Annual ReportOf The

State InspectorOf

MinesOf

WYOMING

Year Ending

December 31, 2016

THE STATE OF WYOMING MATTHEW MEAD

GOVERNOR

TERRY W. ADCOCK

State Inspector of Mines

Department of Workforce ServicesOFFICE OF MINE INSPECTOR

P. O. Box 1094Rock Springs, WY 82902

TELEPHONE 307-362-5222 FAX 307-362-5233

December 31, 2016

The Honorable Matthew Mead

Governor of Wyoming

State Capitol Building

Cheyenne, WY 82002

Dear Governor Mead:

Persuant to Wyoming Compiled Statutes of 1995, relating to mining, I have the honor to transmit herewith the Annual Report of the State Inspector of Mines for the year 2016.

Respectfully submitted,

Terry W. Adcock

State Inspector of Mines

1

MATTHEW MEAD

Governor of Wyoming - 2016

2

STATE MINE INSPECTOR'S OFFICE PERSONNEL

Name Title Location

Adcock, Terry W. State Inspector of Mines Rock Springs

Ashley, Cary D. Deputy Inspector of Mines (Coal) Casper

Bailey, Doug Deputy Inspector of Mines Gillette

Crumrine, Mark A. Deputy Inspector of Mines Cody

Gomez, Gary Deputy Inspector of Mines Rock Springs

Mulinix, Rob Deputy Inspector of Mines Rock Springs

Goplerud, Rebecca E. Executive Assistant Rock Springs

This office is a division of the Department of Workforce Services, and is located in Rock Springs, WY. It is the responsibility of this office to administer the State Statutes pertaining to the health and safety of the miners, and to recommend legislative changes in such regulations when needed.

Pursuant to these statutes, each mining operation in the State is inspected for compliance several times each year, and all fatal or serious accidents are investigated. Complaints by employees of unsafe working conditions are also investigated.

State Statutes also created the Mining Council, composed of 10 members and the State Inspector of Mines. The membership is composed of 5 management and 5 hourly representatives from various types of mining operations. The members of the Council act in conjunction with the State Inspector of Mines to improve the health and safety in the mines of this state.

The State Mining Council is also responsible for the certification of underground and surface mine foreman and mine examiners as required by State Statutes. The members of the Mining Council are:

Barker, Christopher G. Hourly, UG Coal

Ciner Wyoming LLC

Green River, WY

Burd, Michael K. Hourly, Trona

Tronox Alkali Corp

Green River, WY

Dillinger, Phillip Hourly, Coal

Alpha Coal West, Inc.

Gillette, WY

Dorn, Donald S. Hourly, Coal - President

Thunder Basin Coal-Black Thunder

Gillette, WY

3

Johnson, Alan Management, Coal

Cloud Peak Energy

Gillette, WY

Musbach, Timothy E. Management,Trona

Ciner Wyoming LLC

Green River, WY

Pacheco, Robert J. Hourly, Coal

Black Butte Coal Company

Point of Rocks, WY

Rhoades, Christine Management, Coal

Cloud Peak Energy

Gillette, WY

Ritter, Brett Management, Coal

Westmoreland Coal Co.

Kemmerer, WY

Waterhouse, Tom R. Management, Sand & Gravel

Evans Construction Company

Jackson, WY

4

2016 - EXECUTIVE SUMMARY

Fatalities

THERE WERE NO FATALITIES ON MINE SITES IN 2016.

Lost Time Accidents

Operations:2016 - 48 Lost Time Accidents2015 - 68 Lost Time Accidents2014 - 51 Lost Time Accidents

Contractors:2016 - 8 Lost Time Accidents2015 - 13 Lost Time Accidents2014 - 12 Lost Time Accidents

Total:2016 - 56 Lost Time Accidents2015 - 81 Lost Time Accidents2014 - 63 Lost Time Accidents

We had a total of 107 companies that worked at least 10,000 hours or more without a lost time accident in 2016.

