine if any wells meet this criterion. 7

 This PAPA criterion will be modified to state that the well must be located in either the Normally Pressured Lance (NPL) natural gas development project 

area or the USGS study area (Janet Bellis, Bureau of Land Management, oral commun., 2012).
Methods 5

Table 2. U.S. Geological Survey minimum set of data elements to establish a groundwater site.

[Minimum set of data elements based on Cunningham and Schalk (2011). GPS, global-positioning system; GWSI, Groundwater Site Inventory]

Data accuracy and limitations

1. Altitudes determined from topographic maps are accurate to within one-half the map contour interval; latitudes and longitudes are 

accurate to about 0.5 second.

2. Accuracy of latitude, longitude, and altitudes determined by use of GPS are dependent on each instrument’s capabilities.

3. The accuracy of the measuring point, land-surface datum, measuring point correction, and reference marks depends on the measurement 

method used. 

4. A graduated steel or electric tape commonly is accurate to 0.01 foot.

Assumptions

1. The groundwater site is established by a field visit. At times, a site is established without a field visit. In that instance, less information 

may be available to establish the site in GWSI.

2. A groundwater site is a single point, not a geographic area or property.

3. All information available for a site will be compiled and entered in GWSI. This includes data and information that are not mandatory for 

GWSI (U.S. Geological Survey, 2004).

4. A GPS unit, aerial photographs, remotely-sensed images, paper maps, or some combination of these resources, will be used to complete 

the location-based information needed for Form 9-1904-A (fig. 3). A U.S. Geological Survey (USGS) computer application is available 

for this task, which automates some of the steps in the procedure. Use of that application is encouraged, but it is not yet available for field 

use.

5. The hydrographer has gathered all of the information available about the well, including a well-construction log, geologic log, and owner 

information, and has permission to access the well.

Instructions

1. Locate the well as described in Cunningham and Schalk (2011).

2. Establish a permanent measuring point, land-surface datum, and nearby reference marks as described in Cunningham and Schalk (2011). 

3. Measure the total depth of the well as described in Cunningham and Schalk (2011).

4. Measure the water level in the well by using a steel tape or electric tape, as described in Cunningham and Schalk (2011).

5. Use the information collected before the field visit and the measurements collected during the field visit to complete every GWSI component (Form 9-1904-A, see fig. 3) for which you have information.

Data recording

Data are recorded in the field on the GWSI Groundwater Site Schedule (Form 9-1904-A, see fig. 3). Water levels also are recorded on the 

appropriate water-level measurement field form.

values. A map was created using the location information 

provided for each well. Well records were then sorted by the 

aquifer or geologic formation in which they seemed to be 

completed, determined from well completion reports, driller’s 

logs, and water-level records.

Field Reconnaissance

Field crews consisted of experienced USGS hydrologists 

assisted by student interns. The field crews were trained by a 

senior hydrologist in the specifics of locating and documenting 

groundwater wells based on procedures described in Cunningham and Schalk (2011). After field work was complete, 

a supervisory hydrologist checked all field records to verify 

well inventories were complete. Follow-up visits are planned 

in 2013 to further document wells for which water levels were 

not measured in 2012 because of well access issues.

Before attempting to locate and visit each well, ownership information was used to contact the owner of each well 

for permission to access the site and the well. In most cases 

(135), the BLM was the owner of the well. If the BLM well 

was considered part of a grazing lease, the current (2012) lessee was contacted and informed of the USGS’s need to access 

the site and the well. For privately owned wells (6), the owners were contacted by phone and permission was requested to 

access the site and the well. Site and well access was granted 

for all 141 well sites.

Using the project folder for each well, field crews 

attempted to physically locate each of the 141 candidate wells. 

Because the study area is in a remote part of the State that 

has sparse human habitation, many of the wells are located 

in areas that do not have maintained roads. For this reason, 

USGS obtained road and trail information from EnCana for 

use with global-positioning system (GPS) devices. Each 

morning, the field crew would identify target wells to locate 
6 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

for that day, and would determine the best route to each well 

using the GPS, paper maps, aerial photography, and remotelysensed images. In many cases, the most precise location 

information available was a quarter-quarter section (40 acres 

or 0.06 square mile). To overcome this limitation, a conversion 

from quarter-quarter section to latitude-longitude coordinates 

for the centroid of the quarter-quarter section was used to 

assist with navigation. This reduced the area of uncertainty for 

a well to 10 acres or 0.015 square mile in most cases.

From June through August of 2012, field visits were 

attempted at each of the 141 candidate wells that met initial 

criteria. Upon arriving at the reported well location, an attempt 

was made to locate and identify each well. Field crews were 

able to locate 121 of the wells (table 3) because the well was 

readily visible (examples are shown in figs. 2A, 2B) and the 

location information was correct. Upon arrival at each well, 

the field crew would assess the site for any safety considerations and would then begin to document the well by completing a detailed field form (fig. 3, at the back of the report). Photographs were taken of the well from each cardinal direction. 

Additional photographs were taken as needed to document 

the site, such as close-ups of any infrastructure and additional 

identifying information (fig. 2C).

The height of the well casing above land surface was 

measured and documented, and the well was then accessed 

to make a water-level measurement and to sound the well for 

total depth. In most cases water levels were measured with 

an electric tape (Cunningham and Schalk, 2011, p. 33–38) 

or a graduated steel tape (Cunningham and Schalk, 2011, 

p. 95–104). Access to measure water levels typically was 

through a small port provided in the well cap for this purpose 

(fig. 2D). In some cases, wells were not capped and access 

was directly into open casing. In other cases, typically those 

wells having windmills, a metal plate was over the well. Many 

of these metal plates did not have access ports, so they were 

lifted off the well casing using a jack or wedge, and the waterlevel measuring tape was inserted between the metal plate and 

the top of the well casing. For measurements made this way, 

the water-level measurement is slightly less accurate (approximately 0.01–0.03 foot) because the tape is not held vertically 

at the measuring point, and there is a slight curvature to the 

tape. Multiple water-level measurements were made until two 

successive measurements fell within the guidelines for accurate measurements (Cunningham and Schalk, 2011, p. 5–8 and 

33–38). Water levels were recorded on the site-specific field 

form (fig. 3). 

Table 3. Number of wells visited, preliminary aquifer assignment, and results of field visit.

[Shaded cells indicate candidate credible/suitable wells: blue, free flowing well; tan, candidate well that could not be accessed to measure water level; min, 

minimum; max, maximum; ft, feet; SS, sandstone; WL, water level]

Geohydrologic unit (min-max depth of wells in feet)

Total Alluvium 

(not reported–1,042 ft)

Laney 

Member of 

Green River 

Formation 

(26–385 ft)

Farson SS Member 

of Green River 

Formation/

Alkali Creek Tongue 

of Wasatch Formation 

(8–1,365 ft)

Wasatch-Fort Union aquifer

Unknown 

(not 

reported)

Wasatch 

Formation 

(155–1,573 ft)

Cathedral 

Bluffs Tongue 

of Wasatch 

Formation 

(150 ft)

New Fork 

Tongue of 

Wasatch 

Formation 

(55–500 ft)

Water-level 

measurement

1 10 421 61 0 0 0 59

Pumping WL 1 3 6 1 1 0 0 12

Flowing 2 1 1 4 0 0 0 8

No access; WL 

might be 

possible

0 1 6 2 0 2 2 13

Dry (to total depth 

or obstruction)

0 1 4 2 0 0 2 9

Plugged or sealed; 

abandoned

1 4 5 2 0 0 8 20

Could not locate 0 1 6 3 0 0 10 20

Total 5 21 70 20 1 2 22 141

1

 Two wells are completed in both the Farson SS Member of the Green River Formation/Alkali Creek Tongue of Wasatch Formation and the Wasatch 

Formation of the Wasatch-Fort Union aquifer, but are only counted in the Farson SS Member of the Green River Formation/Alkali Creek Tongue of 

Wasatch Formation.
Methods 7

Upon completing water-level measurements, the well was 

sounded to ascertain the total depth of the well. Each member 

of the field crew checked the depth, and the well depth was 

recorded on the site-specific field form (fig. 3). Measured 

well depths were checked against both permitted and report 

completion depths, and discrepancies noted.

Upon completion of in-hole measurements, the well 

was returned to the condition in which it was found and the 

field crew completed the remaining entries on the field form, 

including a site sketch, date and time of visit and water-level 

measurement, latitude and longitude measured on site with a 

field-grade GPS, and any other information the field crew felt 

was pertinent. Well elevations were assigned based on the well 

location plotted on a USGS 1:24,000-scale topographic map. 

Both EnCana and surface lessees asked USGS field crews to 

document any sightings of wildlife, including elk, horses, and 

raptors, and these observations were included in the field notes 

for any well location where sightings were made.

A B

C D

Photograph by Katharine Foster, U.S. Geological Survey. Photograph by Mike Sweat, U.S. Geological Survey.

Photograph by Michelle Taylor, U.S. Geological Survey. Photograph by Katharine Foster, U.S. Geological Survey.

Figure 2. Photographs illustrating: A, an easily located well; B, a well with existing pump and storage tank; C, additional identifying 

information found at some wells; and D, typical access for water-level measurement.
8 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

Results

Through an inventory of physical and digital well 

records, the USGS found 3,282 groundwater-well records 

for the upper Green River Basin. A total of 141 existing well 

records were found that contained sufficient information to 

meet the AMEC Geomatrix (2009) criteria common to all 

data objectives (table 1) and the specific criteria necessary 

to (1) characterize horizontal flow in the aquifer in which 

they were completed (data objective 1; table 1), (2) monitor 

groundwater levels and characterize vertical flow between 

hydrostratigraphic units (data objective 2; table 1), and 

(3) monitor water-quality impacts from oil and gas activities 

(data objectives 5 and 6; table 1). The USGS attempted to visit 

each of the 141 wells to verify the wells existence and condition, and to measure the water level. This section describes the 

wells that met credible/suitable criteria and the results of well 

field visits.

