PERMFILE51022

• Permit No: M1994027
• IBM Index Class Name: Permit File
• Doc Date: 8/15/1994
• Doc Name: FINAL ADEQUACY CONCERNS LONGMONT OPERATION DMG FN M-94-027
• From: CAMAS AMERICA INC
• To: DMG
• Media Type: D
• Archive: No

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~ CAMAS America, Inc.
Support Services Group-Denver Region
3609 South Wadsworth Boulevard Suite 300 Lakewood Colorado 80235
Telephone [phone] Facsimile [phone]
August 11, 1994
Mr. Berhan Keffelew
Environmental Protection Specialist
Division of Minerals and Geology
1313 Sherman Street, Room 215
Denver, CO 80203
RErEI~~~o
AUG 15 1994
e[VISt000ti1unein,~.. U,;O;UO~~
CAMAS
RE: Final Adequacy Concerns, Longmont Operation, DMG File No. M94-027
Dear Mr. I{effelew:
Per our phone discussions of August 9-10, 1994, I am responding to your verbal
request for clarification and/or commitment on two final adequacy concerns to our submitted
DMG application referenced above.
1. You have requested that I explain why a berrn should not be required along the
eastern edge of Boulder Creek which is the western edge of our mining boundary
along the length of our mining operation. 'There are several reasons:
a) Obviously the fast being, "What purpose would a berm serve?". Our gravel
plant location is on the highest ground available and there will be minimal
and heavy or well anchored equipment located within the pit. 'Therefore, any
flood waters from Boulder Creek entering our pit will do little damage to our
equipment and would cause no offsite impacts.
b.) Placing a substantial berm within the 100 year floodway or flood-prone area
may cause substantial offsite impacts, such as:
l.) forcing floodwaters west towards a nearby house causing increased
damage to their property,
2.) increasing flow velocity dovmstreatn by wnstrcting flow, due to the
berm, which could cause downstream erosion and increased
property damage to downstream residences,
3.) Causing the berm itself to erode increasing downstream sedimentation
and water quality problems.
c.) 'The Corps of Engineers, who have jurisdiction over Boulder Creek, may not
want a berm within the flood area of Boulder Creek ' =`- for the reasons stated
under b.).
d.) We have dedicated a 50 ft. riparian setback wne to maintain a corridor for
wildlife movement along Boulder Creek and to leave existing cottonwood trees
and willows. Placing a berm in this area would destroy this purpose.
t~ _ _
~ III IIIIIIIIIIIII III
999
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