5

Production and Employee Data

2016 - Coal Production - 297,501,894 tons2015 - Coal Production - 375,694,995 tons2014 - Coal Production - 392,751,713 tons

2016 - Coal Employment - 5,682 employees2015 - Coal Employment - 6,646 employees2014 - Coal Employment - 6,578 employees

2016 - Trona Production - 17,507,981 tons2015 - Trona Production - 17,325,244 tons2014 - Trona Production - 17,080,070 tons

2016 - Trona Employment - 2,284 employees2015 - Trona Employment - 2,483 employees2014 - Trona Employment - 2,313 employees

2016 - Bentonite Production (plant) - 3,904,156 tons (mine) - 3,285,137 tons2015 - Bentonite Production (plant) - 3,999,193 tons (mine) - 3,669,228 tons2014 - Bentonite Production (plant) - 4,130,643 tons (mine) - 4,983,400 tons

2016 - Bentonite Employment - 631 employees2015 - Bentonite Employment - 688 employees2014 - Bentonite Employment - 729 employees

State Mine Inspector Health and Safety Inspections

2016 - 910 Health and Safety Inspections conducted2015 - 913 Health and Safety Inspections conducted2014 - 955 Health and Safety Inspections conducted

6

Sub-Part Violation Discription

30 30-3-107 Inspections for safety hazards.

30 30-2-209 Inspections; reports; posting and distribution; interim reports.

30 30-2-402 Annual report to inspector; contents.

30 30-2-207 Access to mining operations, etc.; penalty for refusal of access or obstruction; enforcement by injunction; misrepresentation of facts or information to inspector; obstruction of inspector or deputy.

30 30-2-101 Definitions.

30 30-2-208 Inspections; when held; duties of inspector or deputy; authority to clear unsafe mine or portion thereof.

30 30-3-105 Bulletin boards to be maintained for posting rules and regulations.

56 56.14112 Construction and maintenance of guards.

56 56.9300 Berms or guardrails.

56 56.16004 Containers for hazardous materials.

56 56.14101 Brakes.

56 56.11003 Construction and maintenance of ladders.

56 56.12019 Access to stationary electrical equipment or switchgear.

56 56.4104 Combustible waste.

57 57.4104 Combustible waste.

57 57.14112 Construction and maintenance of guards.

57 57.12030 Correction of dangerous conditions.

57 57.10004 Brakes.

57 57.3200 Correction of Hazardous conditions.

57 57.22305 Approved equipment (III mines).

57 57.6900 Damaged or deteriorated explosive material.

77 77.1104 Accumulations of combustible materials.

77 77.1713 Daily inspection of surface coal mine; certified person; reports of inspection.

77 77.505 Cable fittings; suitability.

77 77.412 Compressed air systems.

77 77.1304 Blasting agents; special provisions.

77 77.411 Compressed air and boilers; general.

77 77.603 Clamping of trailing cables to equipment.

Frequently Cited Violations - By Regulation Sub Part

7

Training

Mine Safety and Health Training is available at the Northern Wyoming Community College District, Gillette College and at the Western Wyoming Community College, Green River Campus. These certified instructors conduct training on campus and also travel throughout the state upon request.

The programs currently available from certified instructors are:

Annual Refresher TrainingNew Miner TrainingImpoundment Re-certificationElectrical Certification ReviewElectrical Re-certificationMine Foreman Certification ReviewSurface Coal Shot-Firer Re-certificationInstructor Training for CertificationAccident Investigation and PreventionPart 56/57 TrainingPart 77 TrainingPart 46 TrainingPart 47 Haz-Com TrainingPart 62 Noise TrainingFirst Respondor TrainingFirst AidC.P.R.

8

2016 - MINE FOREMAN CERTIFICATION

The Wyoming Mining Council is responsible for the certification of Mine Foreman in the state. 212 certificates were awarded for 2016.