During the well-records search, information for each well 

was tabulated in a worksheet. Well records were screened on 

the basis of whether data required to meet credible/suitable 

criteria were available for each well. For many wells, some 

of the required information was not reported; however, using 

best professional judgment, USGS hydrologists determined 

these wells might meet criteria for some of the data objectives 

listed in table 1 and the wells were included in the study. The 

information that most commonly was missing from the records 

was depth to open interval(s) and depth to bottom of seal. 

Additionally, the perforated or screened intervals in most of 

the wells do not straddle (bracket) the water table (data objective 5; table 1), and the perforated or screened interval in many 

wells is not in a single hydrostratigraphic unit (data objectives 

1, 2, 3, and 5; table 1), because these wells were designed to 

produce water. Given these limitations, USGS determined 

that wells listed in table 4 (at the back of the report) might be 

credible/suitable monitor wells for data objectives 1, 2, 5, and 

6 (table 1).

For data objective 1 (table 1), wells in table 4 generally 

meet all well selection criteria, although many wells have perforated or screened (open) intervals greater than 50 ft. Many 

of these wells have multiple perforated or screened intervals, 

in which case packers could be used to isolate sections of 

aquifer less than or equal to 50 ft for measuring water levels 

from different hydrostratigraphic units.

For data objective 2 (table 1), wells in table 4 generally 

meet the first and third criteria; however, only two sites have 

multiple wells located within 200 ft of each other and completed in different hydrostratigraphic units. Without the installation of additional, dedicated monitor wells at other locations, 

this data objective is unlikely to be met as stated; however, the 

use of packers in wells with multiple perforated or screened 

intervals would allow for water levels to be measured at 

discrete vertical intervals within a well, which would provide 

data similar to multiple wells completed at different depths.

For data objectives 5 and 6, best professional judgment 

was used to include these wells. Because most of these wells 

are used for stock or other purposes, they have dedicated 

pumps installed, and generally are not locked or secured due 

to the remoteness of the area. Additionally, many have not 

been previously sampled for petroleum hydrocarbons (PHC), 

so it is not known if any of them might have detectable levels 

of PHC; however, given the information that is known about 

the wells, their location, and their current (2012) use(s), USGS 

believes that these wells could provide reliable data about 

water quality if they were to be sampled. For data objective 5, an arbitrary maximum depth of 200 ft for the top of the 

open interval (table 4) was selected for this report as a cut off 

beyond which surface spills are unlikely to be detected. Consultation with cooperators and additional site characterization 

would be needed to determine the suitability of any given well 

to meet data objective 5.

During field reconnaissance, 20 of the 141 wells the 

USGS attempted to visit could not be located (table 3). These 

20 wells could not be located due to either incorrect location 

information in the well records, or because the well had been 

abandoned or destroyed and no surface indication of the well 

could be found at the site. The 121 wells that were visited 

were found in many different conditions.

Static water levels were measured at 59 wells, and 

pumping water levels were measured at 12 wells. Eight of 

the located wells were free flowing (no pump) (tables 3 and 

4; fig. 4). Field crews noted the height and diameter of the 

discharge point; however, they did not have pressure gages 

or other tools with which to accurately measure water level. 

Flowing wells are planned to be revisited in 2013, and a pressure gage will be used to determine the actual height above 

the land surface to which water would rise. It is important to 

include flowing wells in the network because they offer valuable information about the rate and direction of vertical flow 

both in and between aquifers. No water-level measurement 

was attempted at 13 wells due to site conditions, but these are 

planned to be revisited in 2013 and water-level measurements 

will be attempted. Of the remaining 29 wells (table 3), 9 were 

located and found to be dry or obstructed, and 20 were located 

and found to be plugged or sealed, and abandoned. 

A total of 92 wells (fig. 5) were determined to either meet 

some credible/suitable criteria (79 wells) or to be candidate 

wells that might meet credible/suitable criteria (13 wells). 

The latter wells were located, but due to site conditions, a 

water-level measurement was not made or attempted during 

the initial field visit. These wells are planned to be revisited in 

2013 by a senior hydrologist who will attempt to measure both 

the depth to water and the total depth of the well. Access to 

measure water level would likely make these wells candidates 

for inclusion in a monitor well network.

Of the 79 wells found to meet credible/suitable criteria 

for determining potentiometric surface and water-quality 

(table 3), 4 were completed in alluvium, 14 were completed 
Summary 9

Figure 4. A flowing well. Photograph by Michelle L. Taylor, 

U.S. Geological Survey.

in the Laney Member of the Green River Formation, 49 were 

completed in the geohydrologic unit composed of the Farson 

Sandstone Member of the Green River Formation and the 

Alkali Creek Tongue of the Wasatch Formation, and 12 were 

completed in 3 different units of the Wasatch-Fort Union aquifer. Two wells completed in the geohydrologic unit composed 

of the Farson Sandstone Member of the Green River Formation and the Alkali Creek Tongue of the Wasatch Formation 

also have open intervals in the Wasatch Formation (table 3), 

and are reported as only for the Farson Sandstone Member 

of the Green River Formation/Alkali Creek Tongue of the 

Wasatch Formation.

Results of the field reconnaissance were entered into the 

USGS GWSI database and are presented in table 4 for those 

wells that met many, but not necessarily all, of the credible/

suitable criteria. Additional data for the wells are available 

from the USGS National Water Site Inventory Web page at 

http://nwis.waterdata.usgs.gov/wy/nwis/inventory by using the 

site numbers in table 4.

Quality Control

Collection of quality-control (QC) measurements is critical for evaluating the procedures and protocols used during 

field reconnaissance, as well as for providing confirmation of 

results. QC procedures for the well inventory and assessment 

consisted of having two people on each field crew, the use of a 

consistent, defined field form by all personnel (fig. 3), and following published protocols (Cunningham and Schalk, 2011). 

During water-level measurements, one person made the 

primary water-level determination and the second person made 

a confirmatory measurement. When determining GPS coordinates, one person read the GPS coordinates out loud to the 

second person who was taking the field notes; the note taker 

then read the coordinates back to the person with the GPS, 

who acknowledged or corrected the information. Protocols and 

QC procedures for the measurement of water levels that are 

described by Cunningham and Schalk (2011) were followed 

for this study. For wells that could not be located on the initial 

attempt, a second attempt was made by a different field crew.

Summary

During May through September 2012, the U.S. Geological Survey, in cooperation with the Bureau of Land 

Management, inventoried and assessed existing water 

wells in southwestern Wyoming for inclusion in a possible 

groundwater-monitor network. An inventory was made of 

water-well records for the upper Green River Basin, an area 

that encompasses the Normally Pressured Lance natural gas 

development project area. Records for 3,282 water wells were 

located in industry, local, State, and Federal databases. These 

records were matched against the Wyoming State Engineers 

Office well-permit database, and 2,713 unique (not duplicated) 

records were isolated. Of these unique records, 376 were 

located in the U.S. Geological Survey study area. Completion 

reports, well logs, and other ancillary data, as available, were 

reviewed for each of these 376 wells to determine wells that 

would meet selected data objectives for inclusion in a possible 

groundwater-monitor network. 

A total of 141 existing well records were found that 

seemed to meet the criteria common to all data objectives, 

and also met the specific criteria necessary to (1) characterize 

horizontal flow in the aquifer in which they were completed, 

(2) monitor groundwater levels and characterize vertical flow 

between hydrostratigraphic units, and (3) monitor water-quality impacts from oil and gas activities. 

In 2012, field crews attempted to physically locate each 

of the 141 candidate wells. If the well was located, the well 

then was documented and an effort was made to measure the 

depth to water in the well and the total depth of the well. A 

total of 121 of the 141 candidate wells were located. Twenty 
10 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

Tgl

Twg

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Tgl

Tgw

Qt

Tgl

Qt

Qt

Qa

Twg

Twg

Qt

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Tb

Twg

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Twlc

Qt

Tgl

Twg

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Qt

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Twg

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15aab01

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10dad01

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06cda01 02dab01

01cc 01

08aac01

25cdc01

19cb 01

08bcb01

13baa01

15dca01

29da 02

Base from Green and Drouillard, 1994, 1:500,000 Geology from Green and Drouillard (1994)

Albers Equal-Area Conic projection

Standard parallels 29°30'N and 45°30'N

Central meridian 111°00'W

0 6 12 MILES

0 6 12 KILOMETERS

110°00’ 109°50’ 109°40’ 109°30’

42°30’

42°20’

42°10’

Eden

Farson

Marbleton

Big Piney

T

24

N 

R 106 W

T

28

N 

T

29

N 

T

30

N 

T

25

N 

T

26

N 

T

27

N 

R 112 W R 111 W R 110 W R 109 W R 108 W R 107 W

351

189

191

28

Geohydrologic unit

EXPLANATION

Lacustrine or playa deposits

Eolian deposits

Terrace deposits

Bridger Formation

Laney Member of the Green 

River Formation

Alluvium and colluvium

Glacial deposits

Qa

Qs

Qt

Qg

Tb

Tgl

Wilkins Peak Member of the Green 

River Formation

Farson Sandstone Member of the Green 

River Formation/Alkali Creek Tongue 

of the Wasatch Formation

Cathedral Bluffs Tongue of the Wasatch 

Formation 

La Barge and Chappo Members of the 

Wasatch Formation

Pre-Tertiary rocks

Tgw

Twc

Twlc

pT

Twg

Ql

Ql

Fontenelle

 Reservoir

Big Sandy 

Reservoir

Big

Sandy

River

Big

Sandy

River

New

Fork

River

Green

River

River

Green

350

Tgw

Normally Pressured Lance (NPL) natural 

gas development project boundary

Jonah Infill Development Project 

boundary

NPL well site type and identifier

Water level measured

Flowing

Water-level measurement might be 

possible 

No access for water-level measurement 

05dbb01

34ada01

02dab01

25cdc01

Qs

Twc Twc

Qg pT

Figure 5. Location of credible/suitable wells (79 wells) and candidate credible/suitable wells (13 wells) located within 

the U.S. Geological Survey study area.
References Cited 11

wells were not able to be located, either because of incorrect 

location information, or because the well had been abandoned 

and the site reclaimed. For each of these 20 wells, at least 

2 attempts were made to locate them, and in each case there 

was no surface evidence of the well. Of the wells located, 20 

were plugged or sealed and abandoned, and 9 of these wells 

were dry. 

