2008-09-29_PERMIT FILE - C1981019A ‎(19)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 9/29/2008
• Section_Exhibit Name: 4.20 Subsidence Control
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS
4.20 Subsidence Control
Colowyo is conducting a surface coal mining operation. Therefore, the requirements of 4.20 are not
applicable to the Colowyo operation.
Rule 4 Performance Standards 4.20-1 Revision Date: 6/23/08
Revision No.: MR-91