Surface Coal Foreman

Aguilera, Jesus A5400

Anderson, Timothy A5403

Bettcher, David A5407

Black, Kristopher A5409

Blakeman, Brian A5410

Blau, Coltin A5411

Boyer, David A5412

Brandenburg, Scott A5413

Briggs, Trevor A5414

Brooks, Kayce A5416

Brown, Ryan A5417

Bulgrin, Brooke A5419

Bull, Mario A5420

Burget, Daniel A5421

Capicotto, Jessica A5426

Carter, Robert A5427

Coil, Nathan A5431

Comer, Rick A5434

Cook, Billy A5435

Cook, Tyler A5436

Dahlhausen, Joseph A5445

Davis, Vince A5447

Dawson, John A5448

DeShaw, Kyle A5450

Doell, Brandon A5451

Doherty, Travis A5452

Domogalski, Robert A5453

Dwyer, Timothy A5458

Edwards, Michelle A5460

Fulton, Joel A5467

Ganje, Brent A5468

Gardner, Joseph A5469

Garner, Mike A5470

Golliher, Joseph A5471

Greenwald, Logan A5472

Griffith, Marcus A5473

Guma, Vasilii A5476

Habets, Jared A5477

Hagemann, Merle A5480

Hahn, Jason A5481

Hannah, Robbin A5483

Lindstrom, Matthew A5537

Livingston, Machel A5538

Long, Mitchell A5539

Looney, Zachary A5540

Love, Lana A5541

Lulich, Jeffery A5543

Lynch, Tom A5544

Mackenzie, Dawn A5545

Malone, Casey A5546

Mazzola, Ray A5549

McAtee, Patrick A5550

McGee, Anthony A5553

Melendez Lainez, Shana A5558

Milliken, Jamie A5559

Murray, Logan A5564

Nabb, Richard A5565

Nichols, Jordan A5566

Niles, Justin A5567

Norton, Justin A5568

Olsen, Dylon A5569

Ordeman, Scott A5570

Owens, Dave A5571

Packard, Craig A5572

Pearson, Randy A5573

Porter, Galen A5576

Rasmussen, Chris A5582

Reed, Jeremy A5584

Reed, Kevin A5585

Reichard, James A5586

Reynolds, Tina A5587

Salmon, Dustin A5594

Schaub, Lawrence A5595

Schipman, Jacob A5596

Schipman, Terrance A5597

Schmelzle, Robert A5598

Schmidt, Brian A5599

Schroeder, Matthew A5601

Schultz, Christopher A5604

Sellers, Ty A5607

Shamion, Jeffrey A5608

Sherman, Greg A5609

9

Harrison, Shannon A5484

Hart, Tell A5485

Hein, Evelyn A5486

Henderson, Patrick A5487

Hendrickson, Joshua A5488

Henwood, Josh A5489

Herman, Nicholas A5490

Herrera, Paul A5491

Hibbs Jr., Lonnie A5492

Hickman, Scott A5493

Hill, Thomas A5494

Hiser, Charles A5495

Huestis, Kurt A5497

Hull, Robert A5499

Hyttinen, Brian A5502

Ilinitchii, Ion A5503

Jahner, David A5505

James, Jared A5506

Jarvi, Luke A5509

Jeppesen, Joseph A5513

Johnsen, Kent A5514

Johnson, Craig A5515

Jonas, Tracy A5516

Jones, Tracey A5517

Juhala, Ezekiel A5519

Klindt, Jeff A5522

Knight, Ryan A5523

Lamphere, Brian A5525

Lawson, Billy A5526

Leeper, Crystal A5531

Leibel, Jesse A5532

Lincoln, Randy A5536

Shirley, Michael A5611

Shurter, Kenneth A5612

Sieler, Bryan A5613

Sisson, Vance A5614

Snyder, Mark A5615

Sobania, Steven A5616

Spann, Larry A5618

Stack, Brent A5619

Stevens, Josh A5621

Stewart, William A5622

Stone, Brady A5625

Strahan, Brandan A5627

Strahan, Kathryn A5626

Tate, Clinton A5629

Tedesko, Wayne A5630

Thomas, Jeremy A5631

Thompson, Clifford A5634

Tibbs, Jonathon A5635

Timmons, Riley A5636

Vauthier, Jaye A5638

Volmer, Kyle A5641

Vossler, Jerry A5642

Wagner, Brady A5643

Wellborn, Allen A5649

Wibbels, Cole A5652

Williams, Bryon A5654

Williams, Jeffrey A5655

Wintermote, Josh A5659

Yeager, Fred A5661

Zahrowski, Chad A5664

Zuck, Aaron A5667

Zwetzig, Travis A5668

Surface Metal/Non-Metal Foreman

Bagley, Don A5404

Brog, Tyler A5415

Decora, Jason A5449

Hamann, Brian A5482

Hokanson, Bob A5496

Izatt, George A5504

Jenkins, Cory A5510

Kunz, Trevor A5524

Lewis, Shadow A5533

Loveland, James A5542

Phelps, Royce A5574

Price, Anthony A5579

Rasmusson, Markus A5583

Spalding, Miken A5617

Stephens, Guy A5620

Stumpp, Kelly A5628

Titensor, Brandon A5637

Widmer, Don A5653

