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.. M. <br />woodwarc�-C <br />"rapid drawdown"; however, this is not clear based on the surface features. We <br />recommend excavating 1 to 2 test pits through the cracki.ng to map the "direction" of the <br />slide surface. The test pits would be excavated about 5 to 7 feet deep and then re�Iled <br />with compacted material. <br />Scope Option 4- Snillwa�Conceptual Dgsign <br />We understand that the existing spillway is undersized when compazed with cuneat <br />spillway requirements. Our work scope for this item would consist of performing <br />hydrologic and hydraulic analyses for the Brush Hollow drainage area. Our hydrologic <br />analyses would include rainfall, runoff, �nd flood routing estimates for the required <br />design storm event. We would also perform hydraulic analyses of the existing spillway <br />and spillway enlargement altematives to � t ee conceptual designs and cost <br />estimates for enlargement of the spillw . ou also evaluate the quantities of <br />material that may be available fro y t�at could be used to repair <br />n��� � <br />the dam. , <br />Sco*� Ontion 5- Embanlanent Raise <br />We understand that sediment in the reservoir may have reduced the available storage <br />by 3 to 4 feet. You have requested that we include an estimate to evaluate increasing <br />the height of the dam by up to 4 feet to compensate for the lost storage. For this <br />option, we would develop a repair configuration for a raised embankment and estimate <br />the increased quantities and costs for the raise. <br />Scone Onti n 6 Ontlet Works In ecti n <br />We understand that the Water Company is consideri.ng a camera inspection of the outlet <br />works, since the reservoir is nearly dewatered. Our Scope of Work for Option 6 would <br />be to perform a video inspection of the outlet and document the inspectian on a video <br />tape. We would also complete a review of the condition of the outlet pipe and <br />document the results of our review in a letter report. The pipe condition review would <br />be completed by our outlet works specialist, Mr. Sal Todazo. In order to complete this <br />WoodwArd-Clyds COnsulta�s <br />23360/PR0.4 12-0&93(8:53ao�lRPT �i-5 <br />