Of the remaining wells located, a total of 92 wells were 

determined to either meet some credible/suitable criteria 

(79 wells) or to be candidate wells that might meet credible/

suitable criteria (13 wells). At the latter wells, site conditions 

prevented measuring water levels at the time of the initial 

visit. These wells were documented and are planned to be 

revisited in 2013. Eight of the wells located were free flowing 

and are planned to be revisited in 2013 to measure the pressure 

of the well to determine a water level. 

References Cited

amec, 2012, Final technical report, hydrogeologic data gaps 

investigation, interim plan—Pinedale Anticline Project Area 

ROD, Sublette County, Wyoming: [variously paged].

AMEC Geomatrix, 2009, Final plan of study for credible/suitable well determination, interim plan, Pinedale Anticline 

Oil and Gas Exploration and Development Project, Sublette 

County, Wyoming: AMEC Geomatrix Report, [variously 

paged], accessed May 20, 2012, at http://www.blm.gov/

pgdata/etc/medialib/blm/wy/field-offices/pinedale/papadocs.

Par.9556.File.dat/CredibleWellsPOS5-15-09.pdf.

Bureau of Land Management, 2007, Land administration data: 

accessed March 5, 2013, at http://www.geocommunicator.

gov/blmMap/MapLSIS.jsp.

Bureau of Land Management, 2011, Notice of intent to prepare an environmental impact statement for the proposed 

Normally Pressured Lance natural gas development project, 

Sublette County, WY: Federal Register, v. 76, no. 70, 

p. 20,370–20,371, accessed May 20, 2012, at http://www.

blm.gov/pgdata/etc/medialib/blm/wy/information/NEPA/

pfodocs/npl.Par.97254.File.dat/noi.pdf.

Clarey, K.E., Bartos, T.T., Copeland, David, Hallberg, L.L., 

Clark, M.L., and Thompson, M.L., 2010, Green River Basin 

Water Plan II Groundwater Study, Level I (2007–2009), in

Copeland, Davis, and Ewald, Meg, eds., Available Groundwater Determination Technical Memorandum: Laramie, 

Wyo., Wyoming State Geological Survey, [variously 

paged], accessed May 20, 2012, at http://waterplan.state.

wy.us/plan/green/green-plan.html.

Cunningham, W.L., and Schalk, C.W., comps., 2011, Groundwater technical procedures of the U.S. Geological Survey: 

U.S. Geological Survey Techniques and Methods, book 1, 

chap. A1, 151 p., accessed May 20, 2012, at http://pubs.

usgs.gov/tm/1a1/.

Duke, E.A., Pocewicz, Amy, and Jester, Steve, 2011, Upper 

Green River Basin Ecosystem Services Feasibility Analysis 

Project Report: Lander, Wyo., The Nature Conservancy, 

30 p. (Also available at http://www.nature.org/ourinitiatives/

regions/northamerica/unitedstates/wyoming/science/dukeetal2011-uppergreenpes-report.pdf.)

EnCana Oil & Gas (USA), Inc., 2011, Plan of Development 

6-29-11—Normally Pressured Lance Natural Gas Development Project Sublette County, Wyoming: accessed May 20, 

2012, at http://www.blm.gov/pgdata/etc/medialib/blm/wy/

information/NEPA/pfodocs/npl.Par.40081.File.dat/POD.pdf.

Green, G.N., and Drouillard, P.H., 1994, The digital geologic 

map of Wyoming in ARC/INFO format: U.S. Geological 

Survey Open-File Report 94–425, accessed May 20, 2012, 

at http://pubs.usgs.gov/of/1994/ofr-94-0425/.

Trihydro Corporation, 2011, Groundwater Characterization—Normally Pressured Lance Gas Development Project 

Sublette County, Wyoming: Laramie, Wyo., EnCana Oil & 

Gas (USA), Inc., Trihydro Corporation, 1,312 p.

Trihydro Corporation, 2012, 2012 Annual water sampling—

Normally Pressured Lance Gas Development Project, Sublette County, Wyoming: Laramie, Wyo., EnCana Oil & Gas 

(USA), Inc., Trihydro Corporation, [variously paged], 1 CD.

U.S. Geological Survey, 2004, User’s manual for the National 

Water Information System of the U.S. Geological Survey—Ground-Water Site-Inventory System: U.S. Geological Survey Open-File Report 2004–1238, Version 4.3, 

262 p., accessed May 20, 2012, at http://pubs.usgs.gov/

of/2004/1238/. 

U.S. Geological Survey, 2012, National Water Information 

System, available online at http://nwis.waterdata.usgs.gov/

wy/nwis/inventory.
12 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

H

Coded by

FORM NO. 9-1904-A

Revised Sept 2009, NWIS 4.9

Checked by

Entered by

AGENCY

CODE (C4)

SITE ID

(C1)

STATION NAME (C12/900)

LATITUDE

(C9)

LONGITUDE

(C10)

LAT/LONG

ACCURACY

(C11) Hndrth

sec. 

 LAT/LONG 

 DATUM (C36) LAT/LONG

METHOD (C35)

alluvial

fan

active

no/na inactivesite inventory site

playa

month day year

stream

channel

digital

recorder

North American

Datum of 1927

North American

Datum of 1983

graphic

recorder

telemetry

land

line

telemetry

radio

telemetry

satellite

creststage

gage

tide

gage

stilling

well

deflection

meter

bubble

gage

CR type

recorder

weighing

rain

gage

tipping

bucket

rain

gage

acoustic

velocity

meter

electromagnetic

flowmeter

AHDAS

depression dunes flat floodplainhilltopsinkholelake or

swamp

mangrove

swamp 

offshorepedimenthillsideterraceundulating

tenth

sec. 

half

sec. sec. 3sec. 

10

sec.

5

sec. 

valley

flat

upland

draw

DGPS GPS LORAN map

min.

survey unknown

section township range

County code

1/4 1/4 1/4 merid

DISTRICT (C6) STATE (C7)

COUNTY or TOWN (C8)

LAND NET (C13)

MAP NAME

(C14)

AGENCY

USE (C803)

MAP

SCALE (C15)

REMARKS (C806)

FOOTNOTES

INSTRUMENTS (C805)

(Place a "Y' in the

appropriate box):

DRAINAGE

BASIN CODE

(C801)

TOPOGRAPHIC

SETTING

(C19)

DATE

INVENTORIED

(C711)

SITE

TYPE

(C802)

ALTITUDE

METHOD

(C17)

ALTITUDE

(C16)

ALTITUDE

ACCURACY

(C18)

HYDROLOGIC

UNIT CODE

(C20)

ALTITUDE

DATUM

(C22)

PROJECT

(C5)

File Code

Date U.S DEPT. OF THE INTERIOR

GEOLOGICAL SURVEY

U S G S

GROUNDWATER SITE SCHEDULE

General Site Data

D G L N U M

R

TS

A B C D

NAD27 NAD83

E F G H K

A I O

conditional proprietary local use

only

RECORD READY

FOR WEB (C32)

DAYLIGHT 

SAVINGS TIME 

FLAG (C814)

Y OR N

C P L

L M O P S T U V W

1

National Geodetic

Vertical Datum of 1929

North American 

 Vertical Datum of 1988

NGVD29 NAVD88

1

COUNTRY (C41)

STANDARD TIME

ZONE (C813)

SITE TYPE

 (C802)

S R51 M

water

supply

domestic commercialindustrial irrigation mining livestock power

hydroelectric

waste

water

treatment

WS DO CO IN IR MI LV PH ST remediation

thermoelectric

power

aquaculture

RM TE AQ

R S interpolated

digital map

reported

pressure

transducer

F T UUnknown 

DATA TYPE (C804)

Place an 'A' (active), an

'I' (inactive), or an 'O'

(inventory) in the

appropriate box WL

cont

WL

int

QW

cont

QW

int

PR

cont PR

int EV

cont

EV

int

wind

vel.

tide

cont

tide

int

sed.

con sed.

ps peak

flow

low

flow

state

water

use

C

land

net

C39 is mandatory for all sites having data in SWUDS.

Y

ready to

display

 

GL Glacier 

WE Wetland

AT Atmosphere 

ES Estuary 

LA Land 

LA -EX Excavation

LA -OU Outcrop 

LA -SNK Sinkhole 

LA -SH Soil hole 

LA -SR Shore 

 

OC Ocean 

OC -CO Coastal 

LK Lake, Reservoir,

 Impoundment

SP Spring 

ST Stream 

ST -CA Canal 

ST -DCH Ditch 

ST -TS Tidal strea m 

GW Well 

GW -CR Collector or Ranney type well

GW -IW Interconnected wells 

GW -TH Test hole not completed as a well

GW -MW Multiple wells

 

 

GW -EX Extensometer well 

GW -HZ Hyporheic -zone well 

- Primary Secondary

2

FA-WIW Waste-Injection well

C36 Other (see manual for codes)

C22 Other (see manual for codes)

IfSAR

A D I J M altimeter GPS DGPS Level map reported unknown

G L R UN LiDAR DEM

NATIONAL

WATER-USE

(C39)

2 D

discontinued

L M

active

written

active

oral

remediated

 

SB ecafrusbuS

SB-CV Cave

 

 

niard retawdnuorG - DWG-BS

 SB-TSM Tunnel, shaft, or mine

SB-UZ enoz detarutasnU

Figure 3. Example field form (Form 9-1904-A) used to document the assessment of and information about each well.
References Cited 13

anode standby

emer. supply

drain geothermalseismic heat

reservoir

mine observationoil or

gas

recharge repressurizetest unused withdrawal/

return

withdrawalwaste destroyed

USE OF

SITE

(C23)

