USGS WRIR 00-4014 Table 1

Table 1. Characteristics of selected wells on Pahute Mesa and vicinity, Nevada Test Site

Land-surface altitude: Altitude relative to sea level.
Open interval: Area of well that is open to aquifer and where, if saturated, ground water may enter well. Open interval typically consists of open borehole and(or) well screen.
Stratigraphy of open interval below saturated zone: Mch, Chainman Shale; pre-Tb, pre-Belted Range Group volcanics; Ta, Calico Hills Formation; Tb, Belted Range Group; Tc, Crater Flat Group; Tm, Timber Mountain Group; Tp, Paintbrush Group.

USGS well name

USGS site
identification
number¹

Nevada Test Site
hole name²

Latitude
(ddmmss)

Longitude
(dddmmss)

Land-
surface altitude
(feet)

Depth drilled

Top of open interval

Bottom of open interval

Stratigraphy
of open
interval below
saturated zone

Water-level trends analyzed

(feet below land surface)

Area 18

UE-18r

370806116264001

UE-18r

370805

1162641

5,538

5,004

1,629

5,004

yes

UE-18t

370741116194501

UE-18t

370741

1161945

5,201

2,600

1,896

2,600

yes

WW-8

370956116172101

Water Well 8

370956

1161721

5,695

5,499

1,250

1,780

yes

Area 19

ER-19-1-1 (deep)

371043116142101

ER-19-1

371043

1161421

6,140

3,595

3,210

3,560

Mch

ER-19-1-2 (middle)

371043116142102

ER-19-1

371043

1161421

6,140

3,595

2,550

2,738

pre-Tb

ER-19-1-3 (shallow)

371043116142103

ER-19-1

371043

1161421

6,140

3,595

1,301

1,422

pre-Tb

U-19ab

371512116193101

U-19ab

371512

1161931

6,928

2,250

U-19ai

371929116185501

U-19ai

371929

1161855

6,742

2,075

U-19aq

371341116222901

U-19aq

371341

1162229

6,798

2,175

U-19ar

371643116212001

U-19ar

371643

1162120

6,707

2,200

U-19au

371509116223601

U-19au

371509

1162236

6,534

2,200

U-19ax

371750116182401

U-19ax

371750

1161824

6,986

2,200

U-19ay

371632116211301

U-19ay

371632

1162113

6,712

2,156

U-19az

371339116221601

U-19az

371339

1162216

6,753

2,130

yes

U-19ba

371746116184601

U-19ba

371746

1161846

7,037

2,177

U-19bg 1

371620116213501

U-19bg #1

371620

1162135

6,694

2,250

Tp, Ta

U-19bh

371349116222001

U-19bh

371349

1162220

6,768

2,148

yes

U-19bj

371736116184701

U-19bj

371736

1161847

7,035

2,153

yes

U-19bk

371714116230301

U-19bk

371714

1162303

6,670

2,198

no data

yes

U-19g

371836116215101

U-19g

371836

1162151

6,734

3,292

3,231

3,250

Tc, Tb

U-19v PS 1D³

371453116205751

U-19v PS #1D

371453

1162057

6,842

3,837

3,618

3,627

Ta, Tc

yes

UE-19c WW

371608116191002

UE-19c Water Well

371608

1161910

7,033

8,489

2,421

8,489

yes

UE-19e WW

371750116195901

UE-19e/Inst.

371750

1161959

6,919

6,005

2,475

6,005

Tc, Tb

UE-19gS WW

371830116215303

UE-19gS

371830

1162153

6,719

7,500

2,650

7,500

Tc, Tb

UE-19h

372034116222504

UE-19h

372034

1162225

6,780

3,705

2,050

2,283

yes

UE-19z

371758116193601

UE-19z/Inst.

371758

1161936

6,888

2,800

Area 20

ER-20-1

371321116292301

ER-20-1

371321

1162929

6,181

2,065

1,940

2,065

yes

ER-20-2-1

371246116240101

ER-20-2 #1

371246

1162401

6,670

2,524

2,303

2,524

yes

PM-1

371649116242102

Pahute Mesa Ex. Hole #1

371649

1162421

6,558

7,858

7,543

7,731

Tb, pre-Tb

yes

PM-2

372042116340501

Pahute Mesa Ex. Hole #2

372042

1163405

5,592

8,788

2,506

8,788

pre-Tb

yes

U-20 WW

371505116254501

U-20 Water Well

371505

1162545

6,468

3,268

2,271

3,268

yes

U-20ah

371521116252001

U-20ah

371521

1162520

6,445

2,300

U-20ai

371551116262501

U-20ai

371551

1162625

6,503

2,154

U-20ak

371452116292101

U-20ak

371452

1162921

6,235

2,100

U-20an

371750116262701

U-20an

371750

1162627

6,462

2,026

U-20ar 1

371852116281701

U-20ar #1/Inst.