Wolfley, Rick A5660

Underground Metal/Non-Metal Foreman

Walton, Josh A5645

10

Underground Coal Mine Foreman

Collins, Robert A5433

Guerrero, Ray A5475

Leber, Joseph A5530

McClanahan, Ferlin A5552

Meadows, Chris A5557

Scovill, Steve A5606

Stoffers, Brian A5624

Ward, Dallyn A5647

Whitaker, William A5651

Zserai, Eric A5666

Underground Trona Mine Foreman

Almquist, Gust A5402

Bauer, Matthew A5406

Cannon, Adam A5423

Cannon, Paul A5425

Coe, Justin A5430

Cornish, David A5438

Cox, Brett A5440

Cuin, Mathew A5442

Cushing, Stephen A5444

Driskell, Jeremy A5455

Dumm, Michael A5457

Fairbanks, Brent A5462

Fisher, Adam A5464

Fisher, Thomas A5466

Hadden, Francis A5479

Huntington, Melvin Jarod A5501

Jaques, Josh A5508

Jensen, Zackery A5512

Kindall, Rick A5521

Leavitt, Cory A5528

Lewis, John A5535

Manzanares, Christopher A5548

Mead, Jacob A5555

Mills, Nicholas A5561

Miracle, Steven A5563

Potter, Joseph A5578

Ramsey, Jon A5581

Riley, Trent A5589

Robinson, Christopher A5591

Roper, Daniel A5593

Schuh, Jason A5603

Thomas, George A5633

Viers, Robert A5640

Welch, Robert A5648

Winner, Jesse A5658

Yingling Jr., Robert A5663

Certifications awarded for 2016: 212

11

2016 - EXAMINER CERTIFICATION

The Wyoming Mining Council is responsible for the certification of Mine Examiners in the state. 57 certificates were awarded for 2016.

Underground Coal Mine Examiner

Bias, Leo A5408

Collins, Robert A5432

Guerrero, Ray A5474

Huitt, Curtis A5498

Juarez, Roman A5518

Leber, Joseph A5529

McClanahan, Ferlin A5551

Meadows, Chris A5556

Porter, Matthew A5575

Schnebeck, Nathan A5600

Scovill, Steve A5605

Stoffers, Brian A5623

Ward, Dallyn A5646

Whitaker, William A5650

Willson, Carl A5656

Zserai, Eric A5665

Underground Trona Mine Examiner

Almquist, Gust A5401

Bauer, Matthew A5405

Cannon, Adam A5422

Cannon, Paul A5424

Coe, Justin A5429

Cornish, David A5437

Cox, Brett A5439

Cuin, Mathew A5441

Cushing, Stephen A5443

DaRif, Kyle A5446

Driskell, Jeremy A5454

Dumm, Michael A5456

Fairbanks, Brent A5461

Fisher, Adam A5463

Fisher, Thomas A5465

Hadden, Francis A5478

Huntington, Melvin Jarod A5500

Jaques, Josh A5507

Jensen, Zackery A5511

Kindall, Rick A5520

Leavitt, Cory A5527

Lewis, John A5534

Manzanares, Christopher A5547

Mead, Jacob A5554

Mills, Nicholas A5560

Miracle, Steven A5562

Potter, Joseph A5577

Ramsey, Jon A5580

Riley, Trent A5588

Robinson, Christopher A5590

Roper, Daniel A5592

Schuh, Jason A5602

Thomas, George A5632

Viers, Robert A5639

Winner, Jesse A5657

Yingling Jr., Robert A5662

Underground Metal/Non-Metal Examiner

Walton, Josh A5644

Surface Coal Examiner

Brown, Allan A5418

Clemons, Gary A5428

Earley, Dalton A5459

Shinkle, Randy A5610

Certifications awarded for 2016: 57

12

2016 - QUALIFIED PERSON CERTIFICATION

This certification is the result of legislation that was passed during 1998. The certified person is allowed to test for the presence of methane gas prior to welding or using open flame in an underground coal or trona mine. 5 certificates were awarded for 2016.

NAME CERTIFICATE #

Anderson, Thomas 1663

Frazier, Brandon 1664

Padilla Jr., Louis Georgie 1665

Schmaltz, Kyle 1667

Weinreich, Josh 1666

Certifications awarded for 2016: 5

13

2016 - SHOT-FIRER CERTIFICATION

The State Inspection of Mines office is responsible for the certification of all blasters working in the mines in Wyoming. Several different categories of certification are offered to meet the needs of the various types of mines. This office cooperates with DEQ/LQD in administering the shot-firer program for surface coal. 14 certificates were awarded for 2016.

