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Mr. Harold E. Clare II - 3 - June 6, 1989 provided in the narrative. Please address the following questions: a. What is the peak flow resulting from the 100-year, 24-hour storm event in Twin Creek at the location of the dam? b. When the emergency spillway is flowing at this rate, how much vertical distance between the too of the water in the spillway and the top of the dam will there be? c. What size of riprap (average diameter) will be used in the spillway construction? Exhibit E - Reclamation Plan 6. Ttie seed mixture proposed is the same as suggested by "Hydro-Turf." The Soil Conservation Service in their evaluation and letter dated August 1588, proposes a similar but different seed mixture. After reviewing both, the Division recommends you follow the recommendation provided by the SCS. The SCS mix is more adapted to the elevation of your site and can easily be prepared by any seed store at the same or similar cost. Please commit to the seed mixture recommended by the SCS, or provide documentation that the seed mix you have selected is more likely to achieve successful reclamation. 7. The SCS has also made recommendations on fertilizer requirement - 40 lbs phosphorous and 40 lbs nitrogen per acre - and mulching at two (2) tons per acre. Please commit to these recommendations and mowing for weed control. 8. No estimate of reclamation costs were provided in the application as required. Based on 4.5 acres of disturbance requiring revegetation, the Division has calculated the following estimate: Purchase topsoil - 400 yds @ $3.10/yd = $1240 Spread topsoil - 400 yds @ E1 .00/yd = 400 Seeding - 4.5 acs @ $150/ac = 675 Fertilizing - 4.5 acs @ $ 90/ac = 405 Mulching - 4.5 acs @ $225/ac = 1013 Riprap - 130 yds @ $ 15/yd = 1950 Subtotal $ 5683 Administrative @ 15~ 852 Total $ 6535 As the maximum bond for a limited impact (110) permit is defined by regulation at $5000, the Division wil recommend $5000 be set as the bond amount required for this operation.