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071?011990 10:33 FROM To <br />• <br />P.07 <br />!5f The Cedar Heights property owners should install a ~ulvett <br />in the location of proposed culvert "A" as shown in the <br />CAP. The size of this culvert will be dependent upon the degree <br />of street maintenance the property owners feel is acceptalole to <br />keep cedar Heights Drive free from sediment. At a mimimum, it is <br />recommended Chet the culvert be no smaller than a :24-inch <br />corrugated metal pipe. <br />!6f The operators of the quarry should provide the ownexa of the <br />Cedar Heights property with assurances that they will m~lintain <br />the safety berm and the area upstream o! the HR-6 outfall point <br />for sufficient period of time to allow for natural vegetation *,o <br />develop and therebylimit the amount o£ sediment available for <br />transport into the natural Swale through the Cedar F[eights <br />prep?rty. <br />(7- 5hou~'c~'optl;~orfs`'1"through 5 be Considered for implementation, <br />the quarry operator should be responsible for the stabil3.zation <br />o! the roadside awales and the safety berm to the satisfaction of <br />th• Cedar !!eights property owners. Since these opticns would <br />involve the diversion of flow Erom its historic path, it is <br />recommended that the Cedar Heights property owners not Flrovide <br />any hold harmless provisions to the quarry operator. The quarry <br />operator should be held responsible for the lor~q-term <br />maintenance o£ the facilities, and should be responsible 1`.or ,ny <br />damages resulting £rom runoff and erosion which might occur >n <br />the vicinity of the guard house and at the inlet and outlet of <br />the 54/30-inch culvert under Black Canyon Raad. <br />Kiowa will remain available to meet with the representatives of <br />the Cedar xeights property owners to discuss and clarity our <br />recommendations. Shouid you have any remaining concerns, please <br />do not hesitate to contact me. <br /> <br />5 <br />gincerely yours, <br />!(IOWA ENGYNEEERI*/wT,C CnRPORATIC~N <br />/- <br />Y ~~~~ <br />Richard N. Vrrray <br />Principal <br /> <br />.~ <br />