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<br />Dr. John Liou/Larry Laag/Ken Brugh/Phillip Boawn <br />C:oss Sections for Oak Creek LMMP in F1orena:, 0 lorado <br />Page 2 <br /> <br />Also, upstream of the railroad, flow will split to 1 he west and spill over the railroad west of <br />Cyanide A venue. 111is flow is hydraulically disconm cted. from the main chaanel :and is outside the <br />city limits; thus, the resulting floodplain will not be c elin'~ated.. However, the amount of flow will <br />be' quaatified and the flow in the main channel reduce 1 by that amount. <br /> <br />Manning's Roughness value for the main channel is, stimated to be 0.040. The Roughness values <br />fer the overbank areas raage from 0.030 to 0.150. 1 'he 0.150 value is proposed to be used in the <br />UIbanized areas. <br /> <br />Please note that the mapping at the upstream end of lie !itudy is less thaa desirable. If aay better <br />mapping of the area exists, it would be advaatageou:i to have it made available for delineation of <br />the floodplain. <br /> <br />We would appreciate your responding to us by Apri 20, 1992 with your comments regarding the <br />oIientation and location of the cross sections. If 1lere are substaatial comme:nlts on the cross <br />sections, a meeting would be helpful so that aa agrel ment can be n:ached by all parties. Once aa <br />agreement has been reached, we will proceed WillI the hydraulic analysis. If you have any <br />questions, please do not hesitate to call. <br /> <br />Since:re y, <br /> <br />LO~ l ASSOCIAT{!IKC. <br />,,', ;/ ) <br />~~{t2/1 ~> zJ(' <br />David:. Love, p.m, <br />.--.--/ <br /> <br />DJL:jg <br />enclosures <br /> <br />cc: Phillip Boawn, U.S. Army Corps of Engineers, ~ Ibuqllerque <br />