2003 Bentonite Production and Employment

Company

Facility

Plant Production

Mine Production

Plant Employment

Mine Employment

Tons

Tons

American Colloid Co.

Colony-East Mill

566,993

42

American Colloid Co.

Colony-West Mill

405,102

67

American Colloid Co.

Colony Mine

521,593

38

American Colloid Co.

Lovell Mill

481,173

65

American Colloid Co.

Lovell Mine

355,453

24

American Colloid Co.

Upton Mill & Mine

Closed

BPM Minerals, LLC.

Colony Mill

477,103

61

BPM Minerals, LLC.

Colony Area Mine

470,231

15

BPM Minerals, LLC.

Lovell Mill

569,351

69

BPM Minerals, LLC.

Lovell Mine

709,507

7

Black Hills Bentonite Corp.

Worland Mill

129,487

12

Black Hills Bentonite Corp.

Worland Mine

134,344

5

Black Hills Bentonite Corp.

Kaycee Mine

431,718

11

Black Hills Bentonite Corp.

Casper Mill

181,266

17

Black Hills Bentonite Corp.

Thorsen Mill

156,542

12

Black Hills Bentonite Corp.

Mills Mill

64,613

22

Black Hills Bentonite Corp.

Thorten Mill

23,288

2

Black Hills Bentonite Corp.

Oshoto Mine

29,816

3

CETCO

Lovell Mill

37,500

24

M-1, LLC.

Greybull Mill

469,685

66

M-1, LLC.

Greybull Mine

623,108

58

Kenneth E. Tanner

M-1 Drilling Fluids Pit Mine

34,500

4

Wyo-Ben, Inc.

Sage Creek Mill

164,206

21

Wyo-Ben, Inc.

Stucco Mill

192,378

39

Wyo-Ben, Inc.

Stucco Mine

450,535

8

Totals

3,918,687

3,760,805

519

173