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• ~ • PHONE NO. : 3033254600 • Oct. 25 1997 09:15PM P3 FROM MONADN::_K RE: MEMPHIS, FSLE N0. M-97-084 Page 4 additional hazards will be created by removal of the was[e 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 ouray 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 ~:n the existing material at the current angle of repose, and not regtiire additional disturbance or excavation to create slopes, other t1.an the existing angle of repose, on remaining in-place materia: . Exhibit H - Municipalities Within a Two-mile Radius The; City of Ouray contact is Lee Merkel, City Administrator, P,O. Hcx 468, 320 6th Avenue, Ouray, Colorado 81427. Phon~9 (970) 325-7211. gxhibit .t - Permanent Man-made Structures The man-made structures in Rotary Park are on the revised Exhibit E. These structures will not be affected. The pow=r poles will be avoided by access, screening and stockpiling. The Lence along t:'= south of the permit area, shown on $xhibit E, will be replace:, if necessary. Rule 6.lS - Geotechnical Stability Exhibit Thu 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 Co determin= 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 from Rotary Pa~_k on the Nox•t:h and Daisy Placer on the South are nearly vertical. 4. The slope of the bedrock under the material to be rertwved is relatively uniform and of the 45-50 degrees as cal~:ulated in assumption #1 above. Th¢ three scenarios shown on the "Longitudinal Sections of Intermiltant Drainage" diagram the three possible slope conditions. SCENARIO #1: Thi6 shows the assumed slope of the bedrock in the drainage to be -50 degrees. This orould place trie bottom of the drainage at the cliff face at the proposed cliff base. Thi.? is possible with the calculated bedrock slopes of 45-50 degrees.