SECONDARY USE

OF SITE

(C301) (See

use of site)

TERTIARY

USE OF

SITE

(C302) (See

use of site)

SECONDARY USE

OF WATER

(C25) (see use

 of water)

TERTIARY

USE OF 

WATER 

(C26)

(see use of water)

A C D E G H M O P R S T U V W X Z

airline analog calibrated

airline estimated

pressure

gage

calibrated

press. gage

geophysical logs manometernon-rec.

gage

reported steel

tape

electric

tape

calibrated

elec. tape

other

METHOD OF WATER-LEVEL

MEASUREMENT(C239) A B C G H L M N R S T V Z

dry recently

flowing

flowing nearby

flowing

nearby

recently

flowing

injector

site

injector

site

monitor

measurement

discontinued

plugged obstructionpumping recently

pumped

nearby

pumping

nearby

recently

pumped

foreign

substance

well

destroyed

affected by

surface

water

other

SITE STATUS

FOR WATER

LEVEL (C238)

D E F G H I J M N O P R S T V W X Z

air-rotary bored or

augered

cable

tool

dug hydraulic

rotary

jetted air percussionreverse

rotary

trenching driven drive wash other

METHOD OF

CONSTRUCTION (C65)

A B C D H J P R T V W Z

air

cond.

bottling commercialdewaterpower fire domesticirrigationindustrial (cooling)mining medicinalindustrialpublic

supply

aquaculturerecreationsstock institutionalunused desalinationother

USE OF 

WATER

(C24)

A B C D E F H I J K M N P Q R S T U Y Z

2 - Groundwater Site Schedule

field

checked

poor

location

minimal

data

unchecked

DATA RELIABILITY (C3) C L M U

bentonite clay cement

grout

none other

TYPE OF

SEAL

(C67)

B C G N Z

unconfined

single

unconfined

multiple

confined

single

confined

multiple

mixed

AQUIFER

TYPE

(C713)

U N C M X

porous

concrete gravelw/perf. gravelscreen horiz.gallery openend perf orslotted screen sandpoint walled openhole other

TYPE OF

FINISH (C66) C F G H O P S T W X Z

other

gov't

driller geologistlogs memory owner other

reported

reporting

agency

other

SOURCE

OF DEPTH

DATA (C29)

A D G L M O R S Z

air-lift

pump

bailed compressed airjetted none pumped surged other

A B C J N P S Z

chemicalsdry ice explosivesdeflocculent

hydrofracturingmechanicalother

C D E F H M Z

SOURCE OF DATA

(C64)

NAME OF CONTRACTOR

(C63)

SOURCE OF WATER-LEVEL

DATA (C244) A

C O N S

D G L M O R S Z

month day year DATE OF FIRST CONSTRUCTION (C21)

month day year

DATE WATER-LEVEL MEASURED (C235)

month day year

PRIMARY

AQUIFER (C714)

HOURS OF DEVELOPMENT (C70)

BOTTOM OF SEAL (C68) METHOD OF DEVELOPMENT (C69) 

SPECIAL TREATMENT (C71) 

RECORD TYPE (C754) RECORD SEQUENCE NO. (C723)

WATER LEVEL

(C237/241/242)

TIME (C709)

HOLE

DEPTH

(C27)

WELL

DEPTH

(C28)

GENERAL SITE DATA

WATER-LEVEL DATA

CONSTRUCTION DATA

other

gov't

driller's

log

geologistmemory owner other

reported

reporting

agency

other

DATE OF COMPLETED

CONSTRUCTION (C60)

other

gov't

driller geologistlogs memory owner other

reported

reporting

agency

other

A D G L M O R S Z

PERSON MAKING

MEASUREMENT (C246)

(WATER LEVEL PARTY)

MEASURING AGENCY (C247)

(SOURCE)

Y C P L RECORD READY FOR 

WEB (C858)

WATER-LEVEL

ACCURACY (C276) 0 1 2 9

WATER-LEVEL TYPE 

CODE (C243) L M S

MP SEQUENCE NO. (C248)

(Mandatory if WL type=M)

A B atmos.

pressure

tide

stage

F

transducer

 land

 surface meas.

 pt. vertical

 datum

foot tenth hundredthnot to

nearest

foot

WATER-LEVEL

DATUM (C245)

(Mandatory if WL type=S)

NGVD29 NAVD88 National Geodetic Vertical Datum 0f 1929

North American

Vertical Datum 0f 1988 Other (See manual for codes)

NATIONAL

AQUIFER (C715)

C

ice

O

observed

geophysical logs

S

sonic

conditional proprietary local use only ready to

display

EQUIP ID (C249)

(20 char) ________________________________________________

REMARKS (C267)

(256 char) ______________________________________________________________________________________

 ______________________________________________________________________________________

D

differential

GPS

E P

acoustic

pulse
14 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

CONSTRUCTION HOLE DATA (3 sets shown)

CONSTRUCTION CASING DATA (4 sets shown)

FOOTNOTE:

4

4

4

4

C S N G

Groundwater Site Schedule - 3

B C D G H I M P R S T U W Z

RECORD TYPE (C756)

RECORD TYPE (C758)

RECORD SEQUENCE NO. (C724)

RECORD SEQUENCE NO. (C724)

RECORD SEQUENCE NO. (C725)

RECORD SEQUENCE NO. (C724)

CASING MATERIAL (C80)

CASING MATERIAL (C80)

CASING MATERIAL (C80)

CASING MATERIAL

CODES

CASING THICKNESS (C81)

CASING THICKNESS (C81)

CASING THICKNESS (C81)

DEPTH TO BOTTOM OF

INTERVAL (C74)

DEPTH TO TOP OF

INTERVAL (C73)

DEPTH TO TOP OF

CASING (C77)

DEPTH TO TOP OF

CASING (C77)

DEPTH TO TOP OF

CASING (C77)

DEPTH TO BOTTOM OF

CASING (C78)

DEPTH TO BOTTOM OF

CASING (C78)

DEPTH TO BOTTOM OF

CASING (C78)

DIAMETER OF 

INTERVAL (C75)

DEPTH TO BOTTOM OF

INTERVAL (C74)

DEPTH TO TOP OF

INTERVAL (C73)

DIAMETER OF 

INTERVAL (C75)

DIAMETER OF 

CASING (C79)

DIAMETER OF 

CASING (C79)

DIAMETER OF 

CASING (C79)

DEPTH TO BOTTOM OF

INTERVAL (C74)

DEPTH TO TOP OF

INTERVAL (C73)

DIAMETER OF 

INTERVAL (C75)

SEQUENCE NO. OF PARENT RECORD (C59)

SEQUENCE NO. OF PARENT RECORD (C59)

brick concrete copper galv.

 iron

wrought

iron

other

metal

PVC or

plastic

rock or

stone

 steel tile coated

steel

wood other

mat.

A

abs

E

PTFE

F

 Fiber- 

 glass

Fiberglass

plastic

J

 Fiberglass

epoxy

K

PVC

 threaded

L

 glass

N

PVC

glued

 Q

 FEP

V

stainless

steel

X Y steel

carbon steel galva-

 nized

4 6 stainless

304

stainless

316

H O L E

RECORD SEQUENCE NO. (C725) SEQUENCE NO. OF PARENT RECORD (C59)

RECORD SEQUENCE NO. (C725) SEQUENCE NO. OF PARENT RECORD (C59)

4 CASING MATERIAL (C80) CASING THICKNESS (C81)

DEPTH TO TOP OF

CASING (C77)

DEPTH TO BOTTOM OF

CASING (C78)

DIAMETER OF 

CASING (C79)

RECORD SEQUENCE NO. (C725) SEQUENCE NO. OF PARENT RECORD (C59)
References Cited 15

CONSTRUCTION OPENINGS DATA (3 sets shown)

FOOTNOTES:

CONSTRUCTION MEASURING POINT DATA

5

5

5

5

6

6

O P E N

M P N T

B C G I M P R S T Z

F L M P R S T W X Z

4 - Groundwater Site Schedule

RECORD TYPE (C760) RECORD SEQUENCE NO. (C726)

LENGTH OF OPENING

(C89)

TYPE OF OPENING

(C85)

6 TYPE OF OPENING

(C85)

6 TYPE OF OPENING

(C85)

LENGTH OF OPENING

(C89)

LENGTH OF OPENING

(C89)

RECORD

TYPE

(C766)

RECORD

SEQUENCE

NO. (C728)

BEGINNING

DATE

(C321) month day year

M.P. REMARKS (C324)

M.P. HEIGHT (C323)

ENDING

DATE

(C322)

RECORD SEQUENCE NO. (C726)

RECORD SEQUENCE NO. (C726)

DEPTH TO BOTTOM OF

INTERVAL (C84) DEPTH TO TOP OF

INTERVAL (C83)

DIAMETER OF 

INTERVAL (C87)

MATERIAL TYPE (C86)

MATERIAL TYPE (C86)

MATERIAL TYPE (C86)

TYPE OF MATERIAL CODES FOR

OPEN SECTIONS

TYPE OF OPENINGS CODES

WIDTH OF OPENING

(C88)

WIDTH OF OPENING

(C88)

DEPTH TO BOTTOM OF

INTERVAL (C84)

DEPTH TO BOTTOM OF

INTERVAL (C84)

DEPTH TO TOP OF

INTERVAL (C83)

DEPTH TO TOP OF

INTERVAL (C83)

DIAMETER OF 

INTERVAL (C87)

WIDTH OF OPENING

(C88)

DIAMETER OF 

INTERVAL (C87)

SEQUENCE NO. OF PARENT RECORD (C59)

brass

 or

bronze

concrete PTFE other

metal PVC stainless

steel

steel tile other

fractured

rock louvered orshutter-type mesh screen perforated,porous or

slotted

wirewound

screen

screen

(unk.) sandpoint

screen

walled or

shored

open

hole other

A

ABS

D E F H J K L N Q V W X Y 4 6 ceramic fiberglass galv. 

iron fiberglass

plastic

wrought

iron fiberglass

epoxy

PVC 

threaded

glass PVC 

glued FEP brick membrane steel

carbon steelgalvanized

stainless

304

stainless

316

ALTITUDE OF

MEASURING

POINT (C325)

ALTITUDE 

ACCURACY

(C327)

ALTITUDE 

METHOD

(C326)

ALTITUDE 

DATUM

(C328)

Y C P L RECORD READY FOR 

WEB (C857)

conditional proprietary local use

only ready todisplay
16 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

CONSTRUCTION LIFT DATA

MISCELLANEOUS OWNER DATA

A B

D E G H L N W Z

C J P R S T U Z

O W N R

L I F T

Groundwater Site Schedule - 5

RECORD TYPE

(C752)

OWNER'S

NAME

(C161)

RECORD TYPE (C768)

RECORD SEQUENCE

NO. (C254)

RECORD SEQUENCE NO. (C718)

TYPE OF 

POWER (C45)

POWER COMPANY ACCOUNT

NUMBER (C51)

PUMP

INTAKE

DEPTH (C44)

DATE

RECORDED

(C38)

MANUFACTURER

(C48)

HORSEPOWER

RATING

 (C46)

ADDITIONAL LIFT

 (C255)

PUMP RATING (C53)

(million gallons/units of fuel)

RATED PUMP CAPACITY

(gpm) (C268)

DATE OF OWNERSHIP (C159)

JONES, RALPH A.