NAME CERTIFICATE #

Bauer, Matthew 7502

Cannon, Adam 7505

Cannon, Paul 7506

Dumm, Michael 7503

Dye, Doug 7514

Hays, Anthony 7510

Lujano, Albert 7511

Odle, Mike 7515

Perkins, Josh 7512

Robinson, Christopher 7507

Staley, Alan 7509

Volsey, Jay 7508

Winebrenner, Cole 7513

Yingling, Robert 7504

Certifications awarded for 2016: 14

14

2016 - CONTRACTOR CERTIFIED PERSON

This certification is the result of new rule making in 2008. This certified person is qualified to perform work place examination at surface coal mines for contractor work areas. 143 certificates were awarded for 2016.

NAME CERTIFICATE #

Ackerman, Nate 1353

Adkins, Kristien 1331

Aguilar, John 1280

Altebaumer, James 1339

Anderson, Rick 1286

Antonucci, Nicholas 1351

Applegate, Kenneth 1277

Baliles, Aaron 1358

Bigman, Jerry 1355

Brening, Jeremy 1390

Brown, Grant 1316

Bustos, Scott 1317

Butler, Michael 1380

Carrick, Stan 1291

Chandler, Dave 1343

Chandler, Justin 1344

Christman, Robert 1349

Clark, Kristopher 1399

Clegg, Christopher 1325

Clifton, Keith 1300

Coleman, Miranda 1359

Collins Jr., Gary 1258

Collins Sr., Gary 1259

Cordova, Rickie 1318

Cowan, Joshua 1308

Cox, Taylor 1260

Cridlund, Paul 1321

Crook, Nathaniel 1284

Cryer, Ronald 1261

Damoni, Conrad 1262

Daniels, William 1342

Dean, Jeremy 1263

Delgado, Yahaira 1360

Dillon, Jesse 1365

Donathan, Holly 1312

Doyle, Ryan 1264

Drain, Jared 1265

Draper, Daniel 1370

Duran, Fernando 1287

Elenburg, James 1375

Elmore, John 1391

15

Exley, Anthony 1266

Fallon, Lloyd 1283

Fare, Daniel 1392

Fields, Melissa 1372

Fleming, Jesse 1279

Garcia, Steve 1294

Garoutte, Jeremy 1267

Garoutte, Matthew 1268

Giertych, Susan 1298

Gillespie, Clint 1376

Green, Alex 1288

Hansen, Shane 1381

Hart, Clint 1314

Henderson, Ashley 1324

Hendrickson, Jared 1309

Hess, Tammy 1368

Hogan, Amanda 1378

Hogen, Ulian 1374

Hoppe, Melissa 1373

Jackson, Connie 1362

Jacobsen, Rick 1336

James, Lynn 1356

Jellison, Kristopher 1301

Johnson, Jacob 1297

Johnson, Jesse 1299

Johnson, Justin 1302

Jones, Chrisopher 1313

Jorgensen, Gregory 1289

Jorgensen, Gregory 1289

Kavanagh, Declan 1319

Keller, Ehan 1285

Kjorstad, Marty 1382

Klatt, Kevin 1296

Knick, James 1361

Koenig, Jared 1307

Krotzer, Tammy 1326

Kucera, Joshua 1328

Kuhbacher, Steve 1269

Ladd, Clinton 1320

Lage, Jeramie 1281

Leatherberry, Norman 1270

Leingang, Zachary 1348

Lindskog, Vern 1352

Lux, Dorsey 1400

Maloney Jr., Opee 1393

Manus, Blake 1290

Martin, Joshua 1394

Martin, Kevin 1337

Martine, Shane 1271

Masters, Donnie 1340

16

Mathis, Nick 1329

Matte, Danielle 1333

Mayra, Naranjo 1363

McGovern, Jerry 1272

McPherson, Jenny 1278

Mendenhall, Timothly 1383

Mitchell, John 1357

Morales, Rosa 1345

Mueller, Kent 1346

Nelson, Brian 1338

Newman, Susan 1334

Nielsen, Casey 1387

Norby, Nickolas 1292

Nowack, Everett 1398

Nyhus, Frederick 1322

Olme, Gary 1323

Orozco, Michael 1282

Ploof, Joseph 1386

Pullman, Bren 1273

Quick, Kyle 1395

Radden, Charles 1341

Raue, Sean 1367

Reed, David 1330

Ridenour, Alvin 1310

Rosa, Bautista 1293

Ross, Seth 1366

Shellhammer, Michael 1389

Shobe, Barbara 1332

Skillings, Doug 1327

Smith, Erik 1274

Souders, William 1377

Stohel, Steve 1371

Sumner, Shannon 1275

Sweet, Allen 1303

Thormahlen, Lance 1354

Trandahl, Thomas 1350

Trentacosti, Ken 1384

Tystad, Vern 1335

Uhler, Joseph 1276

Urbanek, Ryan 1396

Utley, Steven Hunter 1315

Wass, Jared 1304

Wilcox, James 1369

Williams, Tony 1364

Williamson, Kyle 1311

Wintermote, Gene 1385

Wood, Heather 1306

Wynn, Ian 1388

Yoder, Justin 1397

Zahradka, Ryan 1347

17

Zeller, Shea 1305

Zwemer, Zan 1379

Certifications awarded for 2016: 143

18

2016 - SAFETY AWARDS

I would like to commend and congratulate the following companies and their employees for having worked the entire year of 2016, for 10,000 or more manhours, with no lost time accidents.

