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RESPONSE TO TECHNICAL INFORMATION AS REQUESTED 1) Stormwater Run-off Calculations--disturbed area watershed including SWMP acreage l0yr SCSII 24hr Peak Discharge Discharge Volume 27.56 cfs 4.52 acre ft 100yr SCSI124hr 77.56 cfs 12.26 acre ft Stormwater Run-off Calculation--Undisturbed upland watershed area 145 acres l0yr SCSII 24hr Peak Discharge Discharge Volume 66.64 cfs 10.95 acre ft 2. Average annual sediment loss from the disturbed area. 100yr SCSII 24hr 187.46 cfs 29.65 acre ft At the completion of sediment pond construction, seven collection basins will be in operation. The annual estimated sediment loss from the disturbed (mining zone) is 250 tons, most of which will be collected in the first #5 sediment pond in the SWMP area. Less than 5% of the annual loss from the disturbed area is estimated to be collected in #2, #3, and #4 sediment ponds. A zero release of sediments from the affected land boundaries is anticipated with this S'NMP. 3. Engineering Designs--Please find attached design drawings and construction detai Is of al I structures proposed in this SWMP. Plan views showing location and routing of all S\'VMP structures can be found on the "Stormwater Drainage Map" 1 ": 200' topographic included with this package. 5. Property owners that may be affected by the proposed stormwater management plan. T.H.E. anticipates no affect on neighboring land owners. Pueblo Community College and the City of Canon City have been notified and their response is forthcoming. 6. Tezak Heavy Equipment will design and build all proposed stormwater controls stch as channels, ponds, and spillways in such a way as to minimize impacts to the hydrologi ~ balance within the quarry as well as the surrounding area. Within the SWMP acreage, particular efforts will be made to preserve existing vegetation and minimize the disturbance. 7. Tezak Heavy Equipment Company, Inc., will contruct and have all structures operating effectively by October 31, 1996.