JONES CONSTRUCTION COMPANY

EXAMPLES:

POWER COMPANY (C50)

POWER METER

NUMBER (C52)

PERSON OR COMPANY

MAINTAINING PUMP (C54)

HORSEPOWER OF STANDBY POWER SOURCE (C57)

STANDBY POWER (C56)

(see TYPE OF POWER)

SERIAL NO.

(C49)

TYPE OF LIFT

(C43)

diesel electric gasolinehand LP gas natural

gas

windmill other

centrifugalair bucket jet piston rotary submersibleturbine unknownother

month day year

WU OWNER

TYPE

(C350)

IN OT WS Individual Water 

Supplier

Other

OWNER'S

PHONE

NUMBER

(C351)

ACCESS TO

OWNER'S

NAME

(C352)

0 1 2 3 4 Public

Access

CooperatorUS GS

Only

District

Only

P roprietary

OWNER'S ADDRESS

(LINE 1)

(C353)

OWNER'S ADDRESS

(LINE 2)

(C354)

OWNER'S CITY

NAME

(C355)

STATE (C356) OWNER'S ZIP

CODE (C357) 

OWNER'S COUNTRY

NAME

(C358)

ACCESS TO OWNER'S

PHONE/ADDRESS

(C359)

0 1 2 3 4 Public

Access Cooperator US GSOnly DistrictOnly P roprietary

MISCELLANEOUS VISIT DATA

RECORD TYPE (C774) V I S T RECORD SEQUENCE NO. (C737) DATE OF VISIT (C187)

NAME OF PERSON (C188)

month day year

CP GV Corporation

 Government

END DATE OF OWNERSHIP (C374)

X

no lift

S

 solar

MI

Military

TG

Tribal
References Cited 17

MISCELLANEOUS LOGS DATA (3 sets shown)

L O G S

A D G L M O R S Z

6 - Groundwater Site Schedule

other

gov't driller geologist logs memory owner otherreported reportingagency other

RECORD TYPE (C778) RECORD SEQUENCE NO. (C739)

ENDING

DEPTH

(C201)

SOURCE OF

DATA

(C202)

BEGINNING

DEPTH

(C200)

MISCELLANEOUS OTHER DATA

RECORD TYPE (C772) O T D T

OTHER DATA

TYPE (C181)

OTHER DATA LOCATION (C182) DATA FORMAT (C261)

RECORD SEQUENCE NO. (C312)

Cooperator's

Office, DistrictOffice ReportingAgency other files, machine published,

readable, other

TYPE OF LOG (C199)

F M P Z DATA FORMAT (C225) files machine published

readable other

OTHER DATA

LOCATION (C226)

L O G S

A D G L M O R S Z

other

gov't

driller geologistlogs memory owner other

reported

reporting

agency

other

RECORD TYPE (C778) RECORD SEQUENCE NO. (C739)

ENDING

DEPTH

(C201)

SOURCE OF

DATA

(C202)

BEGINNING

DEPTH

(C200)

TYPE OF LOG (C199)

DATA FORMAT (C225) files machine published

readable other

OTHER DATA

LOCATION (C226)

L O G S

A D G L M O R S Z

other

gov't

driller geologistlogs memory owner other

reported

reporting

agency

other

RECORD TYPE (C778) RECORD SEQUENCE NO. (C739)

ENDING

DEPTH

(C201)

SOURCE OF

DATA

(C202)

BEGINNING

DEPTH

(C200)

TYPE OF LOG (C199)

DATA FORMAT (C225) files machine published

readable other

OTHER DATA

LOCATION (C226)

ACOUSTIC LOG:

AS Sonic

AV Acoustic velocity

AW Acoustic waveform

AT Acoustic televiewer

CALIPER LOG:

CP Caliper

CS Caliper, single arm

CT Caliper, three arm

CM Caliper, multi arm

CA Caliper, acoustic

DRILLING LOG:

DT Drilling time

DR Drillers

DG Geologists

DC Core

ELECTRIC LOG:

EE Electric

ER Single-point resistance

EP Spontaneous potential

EL Long-normal resistivity

ES Short-normal resistivity

EF Focused resistivity

ET Lateral resistivity

EN Microresistivity

EC Microresistivity, forused

EO Microresistivity, lateral

ED Dipmeter

FLUID LOG:

FC Fluid conductivity

FR Fluid resistivity

FT Fluid temperature

FF Fluid differential temperature

FV Fluid velocity

FS Spinner flowmeter

FH Heat-pulse flowmeter

FE Electromagnetic flowmeter

FD Doppler flowmeter

FA Radioactive tracer

FY Dye tracer

FB Brine tracer

NUCLEAR LOG:

NG Gamma

NS Spectral gamma

NA Gamma-gamma

NN Neutron

NT Neutron activitation

NM Neuclear magnetic

 resonance

OPTICAL LOG:

OV Video

OF Fisheye video

OS Sidewall video

OT Optical televiewer

COMBINATION LOG:

ZF Gamma, fluid

 resistivity, temperature

ZI Gamma, electromagnetic

 induction

ZR Long/short normal

 resistivity

ZT Fluid resistivity,

 temperature

ZM Electromagnetic flowmeter,

 fluid resistivity,

 temperature

ZN Long/short normal

 resistivity, spontaneous

 potential

ZP Single-point resistance,

 spontaneous potential

ZE Gamma, long/short

 normal resistivity,

 spontaneous potential,

 single-point resistance,

 fluid resitivity,

 temperature

OTHER LOG:

OR Other

ELECTROMAGNETIC LOG:

MM Magnetic log

MS Magnetic susceptibiity log

MI Electromagnetic induction log

MD Electromagnetic dual induction log

MR Radar reflection image log

MV Radar direct-wave velocity log

MA Radar direct-wave amplitude log

WELL CONSTRUCTION LOG:

WC Casing collar

WD Borehold deviation

MISCELLANEOUS OTHER ID DATA

O T I D RECORD SEQUENCE

NO. (C736) OTHER ID (C190)

ASSIGNER (C191)

RECORD TYPE (C770)

RECORD SEQUENCE

NO. (C736) OTHER ID (C190)

ASSIGNER (C191)

(2 sets shown)

F M P Z

F M P Z

C D R Z F M P Z
18 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

MISCELLANEOUS NETWORK DATA (3 types shown)

MISCELLANEOUS REMARKS DATA (4 types shown)

Subsequent entries may be used to continue the remark. Miscellaneous remarks field is limited to 256 characters.

FOOTNOTES:

7

7

7

7

8

8

8

8

8

8

8

A B C D E F G H I J K L M N P Z

A B C D F I M O Q S W Z 2 3 4 5 X

1 2 3 4

C E M U Z

Q W

W L

W D

N E T W

N E T W

N E T W

R M K S

Groundwater Site Schedule - 7

RECORD TYPE

(C780)

RECORD TYPE

(C780)

RECORD SEQUENCE

NO. (C730)

RECORD SEQUENCE

NO. (C730)

RECORD SEQUENCE NO. (C311) DATE OF REMARK (C184)

TYPE OF 

NETWORK

(C706)

TYPE OF 

NETWORK

(C706) water

level

water

quality

pumpage

or withdrawals

BEGINNING

YEAR (C115)

ENDING

YEAR (C116)

BEGINNING

YEAR (C115)

ENDING

YEAR (C116)

RECORD TYPE

(C780)

RECORD TYPE

(C788)

REMARKS (C185)

RECORD SEQUENCE

NO. (C730)

TYPE OF 

NETWORK

(C706)

METHOD OF

COLLECTION

(C133)

BEGINNING

YEAR (C115)

ENDING

YEAR (C116)

TYPE OF 

ANALYSIS

(C120)

SOURCE

AGENCY (C117)

SOURCE

AGENCY (C117)

FREQUENCY OF

COLLECTION (C118)

FREQUENCY OF COLLECTION

CODES

NETWORK SITE CODES

FREQUENCY OF

COLLECTION (C118)

FREQUENCY OF

COLLECTION (C118)

ANALYZING

AGENCY (C307)

PRIMARY

NETWORK

SITE (C257)

PRIMARY

NETWORK

SITE (C257)

PRIMARY

NETWORK

SITE (C257)

SECONDARY

NETWORK

SITE (C708)

SECONDARY

NETWORK

SITE (C708)

SECONDARY

NETWORK SITE (C708) SOURCE

AGENCY (C117)

month day year

physical

properties

common

ions traceelements pesticides

calculated estimated metered unknown

national,

annually bi

monthly continuously daily semimonthly intermittent monthly one-timeonly quarterly semiannually weekly other biannually every 3years every 4years every 5years every 10years

district, project, cooperator,

other

nutrients sanitary

analysis codesD&B codesB&E codesB&C codesB&F codesD&E codesC,D&E all or most codesB&C&

radioactive

codes

B,C&A other

R M K S RECORD SEQUENCE NO. (C311) DATE OF REMARK (C184) RECORD TYPE

(C788)

REMARKS (C185)

month day year

Subsequent entries may be used to continue the remark. Miscellaneous remarks field is limited to 256 characters.
References Cited 19

SITE LOCATION SKETCH AND DIRECTIONS

GEOHYDROLOGIC AQUIFER DATA

GEOHYDROLOGIC DATA

DISCHARGE DATA

G E O H

A Q F R

A D G L M O R S Z

A

A B C D E F M O P R T U V W Z

A B C E G H L M N R S T

P S N U

V Z

D G L M O R S Z

8 - Groundwater Site Schedule

airline recorder calibrated

airline

estimatedpressure

gage

calibrated

press. gage

geophysical logsmanometernon-rec.

gage

reported steel

tape

electric

tape

calibrated

elec. tape

other

other

gov't

acoustic

meter bailer currentmeter Dopplermeter estimated flume totalingmeter orifice pitot-tube reported trajectory venturimeter volumetricmeas weir other

driller geologist logs memory owner other

reported

reporting

agency

principal

aquifer

secondary

aquifer

no

contribution

unknown

other

other

gov't

driller geologist logs memory owner other

reported

reporting

agency

other

RECORD

TYPE (C748)

RECORD TYPE (C750)

RECORD

SEQUENCE N0.