OPERATIONS MANHOURS

Cloud Peak Energy LLC/Cordero Rojo Mine - Cordero Rojo Mine 865,252

Contura Coal West LLC - Belle Ayr Mine 472,072

Pacific Minerals dba Bridger Coal Surface Operations - Bridger Coal Surface Mine

468,725

Mountain Cement Company - Mountain Cement Plant #1 330,622

Black Butte Coal Company - Black Butte Mine 327,272

Buckskin Mining Company - Buckskin Mining Company 321,263

Peabody Caballo Coal, LLC - Caballo Mine 314,210

Thunder Basin Coal Co. LLC/Coal Creek - Coal Creek Mine 286,626

Joy Global 249,778

Interstate Powersystems Inc. 222,813

Wyoming Machinery Company 196,828

Rail Link, Inc. 193,106

Peabody Caballo Coal, LLC - Rawhide Mine 182,500

GK Construction 173,824

Bentonite Performance Minerals, LLC-Colony - Colony Plant 157,319

Nelson Brothers Mining Services, LLC 152,723

Lewis & Lewis, Inc. - Pit 2 #652 145,652

Bentonite Performance Minerals, LLC - Lovell - BPM Lovell Mill 126,703

Savage Transportation Services 124,400

Black Hills Energy - Wyodak Mine - Wyodak Mine 117,819

WESCO 117,327

American Colloid Company - Lovell Mill 115,430

MI SWACO a Schlumberger Company - MI SWACO Greybull Plant 110,740

Tri State Construction LLC 102,209

19

OPERATIONS MANHOURS

TIC- The Industrial Company Wyoming, Inc 102,060

MI SWACO a Schlumberger Company - MI SWACO Greybull Mine 99,305

Searle Brothers Construction 89,679

American Colloid Company-Colony East - Colony East 82,781

Earth Work Solutions 82,223

Balfour Beatty Infrastructure, Inc. 82,182

Securitas Security Services USA, Inc 66,980

Dennis M. McCoy & Sons, Inc. 61,730

Big Horn Tire, Inc 61,704

American Colloid Company-Colony West - American Colloid Company 60,018

Watco/Black Thunder Switching 58,225

Black Rock Mine Service, LLC. 53,478

AKJ Nalco-Gillette 51,952

AECOM 51,608

Wyo-Ben, Inc. - Stucco Mill 47,064

SGS NA Minerals 46,796

Wyo-Ben, Inc. - Lucerne Mill 41,857

Barnum Inc. 40,810

Wyo-Ben, Inc. - Sage Creek Mill 37,259

Black Hills Bentonite - Harry Thorson Plant 37,076

Croell, Inc. - Quarry-Limestone 36,019

Bentonite Performance Minerals, LLC-Colony - Colony Mine 35,224

Jolley’s Trucking Inc. 34,655

Elwood Staffing Services, Inc. and its subsidiary SOS Staffing 33,812

SLS West, Inc. 31,604

Pete Lien & Sons, Inc. - 4801513 Wyoming Lime Products 30,590

Georgia Pacific Gypsum LLC - GP Gypsum Quarries 30,493

American Colloid Company - Yellow Tail Mine 30,365

Martin Marietta-Guernsey Quarry - Guernsey Quarry 29,116

20

OPERATIONS MANHOURS

Black Hills Bentonite - Kaycee Mine 28,202

North American Industrial Services 28,155

Wolf Mountain Coal, Inc. - Wolf Mountain Coal Co., Inc 26,907

Redi Services LLC 26,314

Black Hills Bentonite - Worland Plant 25,178

Alta Construction, Inc. 24,456

Cummins Rocky Mountain 24,349

Great Basin Industrial, LLC 24,329

Cate Equipment Company 23,877

Simon Contractors - Crusher #1 23,842

Redi Project Services LLC 23,472

Mountain State Rail Services, Inc. 23,396

Hladky Construction, Inc. 23,390

JTL Group, Inc. dba Knife River - Star Pit #1 22,973

Bodec Inc. 22,290

Homax Oil 22,200

Industrial Contractors Inc. 21,855

FireMaster 21,662

McGarvin-Moberly Construction Co. - Crusher #2 21,056

L&H Industrial 20,637

Cumberland Gap Hearthstone Inc. - Cumberland Gap Hearthstone 20,330

Arnold Machinery Company 19,739

Liebherr Mining Equipment 18,905

L. D. Anderson, Inc. 18,895

Komatsu Equipment Company 18,678

Croell, Inc. - Open Pit-Sand & Gravel 18,652

Black Hills Bentonite - Glenrock Mill 18,335

Alota Sand & Gravel, Inc. - Alpine Pit 18,333

Taylor Trucking 17,950

21

OPERATIONS MANHOURS

Reno Rock Transport LLC 17,828

Wyo-Ben, Inc. - Big Horn Basin Mines 17,398

JJC Fabrication 17,189

2M Construction, Inc. - Good Pit 16,640

Bentonite Performance Minerals, LLC - Lovell - BPM Lovell Mine 16,520

Evans Construction Company - Evans #1 Portable 16,200

Quality Agg & Construction, Inc. - 48-01729 QAC #2 15,658

IronArc Welding LLC 15,538

Viking Explosives & Supply, Inc. 15,504

Watco/Ciner Wyoming 15,456

LDE Corporation 15,073

JTL Group, Inc. dba Knife River - VR Pit 14,692

Industrial Services Inc 14,379

Wylie Construction, Inc - Wyle Pit 13,545

