PERMFILE137248

• Permit No: M2005066
• IBM Index Class Name: Permit File
• Doc Date: 1/12/2006
• Doc Name: Hydrology Review
• From: DMG
• To: DMG
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
DATE: January 12, 2006
TO: Erica Crosby, Carl Mount
COLORADO
DIVISION O F
MIN SRALS
GEOLOGY
REC LAMATION•MINING
EAFETT•rCIENCE
Bill Owens
Governor
Russell George
/,/' ERecutive DIlQLTOf
FROM: Tom Schreiner /r~S Roruld W. Canany
~ I`I- Division Director
Natural Resource Trustee
RE: Hydrology Review, "Wallenberg West Sand & Gravel Mine'; Asphalt Paving Company
File M-2005-066, Class: Permit
This memo contains adequacy review comments from the Division's Hydrology Review of the
"Wattenberg West Sand & Gravel Mine" Regular 112 Application for 135 permitted acres and
reclamation to developed water resources, File No. M-2005-066.
6.4.3 EXHIBIT D -Mining Plan
1. The applicant specifies that the site will be de-watered and dry mined and that a CDPS permit
will be obtained from the Colorado Department of Public Health and Environment (CDPHE)
prior to discharge of groundwater. Rule 6.4.7(5) requires that the Applicant shall affirmatively
state that the Applicant has acquired (or has applied for) a National Pollutant Discharge
Elimination System (NPDES) permit from the Water Quality Control Division at the Colorado
Department of Health, if necessary. Based on the Division's review of the Applicant's mine and
reclamation plan it appears that an NPDES permit will be necessary, unless otherwise specified
by the CDPHE. Please demonstrate how the Applicant will comply with Rule 6.4.7(5).
2. The Applicant specifies in Exhibit M that a US Anny Corps of Engineers Nationwide Permit
will be obtained if required for construction of water conveyance and discharge structure(s) in
the Brighton Ditch or South Platte River. As shown on the Mine Plan Map, mine (process) water
will be discharged to the water conveyance easement (stnlcture) in the southeast corner of the
Phase 2 Area. In conformance with Rule 6.4.4, please clarify the expected rate of dischazge of
mine (process) water from the Wattenberg West Pit; and describe the nature of the existing
structure(s) to be discharged into. In the event there aze no existing conveyance and/or dischazge
structures at the point of discharge, please provide engineering designs and details for any water
conveyance or dischazge structure to be constructed; and revise the Mine Plan Map to show the
location of such conveyance or discharge structure. Please respond.
Office of Office of Colorado
Mined Land Reclamation Active and Inactive Mines Geological Survey