2006 Bentonite Production and Employment

Company

Operation

Facility

Tons Milled

Tons Mined

Mill Employees

Mine Employees

American Colloid Co.

Colony-East

Mill

696,091

46

American Colloid Co.

Colony-West

Mill

587,557

74

American Colloid Co.

Colony

Mine

1,751,457

38

American Colloid Co.

Lovell Mill

Mill

660,000

106

American Colloid Co.

Lovell

Mine

853,225

10

BPM Minerals, LLC.

Colony

Mill

580,353

80

BPM Minerals, LLC.

Colony Area

Mine

757,309

16

BPM Minerals, LLC.

Lovell

Mill

661,311

65

BPM Minerals, LLC.

Lovell

Mine

830,884

7

Black Hills Bentonite Corp.

Worland

Mill

165,124

11

Black Hills Bentonite Corp.

Worland-Ten Sleep

Mine

202,972

7

Black Hills Bentonite Corp.

Kaycee

Mine

491,188

16

Black Hills Bentonite Corp.

Casper

Mill

186,109

16

Black Hills Bentonite Corp.

Thorsen

Mill

143,716

12

Black Hills Bentonite Corp.

Mills

Mill

129,667

30

Black Hills Bentonite Corp.

Thorten

Mill

61,981

4

Black Hills Bentonite Corp.

Oshoto

Mine

73,867

3

M-I, LLC.

Greybull

Mill

670,124

90

M-I, LLC.

Greybull

Mine

670,124

83

Kenneth E. Tanner

M-I Drilling Fluids Pit

Mine

27,000

6

Rock Springs Mineral Processing, Inc.

Mine

44,000

1

Wyo-Ben, Inc.

Sage Creek

Mill

140,770

29

Wyo-Ben, Inc.

Stucco

Mill

228,561

39

Wyo-Ben, Inc.

Stucco

Mine

400,192

9

Totals:

4,911,364

6,102,218

602

196