GENERAL56002

• Permit No: M1980244
• IBM Index Class Name: General Documents
• Doc Date: 9/11/1996
• Doc Name: PROCEDURES AND MATERIALS FOR 1996 CONSTRUCTION DRAIN COVER THICKNESS ON ROADS USED BY CONTRACTORS HA
• From: DNR
• To: BERHAN KEFFELEW
• Media Type: D
• Archive: No

• • iiiiiiiiiiiiiiuiii
999
STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
DePatlmenl al Nd1Um Re50UrCe5
1313 Sherman SL. Room 215 Jly~~
Den•~er, Colurado 80203 I I
Phone: [phone]
FAY: 1103) 832 8106
DATE: September 1 1 , 1 996 DEPARTMENT OF
NATURAL
RESOURCES
T0: Berhan Keffelew `~ Roy ROmer
Governor
lames 5. Lochhead
Execwrce Director
FROM: Jim Pendleton - -~,.~ MichaelB Long
Division Director
RE: "Procedures nd riots for 1996
Construction. Drain Cover Thickness on Roads
Used By Contractor's Haul Trucks"
(Permit No: M-80-244)
I have reviewed the revision application submitted by Cripple Creek &
Victor Gold on August 26, 1996. After receipt of this request to reduce
the thickness of the roads used by the Contractors haul trucks I visited
the site on Friday, August 30, 1996. During this visit I discussed my
concerns with John Hardaway. I toured the areas receiving the drain cover
.fill, Phase II, and the drain cover fill stockpile area. I expressed a
concern regarding rutting by the haul trucks to John. CC&VG has
subsequently submitted photographs of rutting, which they estimate at a
maximum of 1 inch. I have reviewed this submittal of September 5, 1996.
Allen Sorenson also reviewed the CC&VG submittal at your request. In his
memo of September 3, 1996, AI recommends that we require CC&VG to
analyze the dynamic or shear load implications of thinning the required
haul road thickness.
In March of 1996, CC&VG submitted an analogous application for thinning
the drain cover fill section of Phase II. As a portion of this application
Golder Associates completed a thorough dynamic and static analysis of
geomembrane loading due to equipment movements during material
placement. The concern focused on possibly disruptive quick pivot turns,
abrupt braking, or overloaded attempts to push material. During the