(C721)

DEPTH TO

TOP OF UNIT

(C91)

DEPTH TO

BOTTOM OF

UNIT (C92)

LITHOLOGY

(C96) CONTRIBUTING 

 UNIT (C304)

CONTRIBUTION (C132)

UNIT

IDENTIFIER (C93)

LITHOLOGIC MODIFIER (C97)

Township

month day year

month day year

DATE (C95)

Section #

Range

PUMPING PERIOD (C157)

SPECIFIC

CAPACITY (C272)

DATE DISCHARGE

MEASURED (C148)

TYPE OF

DISCHARGE

(C703)

DISCHARGE (gpm)

(C150)

RECORD SEQUENCE NO. (C147)

RECORD SEQUENCE NO. (C742) SEQUENCE NO. OF PARENT RECORD (C256)

ACCURACY OF 

DISCHARGE

MEASUREMENT (C310)

SOURCE OF DATA (C155)

PRODUCTION WATER LEVEL (C153) STATIC WATER LEVEL (C154)

STATIC WATER LEVEL (C126)

METHOD OF

DISCHARGE

MEASUREMENT

(C152)

METHOD OF WATER-LEVEL

MEASUREMENT (C156)

DRAWDOWN

(C309)

SOURCE OF DATA (C151)

excellent

(LT 2%),

good

(2%-5%)

fair

(5%-8%)

poor

(GT 8%)

E G F P

X

unknown

D O observed

F

transducer

differential 

GP

Q

 aggregate 

 of lithologic 

units

P F pumped flow

P

acoustic

pulse
20 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

Table 4. Summary of candidate credible/suitable wells visited in the study area, 2012.

[LSD, Land surface datum; ft, foot; bls, below land surface; Type of surface seal: G, cement grout; --, not reported; B, bentonite; Z, other; Primary aquifer: LNEY, 

Laney Member of Green River Formation; FNNL, Farson Sandstone Member of the Green River Formation/Alkali Creek Tongue of the Wasatch Formation; EOCN, 

Eocene; WSTC, Wasatch Formation; NFRK, New Fork Tongue of Wasatch Formation; --, not assigned; CDBF, Cathedral Bluffs Tongue of Wasatch Formation; 

Water level status: P, pumping; F, flowing; R, recently pumped; Z, other; O, obstructed; Water level method: T, electric tape; --, water level not measured; S, steel tape; 

O, observed; Credible/suitable data objective met: C, critical common; 1, horizontal flow; 2 vertical gradient; 5, water-quality surface release; 6 water-quality 

excursion; Remarks: ft, foot; SE, southeast; shaded cells: tan, candidate well that could not be accessed to measure water level; blue, free flowing well]

Local 

well 

number

Site number Measurement 

date

Well depth, 

feet below 

LSD

Depth to top of 

open interval, 

ft bls

Depth to bottom 

of open interval, 

ft bls

Length of 

open interval, 

ft bls

Type of 

surface 

seal

Depth to bottom 

of surface seal, 

ft bls

01cc 01 420513109504701 20120803 71.79 57 72 15 G -- 

34ada01 420610109402201 20120801 853 758 853 95 G 0 

30cac01 420703110051501 20120802 705 646 705 59 G -- 

23ddc01 420710109315601 20120730 1365 687 720 33 G 63 

1,012 1,044 32

1,173 1,206 33

1,324 1,334 10

21cac01 420757109555601 20120801 189.69 43 59 16 G 0 

100 190 90

19aaa01 420759109363201 20120730 228.37 204 225 21 G -- 

18dcc01 420814109510201 20120803 825 662 822 160 G 666 

22dbb01 420822110013201 20120802 774.84 615 760 145 G 0 

13baa01 420901109460001 20120801 482.84 -- -- G 0 

15aab01 420905109540901 20120801 500.00 211 500 289 G 211 

10dad01 420915109403901 20120731 882 756 882 126 G 756 

14aab01 420919110065301 20120802 685 625 685 60 G -- 

06cda01 420957109370901 20120730 -- -- -- -- -- 

02da 01 421005109315901 20120730 200 150 190 40 -- 0 

04add01 421025109481901 20120801 190.0 102 205 103 G 102 

02dbc01 421045110002001 20120802 480 -- -- G 0 

34dca01 421051109543001 20120620 280.45 -- -- G 0 

32abb01 421127109354601 20120625 190.97 160 200 40 G 20 

28cda01 421208110025801 20120802 710 570 710 140 G 20 

30bab01 421219109433801 20120621 618 170 190 20 G 0 

480 618 138

15dca01 421308109541901 20120801 316 190 220 30 G 0 

280 316 36

17da 01 421321109493502 20120801 193 -- -- G 0 

16ada01 421351109341501 20120730 79.67 60 80 20 B 55 

09cda01 421418109345001 20120629 174.03 130 180 50 G 20 

10ccd01 421421109475001 20120614 312 60 80 20 G 0 

280 310 30

10dba01 421433109402301 20120621 490 469 490 21 G -- 

05cbc01 421515109501801 20120614 207.47 49 210 161 G 49 
Table 4 21

Table 4. Summary of candidate credible/suitable wells visited in the study area, 2012.—Continued

[LSD, Land surface datum; ft, foot; bls, below land surface; Type of surface seal: G, cement grout; --, not reported; B, bentonite; Z, other; Primary aquifer: LNEY, 

Laney Member of Green River Formation; FNNL, Farson Sandstone Member of the Green River Formation/Alkali Creek Tongue of the Wasatch Formation; EOCN, 

Eocene; WSTC, Wasatch Formation; NFRK, New Fork Tongue of Wasatch Formation; --, not assigned; CDBF, Cathedral Bluffs Tongue of Wasatch Formation; Water 

level status: P, pumping; F, flowing; R, recently pumped; Z, other; O, obstructed; Water level method: T, electric tape; --, water level not measured; S, steel tape; 

O, observed; Credible/suitable data objective met: C, critical common; 1, horizontal flow; 2 vertical gradient; 5, water-quality surface release; 6 water-quality 

excursion; Remarks: ft, foot; SE, southeast; shaded cells: tan, candidate well that could not be accessed to measure water level; blue, free flowing well]

Local 

well 

number

Primary 

aquifer

Water level, 

feet below 

LSD 

Water 

level 

status

Water 

level 

method

Credible/

suitable data 

objective met1

Site included 

in Trihydro 

network2

Remarks

01cc 01 LNEY 26.69 T C, 1, 2, 5, 6 No Not pumping; trough dry.

34ada01 FNNL -- C, 1, 2, 6 No Cap needs to be drilled for water level access. 

Well inside large metal culvert with steel lid.

30cac01 FNNL 282.49 T C, 1, 2, 6 No Not pumping; trough dry.

23ddc01 FNNL 67.50 P T C, 1, 2, 6 No --

21cac01 LNEY 38.64 S C, 1, 2, 5, 6 No Not pumping; trough dry.

19aaa01 LNEY 5.89 P T C, 1, 2, 6 No

18dcc01 FNNL 281.42 T C, 1, 2, 6 No Not pumping; trough dry.

22dbb01 FNNL 203.45 T C, 1, 2, 6 No Not pumping; trough dry.

13baa01 FNNL 128.71 T C, 6 No Not pumping; trough dry.

15aab01 FNNL 80.10 T C, 1, 2, 6 No Not pumping; trough dry.

10dad01 FNNL 92.24 T C, 1, 2, 6 No Not pumping; trough dry.

14aab01 FNNL 399.47 T C, 1, 2, 6 No Not pumping; trough dry.

06cda01 EOCN F O C, 1,2, 6 No Flowing.

02da 01 LNEY F O C, 1, 2, 5, 6 No Flowing.

04add01 LNEY 12.92 T C, 1, 2, 5, 6 No Not pumping; trough dry.

02dbc01 FNNL 120.96 T C, 6 No Not pumping; trough dry.

34dca01 FNNL 60.45 S C, 6 No Not pumping; trough dry.

32abb01 LNEY 131.69 P T C, 1, 2, 5, 6 No --

28cda01 FNNL 466.20 T C, 1, 2, 6 No Not pumping; trough dry.

30bab01 FNNL 151.40 S C, 1, 2, 6 No Not pumping; trough dry.

15dca01 EOCN 86.57 S C, 1, 2, 5, 6 No Not pumping; trough dry.

17da 01 LNEY 56.69 T C, 6 No Not pumping; trough dry.

16ada01 LNEY 17.52 T C, 1, 2, 5, 6 No Not pumping; trough dry.

09cda01 LNEY 17.76 T C, 1, 2, 5, 6 No Not pumping; trough dry.