Winkler Trucking Inc. 13,520

Mountain Cement Company - Mountain Cement Open Pit 13,328

Black Hills Bentonite - Thornton Plant 11,998

Black Hills Bentonite - Tensleep Mine 11,778

Coleman Electrical Services, L.L.C. 11,190

Gorge Rock Products - Pleasant Pit 566 10,912

Simon Contractors - Willits Crusher #2 10,881

Intermountain Electric Service, Inc. 10,611

Earth Work Solutions Pilot Plant - Pilot Plant 48-01740 10,602

Specialized Blasting Services 10,405

New Era Petroleum, Inc. - West Warm Springs Project 10,400

TOTAL 107

22

COAL PRODUCTION FROM 1912 THROUGH 2016

Year Tonnage Employees

1912 .................................................................................................... 7,341,141 0

1913 .................................................................................................... 7,095,652 0

1914 .................................................................................................... 7,221,772 0

1915 .................................................................................................... 6,268,990 0

1916 .................................................................................................... 7,696,344 0

1917 .................................................................................................... 8,789,514 0

1918 .................................................................................................... 9,417,269 7,723

1919 .................................................................................................... 8,166,008 7,725

1920 .................................................................................................... 9,589,274 8,166

1921 .................................................................................................... 8,303,479 8,037

1922 .................................................................................................... 5,976,474 9,192

1923 .................................................................................................... 7,587,676 7,511

1924 .................................................................................................... 6,715,554 7,210

1925 .................................................................................................... 6,557,576 6,364

1926 .................................................................................................... 6,495,815 5,912

1927 .................................................................................................... 5,738,561 5,081

1928 .................................................................................................... 6,553,174 5,639

1929 .................................................................................................... 6,690,779 4,768

1930 .................................................................................................... 6,070,796 4,868

1931 .................................................................................................... 5,000,366 4,675

1932 .................................................................................................... 4,163,419 4,236

1933 .................................................................................................... 4,004,602 3,792

1934 .................................................................................................... 4,376,791 3,778

1935 .................................................................................................... 5,165,289 4,090

1936 .................................................................................................... 5,791,202 4,751

1937 .................................................................................................... 5,950,230 4,996

1938 .................................................................................................... 5,219,054 4,868

1939 .................................................................................................... 5,411,072 4,287

1940 .................................................................................................... 5,350,702 4,321

