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<br />.
<br />
<br />TO:
<br />
<br />HYDRO-TRIAD, LTO.
<br />M E M 0 RAN 0 U r~ ~,,;;l;-D'
<br />/ ~~\g;ilil~J.L~\\\\\,
<br />Bi 11 Stanton \i~~~" , ~ '91~~, '\
<br />Larry Lang 'Jp.."..., w"
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<br />
<br />Will i am B. Mathews . '. 't~,QLQ \:,,;,~ '~~F'<(it,()
<br />"''''',ll^1'\ON D
<br />December 18, 1978 ~~)"'~',.,
<br />11-22-78 Review Memo and Hydraulics Addendum
<br />Review Meeting of 12-14-78
<br />
<br />FROM:
<br />DATE:
<br />
<br />SUBJECT:
<br />
<br />Item numbers correspond to November 22, 1978 review memo from CIKB
<br />regarding Hydraul ics Technical Addendum. Items not enumerated wel"e
<br />resolved as set forth in the "Proposed Agenda Items, Coordination
<br />Meeting 12-14-78" tabulation.
<br />
<br />2) An album of photos used in support of the hydrology and
<br />hydraul ics aspects of the study will be submitted at the conclusion of
<br />the project.
<br />
<br />9,12,13,14,15) As discussed at the meeting regarding the urbiln
<br />drainage study, we have considered the avai'li'b'le alternatives in view
<br />of the purpose and scope of the drainage study, and decided upon the
<br />following as being the most useful, efficient, and relevant means of
<br />presenting the requested information. Mapp'ing separate from the strip
<br />mapping (for the drainageway floodplain boundal"y) will be presentE,d at
<br />a 1" + 400' scale (reduced scale orthophoto gr'id maps)" On this,
<br />mapping, the urbal1 area will be divided into contiguous drainage basins
<br />within the specified boundaries. Design points will be identified, as
<br />will the 16 probll~m areas. Accompanying this mapping 'Will be a tabula-
<br />t i on of each of the bas i ns, correspondi ng I c: I value (riot i ona 1 formul a
<br />coefficient of imperviousness), areas, basin time of concentration,
<br />rainfall intensit.'l, and resultant flow value, for both the initial 5
<br />year storm and the 100 year storm.
<br />
<br />I
<br />!
<br />
<br />Draft recomrnendat ions and revi ew criteT"i a for future development
<br />will be presented, as will acceptable depths, of flow for the initial
<br />and 100 year storm for the various road classifications. Road classi-
<br />fi cat ions wi 11 be shown on a map. Based on thi s data, at the respec-
<br />t'ive design points, acceptability of flow depth will be judged. In
<br />this manner, the basic hydrology at this stage of the analysis will be
<br />presented, and locations of drainage problems will be 'identified in
<br />
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<br />7!500 W. MISSISSIPPI AVE. ' SUITE 10
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<br />LAKEWOOD, COLORADO 80226
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<br />PHor~E 303,9342/117
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