10ccd01 FNNL 57.53 T C, 1, 2, 5, 6 No Not pumping; trough dry.

10dba01 FNNL 59.13 S C, 1, 2, 6 No Not pumping; trough dry.

05cbc01 LNEY 34.72 S C, 1, 2, 5, 6 No Not pumping; trough dry.
22 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

Table 4. Summary of candidate credible/suitable wells visited in the study area, 2012.—Continued

[LSD, Land surface datum; ft, foot; bls, below land surface; Type of surface seal: G, cement grout; --, not reported; B, bentonite; Z, other; Primary aquifer: LNEY, 

Laney Member of Green River Formation; FNNL, Farson Sandstone Member of the Green River Formation/Alkali Creek Tongue of the Wasatch Formation; EOCN, 

Eocene; WSTC, Wasatch Formation; NFRK, New Fork Tongue of Wasatch Formation; --, not assigned; CDBF, Cathedral Bluffs Tongue of Wasatch Formation; Water 

level status: P, pumping; F, flowing; R, recently pumped; Z, other; O, obstructed; Water level method: T, electric tape; --, water level not measured; S, steel tape; 

O, observed; Credible/suitable data objective met: C, critical common; 1, horizontal flow; 2 vertical gradient; 5, water-quality surface release; 6 water-quality 

excursion; Remarks: ft, foot; SE, southeast; shaded cells: tan, candidate well that could not be accessed to measure water level; blue, free flowing well]

Local 

well 

number

Site number Measurement 

date

Well depth, 

feet below 

LSD

Depth to top of 

open interval, 

ft bls

Depth to bottom 

of open interval, 

ft bls

Length of 

open interval, 

ft bls

Type of 

surface 

seal

Depth to bottom 

of surface seal, 

ft bls

03ccb02 421524109545601 20120620 140 -- -- G -- 

03cdb01 421532110014301 20120718 825 785 825 40 -- -- 

25cdc01 421633109310701 20120612 92.12 -- -- G 0 

27db 01 421706109402501 20120622 730 520 720 200 -- 20 

20cdb01 421749109360601 20120622 390 270 390 120 G -- 

25abc01 421749109585701 20120717 732 490 732 242 G 20 

21cba01 421800109420701 20120626 700 320 400 80 -- -- 

24cbd01 421804109522801 20120720 702.64 480 500 20 G 20 

520 540 20

560 580 20

600 620 20

640 660 20

22adb01 421811109331401 20120615 1100 -- -- G 60 

21dbb02 421817109553601 20120718 395.69 -- -- G -- 

18cca01 421847109512101 20120614 349 260 349 89 B 250 

07bad01 422016109511001 20120614 483 -- -- G 20 

08abd01 422017109563301 20120717 900 520 580 60 G 16 

740 860 120

06cdd01 422034109580301 20120620 725 480 720 240 G 20 

01bca01 422054109453601 20120614 630 435 455 20 G 20 

500 520 20

545 585 40

36cdb01 422115109312801 20120612 77 160 170 10 B 30 

31dda02 422125109503401 20120614 447.6 -- -- -- -- 

33acd01 422202109553801 20120717 420 -- -- G -- 

31bbd01 422203110051801 20120718 457.39 -- -- -- -- 

28dbd01 422210109342501 20120626 743 630 750 120 G -- 

27cdb01 422212109474701 20120620 510 290 490 200 -- -- 

25cac01 422221109452701 20120613 339.61 290 340 50 G -- 

30dc 01 422221109575101 20120718 500 371 390 19 G -- 

475 500 25 G
Table 4 23

Table 4. Summary of candidate credible/suitable wells visited in the study area, 2012.—Continued

[LSD, Land surface datum; ft, foot; bls, below land surface; Type of surface seal: G, cement grout; --, not reported; B, bentonite; Z, other; Primary aquifer: LNEY, 

Laney Member of Green River Formation; FNNL, Farson Sandstone Member of the Green River Formation/Alkali Creek Tongue of the Wasatch Formation; EOCN, 

Eocene; WSTC, Wasatch Formation; NFRK, New Fork Tongue of Wasatch Formation; --, not assigned; CDBF, Cathedral Bluffs Tongue of Wasatch Formation; Water 

level status: P, pumping; F, flowing; R, recently pumped; Z, other; O, obstructed; Water level method: T, electric tape; --, water level not measured; S, steel tape; 

O, observed; Credible/suitable data objective met: C, critical common; 1, horizontal flow; 2 vertical gradient; 5, water-quality surface release; 6 water-quality 

excursion; Remarks: ft, foot; SE, southeast; shaded cells: tan, candidate well that could not be accessed to measure water level; blue, free flowing well]

Local 

well 

number

Primary 

aquifer

Water level, 

feet below 

LSD 

Water 

level 

status

Water 

level 

method

Credible/

suitable data 

objective met1

Site included 

in Trihydro 

network2

Remarks

03ccb02 LNEY -- C, 6 No No access for water level. Well located behind 

generator shed, next to large storage tank, near 

water troughs. Generator connected to a timer. 

Lots of wiring around well. Original well 50 ft 

southeast of this well.

03cdb01

25cdc01

WSTC

LNEY

484.66

19.45

R S

T

C, 1, 2, 6

C, 6

No

No

Not pumping but troughs are full.

Not pumping; trough dry.

27db 01 FNNL F O C, 1, 2, 6 No Flowing.

20cdb01 FNNL C, 1, 2, 6 No Currently no pump, no access to measure water 

level.

25abc01

21cba01

24cbd01

FNNL

FNNL

FNNL

482.82

123.19

244.72

R S

T

T

C, 1, 2, 6

C, 1, 2, 6

C, 1, 2, 6

No

No

No

Not pumping but troughs are full.

Not pumping; trough dry.

Unused.

22adb01 WSTC F O C, 1, 2, 6 No Flowing.

21dbb02 FNNL 120.66 R S C, 6 No Not pumping but troughs are full.

18cca01

07bad01

FNNL

FNNL

159.33

174.60

S

T

C, 1, 2, 6

C, 6

No

No

Not pumping; trough dry.

No pump in well.

08abd01 WSTC, 

FNNL

382.56 R S C, 1, 2, 6 No Not pumping but troughs are full; revisit, check 

measurement.

06cdd01

01bca01

FNNL

FNNL 245.48 R

--

S

C, 1, 2, 6

C, 1, 2, 6

Yes

No

Unable to access well, no ports and shelter allows 

no room to jack up. Very thick steel plate, 

would be difficult to drill through.

Not pumping.

36cdb01 LNEY 77.31 P S C, 1, 2, 5, 6 No

31dda02 FNNL 219.44 R S C, 6 Yes Not pumping but troughs are full.

33acd01 FNNL 316.24 R T C, 6 Yes Windmill disconnected.

31bbd01 WSTC 223.38 T C, 6 No Open hole.

28dbd01 WSTC 130.62 P T C, 1, 2, 6 No --

27cdb01

25cac01

30dc 01

FNNL

FNNL

NFRK

131.53

115.12

Z

T

T

--

C, 1, 2, 6

C, 1, 2, 6

C, 1, 2, 6

No

No

No

Not pumping.

Not pumping; trough dry.

Well is sealed; may be able to drill.
24 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

Table 4. Summary of candidate credible/suitable wells visited in the study area, 2012.—Continued

[LSD, Land surface datum; ft, foot; bls, below land surface; Type of surface seal: G, cement grout; --, not reported; B, bentonite; Z, other; Primary aquifer: LNEY, 

Laney Member of Green River Formation; FNNL, Farson Sandstone Member of the Green River Formation/Alkali Creek Tongue of the Wasatch Formation; EOCN, 

Eocene; WSTC, Wasatch Formation; NFRK, New Fork Tongue of Wasatch Formation; --, not assigned; CDBF, Cathedral Bluffs Tongue of Wasatch Formation; Water 

level status: P, pumping; F, flowing; R, recently pumped; Z, other; O, obstructed; Water level method: T, electric tape; --, water level not measured; S, steel tape; 

O, observed; Credible/suitable data objective met: C, critical common; 1, horizontal flow; 2 vertical gradient; 5, water-quality surface release; 6 water-quality 

excursion; Remarks: ft, foot; SE, southeast; shaded cells: tan, candidate well that could not be accessed to measure water level; blue, free flowing well]

Local 

well 

number

Site number Measurement 

date

Well depth, 

feet below 

LSD

Depth to top of 

open interval, 

ft bls

Depth to bottom 

of open interval, 

ft bls

Length of 

open interval, 

ft bls

Type of 

surface 

seal

Depth to bottom 

of surface seal, 

ft bls

25bab01 422245109383001 20120626 1042 -- -- G -- 

23bcc01 422330109465201 20120620 218 190 -- -- -- 

16dd 01 422351109411901 20120717 299.13 -- -- G -- 

16dd 02 422351109411902 20120627 363 270 290 20 -- -- 

310 330 20

14cbd02 422357109394801 20120613 128.5 -- -- -- -- 

17adb01 422408109350001 20120613 900 -- -- -- 0 

16bac01 422431109490001 20120620 75 -- -- G -- 

13aa 01 422436109444601 20120621 575 230 270 40 G 20 

415 435 20 G

08ddb01 422446109423501 20120717 600 -- -- G -- 

15aca01 422452110013101 20120802 209.83 100 110 10 -- 0 

165 215 50

08aac01 422513109353401 20120613 534.98 210 587 377 G -- 

01dcb01 422600109523501 20120619 180 -- -- -- 0 

36cdb01 422615109395001 20120731 79.15 -- -- G -- 

33ddb01 422618109500401 20120620 252.87 -- -- -- -- 

33cca01 422651109044801 20120621 155 121 155 34 G 0 

35aab01 422722110014401 20120718 105 82 95 13 -- -- 

28dca01 422740110041701 20120621 336 280 336 56 G -- 

23cd 01 422747109481601 20120619 359.59 -- -- G -- 

24cab02 422801109401001 20120731 423.7 325 345 20 -- -- 

20cdb01 422811109514701 20120717 359.55 -- -- G -- 

21bcb01 422812109435001 20120731 370.84 283 295 12 G 1 

350 365 15

22bcd01 422838109564501 20120621 749.69 404 698 294 G 20 

17dcc01 422840109372101 20120628 66.05 -- -- G 0 

10dad01 422951109344501 20120628 102 55 102 47 G 0 

08acb01 422954109444201 20120731 19 278 259 G 0 

08acb02 422959109443601 20120731 349.85 -- -- G -- 

11cda01 423000109551501 20120621 55 90 35 -- 0 

08bcb01 423016109520801 20120618 214.87 140 160 20 -- -- 

180 220 40

05dbb01 423033109371901 20120628 200 146 200 54 G -- 

06bcb01 423055109530501 20120802 174 145 170 25 G 0 
Table 4 25

Table 4. Summary of candidate credible/suitable wells visited in the study area, 2012.—Continued

