2012-10-01_REVISION - M1977305 ‎(15)‎

• Permit No: M1977305
• IBM Index Class Name: REVISION
• Doc Date: 10/1/2012
• Doc Name: EPP Submittal- Part 3, Drainage Design Plan to Maps.
• From: Cotter Corp.
• To: DRMS
• Type & Sequence: AM1
• Media Type: D
• Archive: No

CERTIFICATION
I hereby certify that this Drainage Design Plan for the design of the Cotter LP -21 Mine, was
prepared by me (or under my direct supervision) in accordance with criteria required by the
Colorado Division of Reclamation Mining and Safety (DRMS).
Patrick M. O'Connor, P.E.
Registered Professional Engineer
State of Colorado, #20759