1941 .................................................................................................... 6,670,808 4,506

1942 .................................................................................................... 8,154,861 4,776

1943 .................................................................................................... 9,237,729 4,675

1944 .................................................................................................... 9,559,593 4,585

1945 .................................................................................................... 9,836,798 4,814

1946 .................................................................................................... 7,616,681 4,500

1947 .................................................................................................... 8,054,751 4,348

1948 .................................................................................................... 6,408,302 4,212

1949 .................................................................................................... 5,972,640 3,814

1950 .................................................................................................... 6,341,899 3,598

1951 .................................................................................................... 6,288,157 3,187

1952 .................................................................................................... 6,106,949 2,903

1953 .................................................................................................... 5,243,715 2,788

1954 .................................................................................................... 2,833,353 1,532

1955 .................................................................................................... 2,921,563 979

1956 .................................................................................................... 2,555,452 1,016

23

1957 .................................................................................................... 2,118,366 634

1958 .................................................................................................... 1,631,234 587

1959 .................................................................................................... 1,976,597 479

1960 .................................................................................................... 2,004,147 439

1961 .................................................................................................... 2,520,258 446

1962 .................................................................................................... 2,574,560 449

1963 .................................................................................................... 3,126,942 371

1964 .................................................................................................... 3,103,798 380

1965 .................................................................................................... 3,257,314 327

1966 .................................................................................................... 3,670,505 356

1967 .................................................................................................... 3,588,649 332

1968 .................................................................................................... 3,694,213 352

1969 .................................................................................................... 4,605,994 448

1970 .................................................................................................... 7,380,921 621

1971 .................................................................................................... 8,007,765 727

1972 .................................................................................................... 10,920,468 943

1973 .................................................................................................... 14,840,857 1,179

1974 .................................................................................................... 20,649,754 1,411

1975 .................................................................................................... 23,784,128 2,038

1976 .................................................................................................... 31,085,412 2,511

1977 .................................................................................................... 44,046,842 3,314

1978 .................................................................................................... 58,174,825 3,928

1979 .................................................................................................... 71,445,178 5,265

1980 .................................................................................................... 94,986,433 6,231

1981 .................................................................................................... 102,695,536 6,015

1982 .................................................................................................... 107,954,583 5,681

1983 .................................................................................................... 112,187,874 5,401

1984 .................................................................................................... 130,745,779 5,336

1985 .................................................................................................... 140,424,446 5,275

1986 .................................................................................................... 135,403,347 4,671

1987 .................................................................................................... 146,488,648 4,423

1988 .................................................................................................... 163,588,200 4,533

1989 .................................................................................................... 171,140,004 4,560

1990 .................................................................................................... 184,005,701 4,623

1991 .................................................................................................... 193,863,806 4,663

1992 .................................................................................................... 189,470,256 4,648

1993 .................................................................................................... 209,925,826 4,562

1994 .................................................................................................... 236,908,067 4,572

1995 .................................................................................................... 263,938,023 4,374

1996 .................................................................................................... 278,424,956 4,398

1997 .................................................................................................... 281,481,516 4,303

1998 .................................................................................................... 314,962,091 4,335

1999 .................................................................................................... 336,459,938 4,606

2000 .................................................................................................... 338,852,148 4,414

2001 .................................................................................................... 368,878,135 4,532

2002 .................................................................................................... 373,195,431 4,684

2003 .................................................................................................... 376,565,247 4,788

2004 .................................................................................................... 395,425,278 5,345

2005 .................................................................................................... 404,488,858 5,330

2006 .................................................................................................... 444,880,617 6,030

24

2007 .................................................................................................... 452,134,704 6,469

2008 .................................................................................................... 466,319,331 6,760

2009 .................................................................................................... 432,481,322 6,822

2010 .................................................................................................... 442,061,036 6,869

2011 .................................................................................................... 438,380,012 7,000

2012 .................................................................................................... 401,457,074 6,902

2013 .................................................................................................... 387,995,072 6,516

2014 .................................................................................................... 392,751,713 6,578

2015 .................................................................................................... 375,694,995 6,646

2016 .................................................................................................... 297,501,894 5,682

25

2016 - COAL PRODUCTION BY COUNTY

Campbell 287,243,453

Carbon 0

Lincoln 4,105,900

Sweetwater 6,152,541

TOTAL 297,501,894

2016 - COAL BY MINING METHOD

Surface 295,959,442

Underground 1,542,452

TOTAL 297,501,894

26

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