PERMFILE114609

• Permit No: M2005066
• IBM Index Class Name: Permit File
• Doc Date: 5/4/2006
• Doc Name: Hydrology Review
• From: DMG esc
• To: DMG
• Media Type: D
• Archive: No

eSCI C~ M
STATE
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
V~
V
DATE: May 4, 2006
OF COLORADO
COLORADO
DIVISION OF
MIN SRALS
GEOLOGY
0.ECLANATION•NINING
EAFETT•ECIEN CE
rem Owens
Governor
TO: Erica Crosby, Carl Mount RGEEeu George
Executive Director
FROM: Tom Schreiner RGrula w. catrany
Division Director
Naturzl Resource Trustee
RE: Hydrology Review, "Wallenberg West Sand & Gravel Mine'; Asphalt Paving Company
File M-2005-066, Class: Permit
U~
Per your request, I have reviewed the May 2, 2006 2"d adequacy response from Banks & Gesso,
LLC pertaining to the Wallenberg West Sand & Gravel Mine 112 Application. All hydrologic
concerns have been resolved to the Division's satisfaction based on the information and
commitments provided. Please note that on page 3 of the response letter, Asphalt Paving
Company has committed to submittal of a Technical Revision prior to any offsite discharge
(from pit dewatering activities) that will contain the details of the discharge structure(s) to be
used and associated erosion control methods that will be employed. Erosion control methods
will be deemed necessary by the Division if there is potential for excessive erosion of the
surrounding area based on the proposed discharge method(s).
Office of Office of Colorado
Mined Land Reclamation Active and Inactive Mines Geological Survey