[LSD, Land surface datum; ft, foot; bls, below land surface; Type of surface seal: G, cement grout; --, not reported; B, bentonite; Z, other; Primary aquifer: LNEY, 

Laney Member of Green River Formation; FNNL, Farson Sandstone Member of the Green River Formation/Alkali Creek Tongue of the Wasatch Formation; EOCN, 

Eocene; WSTC, Wasatch Formation; NFRK, New Fork Tongue of Wasatch Formation; --, not assigned; CDBF, Cathedral Bluffs Tongue of Wasatch Formation; Water 

level status: P, pumping; F, flowing; R, recently pumped; Z, other; O, obstructed; Water level method: T, electric tape; --, water level not measured; S, steel tape; 

O, observed; Credible/suitable data objective met: C, critical common; 1, horizontal flow; 2 vertical gradient; 5, water-quality surface release; 6 water-quality 

excursion; Remarks: ft, foot; SE, southeast; shaded cells: tan, candidate well that could not be accessed to measure water level; blue, free flowing well]

Local 

well 

number

Primary 

aquifer

Water level, 

feet below 

LSD 

Water 

level 

status

Water 

level 

method

Credible/

suitable data 

objective met1

Site included 

in Trihydro 

network2

Remarks

25bab01 EOCN F O C, 1, 2, 6 No Flowing.

23bcc01 FNNL 67.50 S C, 1, 2, 5, 6 No Not pumping; trough dry.

16dd 01 FNNL 149.11 T C, 6 No Old well; abandoned.

16dd 02 FNNL 56.69 T C, 1, 2, 6 No Not pumping; trough dry.

14cbd02 LNEY 97.76 Z S C, 6 No Not pumping; trough dry.

17adb01 WSTC F O C, 1, 2, 6 Yes Flowing.

16bac01 LNEY 27.18 S C, 6 Yes Not pumping; trough dry.

13aa 01 FNNL O S C, 1, 2, 6 No Could not measure water level.

08ddb01 EOCN 339.09 P T C, 6 No --

15aca01 FNNL 96.85 T C, 1, 2, 5, 6 No Not pumping; trough dry.

08aac01

01dcb01

FNNL

FNNL

113.46

44.52 P

S

S

C, 1, 2, 6

C, 6

No

No

Not pumping.

--

36cdb01 FNNL 37.90 T C, 6 No Not pumping; trough dry.

33ddb01 FNNL 152.67 P S C, 6 Yes Pumping upon arrival for site visit.

33cca01 WSTC F -- C, 1, 2, 6 Yes Flowing, fields flooded until August, no access to 

well until that time.

35aab01 WSTC Z -- C, 1, 2, 5, 6 No Well shot up; may be able to access.

28dca01 WSTC F O C, 1, 2, 6 Yes Flowing.

23cd 01 FNNL 12.59 P S C, 6 No Pumping upon arrival for site visit.

24cab02

20cdb01

FNNL

FNNL

297.99

281.49

S

S

C, 1, 2, 6

C, 6

No

No

Not pumping; trough dry.

Not pumping; trough dry.

21bcb01 FNNL 272.62 S C, 1, 2, 6 No Not pumping; trough dry.

22bcd01

17dcc01

WSTC

FNNL

242.54

34.35

T

T

C, 1, 2, 6

C, 6

No

No

Open hole.

Not pumping; trough dry.

10dad01 FNNL 25.10 P T C, 1, 2, 5, 6 No --

08acb01 -- Z -- C, 1, 2, 5, 6 No No access for water level; needs to be drilled.

08acb02 FNNL 103.68 P T C, 6 Yes --

11cda01

08bcb01

--

FNNL 125.34

P S

S

C, 1, 2, 5, 6

C, 1, 2, 5, 6

Yes

Yes

Not able to measure water level because of 

pumping.

Not pumping; trough dry.

05dbb01 FNNL O -- C, 1, 2, 5, 6 No Cannot access to get water level.

06bcb01 FNNL 114.64 T C, 1, 2, 5, 6 No Not pumping; trough dry.
26 Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012

Table 4. Summary of candidate credible/suitable wells visited in the study area, 2012.—Continued

[LSD, Land surface datum; ft, foot; bls, below land surface; Type of surface seal: G, cement grout; --, not reported; B, bentonite; Z, other; Primary aquifer: LNEY, 

Laney Member of Green River Formation; FNNL, Farson Sandstone Member of the Green River Formation/Alkali Creek Tongue of the Wasatch Formation; EOCN, 

Eocene; WSTC, Wasatch Formation; NFRK, New Fork Tongue of Wasatch Formation; --, not assigned; CDBF, Cathedral Bluffs Tongue of Wasatch Formation; Water 

level status: P, pumping; F, flowing; R, recently pumped; Z, other; O, obstructed; Water level method: T, electric tape; --, water level not measured; S, steel tape; 

O, observed; Credible/suitable data objective met: C, critical common; 1, horizontal flow; 2 vertical gradient; 5, water-quality surface release; 6 water-quality 

excursion; Remarks: ft, foot; SE, southeast; shaded cells: tan, candidate well that could not be accessed to measure water level; blue, free flowing well]

Local 

well 

number

Site number Measurement 

date

Well depth, 

feet below 

LSD

Depth to top of 

open interval, 

ft bls

Depth to bottom 

of open interval, 

ft bls

Length of 

open interval, 

ft bls

Type of 

surface 

seal

Depth to bottom 

of surface seal, 

ft bls

32aca01 423140109370301 20120628 222.5 199 228 29 G -- 

19cab01 423320109525701 20120628 555 325 330 5 G 1 

530 550 20

19cb 01 423312109461701 20120627 338.63 -- -- G -- 

23acd01 423320109405601 20120627 375 -- -- G -- 

21bda01 423325109433501 20120627 503.9 -- -- -- -- 

24bdb01 423328109330901 20120627 150 80 100 20 G 64 

13cba01 423408109331501 20120627 250 168 188 20 G 0 

188 260 72

14cab01 423416109482101 20120718 810 420 450 30 G 200 

550 570 20

660 690 30

760 780 20

06ddb01 423539109382201 20120627 146.61 80 90 10 G -- 

140 153 13

05aca01 423630109512501 20120627 55 40 52 12 Z 25 

1

 See table 1 for full definition of each credible/suitable data objective.

2

 Trihydro Corporation (2011 and 2012).
Table 4 27

Table 4. Summary of candidate credible/suitable wells visited in the study area, 2012.—Continued

[LSD, Land surface datum; ft, foot; bls, below land surface; Type of surface seal: G, cement grout; --, not reported; B, bentonite; Z, other; Primary aquifer: LNEY, 

Laney Member of Green River Formation; FNNL, Farson Sandstone Member of the Green River Formation/Alkali Creek Tongue of the Wasatch Formation; EOCN, 

Eocene; WSTC, Wasatch Formation; NFRK, New Fork Tongue of Wasatch Formation; --, not assigned; CDBF, Cathedral Bluffs Tongue of Wasatch Formation; Water 

level status: P, pumping; F, flowing; R, recently pumped; Z, other; O, obstructed; Water level method: T, electric tape; --, water level not measured; S, steel tape; 

O, observed; Credible/suitable data objective met: C, critical common; 1, horizontal flow; 2 vertical gradient; 5, water-quality surface release; 6 water-quality 

excursion; Remarks: ft, foot; SE, southeast; shaded cells: tan, candidate well that could not be accessed to measure water level; blue, free flowing well]

Local 

well 

number

Primary 

aquifer

Water level, 

feet below 

LSD 

Water 

level 

status

Water 

level 

method

Credible/

suitable data 

objective met1

Site included 

in Trihydro 

network2

Remarks

32aca01 FNNL 135.92 T C, 1, 2, 5, 6 No Not pumping; trough dry.

19cab01 WSTC 314.42 S C, 1, 2, 6 No Not pumping; trough dry.

19cb 01 FNNL 171.20 T C, 6 No Not pumping; trough dry.

23acd01 FNNL Z -- C, 6 No Well capped but could be measured if drilled 

access.

21bda01 WSTC 67.95 T C, 6 No Not pumping; trough dry.

or 

FNNL

24bdb01 CDBF 48.11 T C, 1, 2, 5, 6 No Pumping upon arrival for site visit.

13cba01 FNNL 67.28 T C, 1, 2, 5, 6 No Open hole.

14cab01 WSTC Z -- C, 1, 2, 6 No Well capped.

06ddb01 FNNL 67.26 T C, 1, 2, 5, 6 No Not pumping; trough dry.

05aca01 NFRK Z -- C, 1, 2, 5, 6 No Well capped.
Publishing support provided by the: 

Rolla Publishing Service Center

For more information concerning this publication, contact: 

Director, Wyoming Water Science Center 

U.S. Geological Survey 

521 Progress Circle, Suite 6 

Cheyenne, Wyoming 82007 

(307) 778-2931

Or visit the Wyoming Water Science Center Web site at: 

http://wy.water.usgs.gov/

Sweat—Groundwater Well Assessment for the Normally Pressured Lance Natural Gas Project, Wyoming, 2012—Data Series 770