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-OCI Cy "J( 1157011 DM~RAIVGO FIELD OFFICE ~ P.Si10 "' -~. RE: hcHPHIS~ FILE Ncrt1-97-084 Page 4 additional hazar• will be created by remov~of the waste rock-alluvium. Mature woody vegetation will be removed from the material to be excavated, on an ongoing basis as the project progresses. Trees will be removed, cut into firewood and hauled from the site. Stumps will be removed and made available to the City of Ouray, or others, to be used as "tree-wads" for stabilization in river projects. Any "slash" remaining from these activities will be piled and burned using an appropriate City of Oaray burning permit. Reclamation of a partially-mined site would be simple as the site is currently stable and has been so for many years. None of the proposed work will affect this situation. In fact, the stability of the material in the drainage will be complete as the project progresses therefore leaving no highwall to be reclaimed if partial mining occurs. It is proposed that the State leave the existing slopes on the existing material at the current angle of repose, and not require additional disturbance or excavation to create slopes, ~ other than the existing angle of repose, on remaining in-place material. Exhibit H - Municipalities Within a Two-mile Radius The City of Ouray contact is Lee Merkel, City Administrator, P.O, Box 463, 320 6th Avenue, Ouray, Colorado 61427. Phone (970) 325-7211. Exhibit L - Permanent Man-made Structures The man-made structures in Rotary Park are on the revised Exhibit~E. These structures will not be affected. The power poles will be avoided by access, screening and stockpiling. The fence along the south of the permit area, shown on Exhibit E, will be replaced, if necessary. Rule 6.5 - Geotechnical Stability Exhibit The attached "Longitudinal Sections of Intermittant Drainage to the east of the proposed excavation, outline three possible configurations of the drainage area. Since it is not possible to determine the configuration of the bottom of the drainage until after ~ material has been removed, the following has been assumed: 1. The average slope for the bedrock in the entire drainage has been calculated to be 45-50 degrees. 2. The average slope of the cliffs throughout the entire drainage has been calculated to be 60-65 degrees. 3. The cliff faces above the flat fzom Rotary Park on the North and Daisy Placer on the South are nearly vertical. 4. The slope of the bedrock under the material to be removed is relatively uniforn and of the 45-50 degrees as calculated in assumption #1 above. The three scenarios shown on the "Longitudinal Sections of Intermittant Drainage" diagram the three possible slope conditions. SCENARIO #1: This shows the assumed slope of the bedrock in the drainage to be "50 degrees. This would place the bottom of the drainage at the cliff face at the proposed cliff base. This is possible with the calculated bedrock slopes of 45-50 degrees.