_INSPECTION - C2010089 (10) - Laserfiche WebLink

Home Browse Search

December 12,2012 C-2010-089/New Horizon North Mine MLT FISH and WILDLIFE—Rule 4.18: • A pair of bald eagles was sighted in the area. They were initially perched in the cottonwood trees next to the former alignment of the CCC West Lateral Ditch, where it crosses the Garvey property. The eagles flew off as we approached the area. • Deer and elk prints were observed within the disturbed area. • Mr. Ragsdale said he had seen a badger recently near culvert C-I on the permit's eastern boundary. HYDROLOGIC BALANCE - Rule 4.05 Drainage Control 4.05.1, 4.05.2, 4.05.3; Siltation Structures 4.05.5, 4.05.6; Discharge Structures 4.05.7, 4.05.10; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring 4.05.13; Drainage—Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: • Construction of Pond NHN-001 has been completed, together with the ditches (Photos 1 and 2) that flow into the pond from the east (NHN-001 East) and west (NHN-001 West). The as- built certification for the pond was submitted with the application for MR-02 and is being reviewed by the Division. • The approved design for Pond NHN-001 is found in the permit as Appendix 2.05.3(4)-1 and illustrated on Map 2.05.3(4)-I Surface Hydrology. A number of field modifications were made to the design. • Excavation of the western end of the pond was shallower than anticipated, due to the presence of a resistant sandstone ledge that would have required blasting (Photo 3). • The primary spillway, which consists of a riser with two 6" gated valves (Photo 4), was shifted westward to line up with the in-place 24" culvert passing beneath AA Road. • The emergency spillway was also shifted to allow flow to access another 24" culvert beneath AA Road, and a cylindrical concrete drop structure was installed to direct flow from the open channel into the exposed culvert end, below (Photos 5 and 6). • Ditches were revised significantly from the original design; A V-bottom shape replaces the original flat-bottom cross section, and reaches steeper that 2%have been lined with crushed rock, which is underlain by a layer of geotextile held in place by a geotextile of cellular form (Photos 7 and 8). OTHER(SPECIFY): • As a condition of the Special Use Permit from Montrose County, Western Fuels was required to upgrade the 2700 Road bridge across Tuttle Draw. County forces participated in the project, and installation of the new structure is now complete. The structure consists of prefabricated concrete sections, with upstream and downstream concrete wingwalls (Photo 9). The channel upstream, downstream and beneath the structure has been lined with large sandstone riprap. Traffic has been restored to the original alignment, but the driving surface has not yet been paved with asphalt. Permanent guard rail has not yet been installed,but temporary concrete barriers have been placed along the edge, for safety. The detour route is still in place and has not been removed. Number of Partial Inspection this Fiscal Year: 6 Number of Complete Inspections this Fiscal Year: 2 Page 3 of 12