2010-09-15_ENFORCEMENT - C1981019

• Permit No: C1981019
• IBM Index Class Name: ENFORCEMENT
• Doc Date: 9/15/2010
• Doc Name: Requesting Assistance ‎(Memo)‎
• From: Jim Stark
• To: Dan Hernandez
• Violation No.: CV2010004
• Email Name: JRS
• Email Name: SB1
• Email Name: DIH
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF RECLAMATION, MINING AND SAFETY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
COLORADO
D I V I S ION OF
RECLAMATION
MINING
SAFETY
Bill Ritter, Jr.
INTEROFFICE
Governor
MEMORANDUM Mike King
Executive Director

TO: Dan Hernandez Loretta E. Pineda
Director
FROM: Jim Stark
SUBJECT: Colowyo CV-2010-004 Penalty Assessment
DATE: 15 September 2010
I am requesting your assistance in assessing a penalty for Notice of Violation CV-2010-
004 at the Colowyo Mine. The violation was issued on 23 August 2010 (received by
Colowyo on 25 August 2010) for numerous violations related to improper ditch
construction and failure to maintain a sediment pond, based on the Division's 18 August
2010 inspection. The NOV file folder, a copy of the inspection report and a copy of
Colowyo's response and additional information is attached. There are also additional
photos located at M:\coahjrs\August 2010 photos.
The violation was written for the following: Failure to construct permanent post-mining
drainage channels in accordance with the approved reclamation plan. Failure to construct
permanent, post-mining drainage channels to safely pass the peak runoff from a 100-year,
24-hour storm event. Failure to construct permanent, post-mining drainage channels to
prevent additional contribution of suspended solids to runoff. Failure to properly
construct and maintain sediment ponds.
This violation applies to four areas: the lower 1,200 feet (approximately) of the North
Tributary, East Pit Ditch; the lower 1,100 feet (approximately) of the Final East Pit Ditch;
the lower 1,500 feet (approximately) of the Taylor Tributary Ditch and; the West Taylor
Pond.
The steps for abatement, which are currently being worked on by Colowyo are:
1. Repair and construct noted ditch segments as designed and approved, ensuring that
sideslope drainage can freely enter the ditches, that ditches are constructed and located in
their approved locations, that bottom width, sideslope and freeboard are constructed as
designed and that riprap sizing is as approved in the design.
Office of Office of
Mined Land Reclamation Denver 9 Grand Junction • Durango Active and Inactive Mines