371852

1162817

6,319

2,285

109

2,285

Tm, Ta

U-20as

371313116274201

U-20as

371313

1162742

6,227

2,100

U-20at 1

371452116303301

U-20at 1

371452

1163033

6,241

2,197

no data

U-20av

371359116252301

U-20av

371359

1162523

6,464

2,100

U-20aw

371658116244401

U-20aw

371658

1162444

6,585

2,100

U-20ax

371350116264701

U-20ax

371350

1162647

6,536

2,200

yes

U-20ay

371536116262801

U-20ay

371536

1162628

6,520

2,100

U-20az

371352116243401

U-20az

371352

1162434

6,573

2,250

U-20bb (shallow)

371452116293901

U-20bb

371452

1162939

6,226

1,900

U-20bb (deep)

371452116293902

U-20bb

371452

1162939

6,226

2,220

Tm, Tp

U-20bb 1

371452116293903

U-20bb #1

371451

1162939

6,226

2,345

U-20bc

371547116292601

U-20bc

371547

1162926

6,146

2,000

U-20bd

371542116251203

U-20bd

371542

1162512

6,486

2,261

Tp, Ta

U-20bd 1

371542116251301

U-20bd #1

371542

1162513

6,486

2,402

114

2,402

Tp, Ta

U-20bd 2

371542116251202

U-20bd #2

371542

1162512

6,487

2,450

Tp, Ta

U-20be

371332116254101

U-20be

371332

1162541

6,492

2,220

yes

U-20bf

371444116263001

U-20bf

371444

1162630

6,522

2,250

yes

U-20bg

371414116242901

U-20bg

371414

1162429

6,567

2,200

yes

U-20n PS 1DD-H³

371425116252401

U-20n PS #1DD-H

371425

1162524

6,468

4,253

2,577

2,869

Tm, Ta

yes

U-20y

371315116282701

U-20y

371315

1162827

6,257

2,602

UE-20ab

371623116243701

UE-20ab

371623

1162437

6,581

2,550

UE-20av

371401116252001

UE-20av

371401

1162520

6,458

2,614

133

2,614

Tm, Tp, Ta

UE-20bh 1

371442116243301

UE-20bh #1

371442

1162433

6,637

2,810

1,936

2,810

yes

UE-20e 1

371901116272501

UE-20e #1

371901

1162725

6,297

6,395

1,500

6,395

Ta, Tc, Tb

UE-20f

371617116291701

UE-20f

371617

1162917

6,116

13,686

4,456

13,686

Tc, Tb, pre Tb

UE-20h WW

371618116260201

UE-20h Emplacement Hole

371619

1162602

6,557

7,207

2,506

7,207

Ta, Tc

UE-20n 1

371425116251902

UE-20n #1

371425

1162519

6,461

3,300

2,282

2,834

yes

Off site

PM-3

371421116333702

Pahute Mesa #3

371421

1163337

5,823

3,019

1,473

3,019

Tm, Tp, Ta, Tc, Tb, pre-Tb

yes

PM-3-1

371421116333703

Pahute Mesa #3

371421

1163337

5,823

3,019

1,872

2,192

yes

PM-3-2

371421116333704

Pahute Mesa #3

371421

1163337

5,823

3,019

1,379

1,687

yes

^1. The U.S. Geological Survey system for site-identification is based on the latitude-longitude grid. Each site is identified by a unique 15-digit number: the first six digits denote degrees, minutes, and seconds of latitude; the next seven digits denote degrees, minutes, and seconds of longitude; and the last two digits are the sequence number of the well or test hole within the 1-second grid of latitude and longitude. The assigned number is retained as a permanent identifier even if a more precise latitude and longitude are later determined. To determine the geographic location of a well or test hole, the latitude and longitude coordinates should be used rather than the site identifier.

^2. Official Nevada Test Site hole names are assigned to test holes according to the type of hole drilled, site location (NTS area number), and sequence code for consecutive order in which the hole was drilled or redrilled. Holes drilled on the Nevada Test Site begin with the letter "U". Exploratory holes, drilled to assess material properties within a defined area, are designated with an "E" following the "U." The "U" or "UE" are followed by a dash (-), NTS area number, and sequence code (letters "a-z, aa-az, ba-bz, ..., za-zz"). The suffix "PS" indicates a post-shot hole, the suffix "Inst." indicates an instrumented hole, and the suffix "#" followed by a number indicates a satellite hole. Exceptions to the standard naming convention are wells beginning with "ER," which indicates an environmental restoration well, and wells beginning with "Pahute Mesa" that have the suffix "#" followed by a number, which indicates the number of the hole rather than a satellite hole.

^3. Depth drilled and open intervals are corrected for hole slant.