INSPEC15743

• Permit No: M1985043
• IBM Index Class Name: Inspection
• Doc Date: 9/5/2002
• Doc Name: Corrective Action Submittal
• From: DMG
• To: Red Canyon LLC
• Inspection Date: 6/20/2002
• 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]
September 5, 2002
Mr. Robert Stack
Red Canyon LLC
3131 Barrett Road
Colorado Springs, CO. 80926
Re: Corrective Action Submittal, Red Canyon Quazry, M-1985-043
Deaz Mr. Stack:
D (VISION OF
MINERALS
GEOLOGY
RECLAMATION
MINING•SAFETY
Bill Owens
Governor
Greg E. Walther
Executive Director
Ronald W. Cottony
Acing Division Director
On June 20, 2002, the Division completed a partial inspection of your quarry operation.
Specifically, the retention/sedimentation ponds were reviewed to ensure they were still capable
of containing the 2 year 24 hour precipitation event, as approved in the latest amendment.
As noted in the inspection report, pond #1 was deemed adequate. Pond #2 was recently moved to
the north (since the highwall moved north) and re-excavated. The dimensions and containment
capcity were unknown so it was noted as a problem in the inspection report. You were required
to submit a new mining plan map showing the new location of the pond. Also, you were required
to provide the dimensions of the new pond so its capacity could be calculated.
In addition, since pond #3 has been totally eliminated, you were required to submit a technical
revision to receive approval for the elimination of the pond (along with all the technical data
necessary to demonstrate that the pond is not needed). Or, if the pond is to be moved to another
location, you were required to submit a revised mining plan map showing the new location and
the revised dimensions.
The Division received your corrective action submittal which is comprised of a cover letter from
Rocky Mountain Premix (Tom Smith) and an updated mining plan map showing the location of
the sedimenta[ion/retention ponds and the dimensions of the ponds. The Division's capacity
calculations differ slightly from yours. However, in the final analysis, the bottom three ponds
should be capable of containing the storm flow from the 10-year 24 hour precipitation event
exiting the 55 acre watershed area.
Pond #1 should be capable of containing 2.26 ac-ft of flow. Pond #2 has a calculated retention
capacity of 4.90 ac-ft. And pond #3 should be able to contain .61 ac-ft. Total retention capacity
for the three ponds is calculated at 7.77 ac-ft (the 10-year event is estimated at 5.6 ac-ft).
The corrective action requirement has been abated.