| Name | Kaycee Mine |
| Owner | Black Hills Bentonite Corp. |
| Operator | Black Hills Bentonite Corp. |
| Type | Surface |
| Product | Bentonite |
| Year |
Production |
Employees |
2010 |
506,034 |
13 |
2009 |
497,796 |
13 |
2008 |
600,000 |
15 |
2007 |
548,066 |
17 |
2006 |
491,188 |
16 |
2005 |
492,368 |
14 |
| 2004 |
458,770 |
12 |
| 2003 |
431,718 |
11 |
| 2002 |
338,507 |
12 |
| 2001 |
400,309 |
11 |
| 2000 |
312,482 |
9 |
| 1999 |
260,640 |
10 |
| 1998 |
324,948 |
14 |
| 1997 |
403,854 |
15 |
| 1996 |
331,228 |
13 |
| 1995 |
359,985 |
12 |
| 1994 |
335,243 |
10 |