PERMFILE108463

• Permit No: C1981020A
• IBM Index Class Name: Permit File
• Doc Date: 5/13/2002
• Section_Exhibit Name: APPENDIX E
• Media Type: D
• Archive: Yes

• APPLICATION FOR REPAIR OF FLOOD DAMAGE
GP 053
A. Applicant Grand Valley Coal Company
P. 0. Box 70
Loma, Colorado 81521
(970) 858 - 3608
Owner U S Bureau of Land Management
2815 H Road
Grand Junction, CO 81506
(970) 244 • 3000
B. Purpose & Need
Grand Valley Coal Company operates a coal mine in Munger Canyon, an
ephemeral tributary to East Salt Creek. The mine road crosses natural channels
along its route from Highway 139 to the mine site. Figure 1 shows the location of
the project. All of the channels are ephemeral and flow only in direct response to
precipitation. One of the channels tributary to Munger Creek has experienced flood
• damage from a storm on August 5, 1997. The location of the channel is the NW'/a
of the SW 1/a of Section 28 in Township 7S Range 102 W of the 6TH PM in Garfield
County, Colorado. The damage was the result of an intense thunderstorm which put
down two inches of rain in about 5 hours. The channel was approximately six feet
deep and three to five feet wide. As a result of the storm, the entire creek channel
for a length of 320 feet was filled with debris. Figure 2 shows the location of the
damage of which occurred. Figure 3 shows a cross section and a photograph of the
damage. The debris in the channel has caused the stream to leave the channel and
flow overland in what approximates a braided stream channel on a delta. These
numerous small channels have disrupted the surface water system along the mine
road. Water now flows across the road at numerous locations and does not reach
the 42 inch culvert designed to convey the flows from the original channel under the
road.
Repair of the channel will entail excavation of the debris to the approximate
original configuration. The material will be excavated with a front end loader or back
hoe and loaded in a truck. The truck will transport the material approximately 300
yards to the west for storage in a stockpile area. The excavation will start about 320
feet upstream of the road. The channel will be excavated three to five feet deep with
a five foot wide channel bottom. The side slopes of the channel will be 1 to 1,
horizontal to vertical. A total of about 400 cubic yards of material will be
• excavated. If possible, the large boulders contained within the debris will be
segregated and stored in a "rip rap" stockpile near the topsoil stockpile. The
location of the disposal sites are shown on Figure 4.

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