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(5) The Cedar Heights property owners should install a culvert) <br />in the location of proposed culvert "A" as shown in the <br />CAP. The size of this r_ulvert will be dependent upon the degree) <br />of street maintenance the propert}• owners feel is acceptable to <br />keep Cedar Heights Drive free from sediment. At a mimimum, it is <br />recommended that the culvert be no smaller than a 24-inch <br />corrugated metal pipe. v <br />(6) The operators of the quarry should provide the owners of the <br />Cedar Heights property with assuran_r_es_ that they will maintain <br />the safety berm and the area upst~~am of the HR-6 outfall point <br />for sufficient period of time to allow for natural vegetation to <br />develop and therebylimit the amount of sediment available for <br />transport into the natural swale through the Cedar Heights <br />property. <br />(7) Should options 1 through 5 be considered for implementation, <br />the quarry operator should be responsible for the stabilization <br />of the roadside swales and the safety berm to the satisfaction of <br />the Cedar Heights property owners. Since these options would <br />involve the diversion of flow from its historic path, it is <br />recommended that the Cedar Heights property owners not provide <br />any hold harmless provisions to the quarry operator. Th~~ quarry <br />operator should be held responsible for the l.~ng-term <br />maintenance of the facilities, and should be responsible for any <br />damages resulting from runoff and erosion which might o~:cur in <br />the vicinity of the guard house and at the inlet and ou>;let of <br />the 54/30-inch culvert under Black Canyon Road. <br />Kiowa will remain available to meet with the representat:~ves of <br />the Cedar Heights property owners to discuss and clar_.fy our <br />recommendations. Should you have any remaining concerns: please <br />do not hesitate to contact me. <br />Sincerely yours, <br />KIOWA ENGINEEERING CORPORAT]'ON <br />Richard N. Wray <br />Principal <br />l '~ >~ C <br />~~L{ •~ <br />1~~~ . <br />5 <br />