GENERAL51660

• Permit No: M1980244
• IBM Index Class Name: General Documents
• Doc Date: 9/9/1996
• Doc Name: CRESSON PROJECT PERMIT M-80-244 PROCEDURES AND MATERIALS FOR 1996 CONSTRUCTION DRAIN COVER FILL THI
• From: CRIPPLE CREEK & VICTOR GOLD MINING CO
• To: DNR
• Media Type: D
• Archive: No

• • iii iiiiiiiiiiiii iii
999
C C Cripple Creek & Victor Gold Mining Company
A Joint Venture -Pikes Peak Mining Company, Manager
~~ Operations Office Englewood Office
P.O. Box 191, 2755 State Highway 67 P.O. Box 5078, 5251 DTC Parkway, Suite 700
Vdor, CO 80860 Englewood, CO 80155
[phone] • FAX [phone] [phone] • FAX [phone]
September 5, 1996
HAND DELIVERED
Mr. Berhan Keffelew
Environmental Protection Specialist
Colorado Department of Natural Resources
Division of Mines and Geology
Office of Mined Land Reclamation
1313 Sherman Street, Room 215
Denver, Colorado 80203
ter;
~t r U u 1.99fi

Reference: Cresso^ Project: Permit M-80-244: Procedures and Materials For 1996
Construction. Drain Cover Fill Thickness on Roads Used By Contractor's Haul
Trucks.
Dear Mr. Keffelew:
While on site last week, Dr. Pendleton expressed a desire to review the degree to which a loaded
tractor trailer side dump truck might "rut" the roads that were the subject of the Cripple Creek
& Victor Gold Mining Company's ("CC&V") notification to you dated August 26, 1996.
CC&V requested that Golder Associates observe the travel of loaded trucks on a road
constructed of Low Volume Collection System Fill and that their observations be documented.
Photographs of the road surface taken afrer the first pass of a loaded side-dump unit on a fresh-
placed road base and the accompanying description are attached.
The road surface was run immediately after placement of the damp Fill. Compaction of the
surface was observed. The deepest indentation of a track below the original surface was 1.0
inch. It was observed that after a few passes of these trucks, further compaction is minimal.
This was confirmed during Dr. Pendleton's visit, when it was observed that once the road has
been travelled by the first few vehicles, no additional differential compaction (i.e. rutting) is
noticed.
CC&V's plan provided to you via our letter of August 26th was to run the tractor-trailer units
on 3.5 feet (42 inches) of Low Volume Solution Collection System Fill or Drain Cover Fill.
The principal of the 3.5 feet proposal was to maintain 3.5 feet on the roads at all times of use
by the loaded trucks. If the surface compaction resulting from truck traffic reduces the thickness
from 3.5 feet, additional material is to be added to the compacted track to maintain at least 3.5
feet.
In most cases, the section of the road subject to this compaction associated with the first travel
over the surface is located where material is being stockpiled for placement. The material is
dumped on the very same roadway. (Ofren the trailing wheels will run over the edge of the