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FLOOD06904
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Last modified
1/25/2010 7:10:17 PM
Creation date
10/5/2006 2:35:07 AM
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Template:
Floodplain Documents
County
Larimer
Basin
South Platte
Title
Hydrology, Geomorphology, and Dam-Break Modeling of the July 15, 1982 Lawn Lake Dam and Cascade Lake Dam Failures, Larimer County
Date
1/1/1986
Prepared For
Larimer County
Prepared By
USGS
Floodplain - Doc Type
Flood Documentation Report
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<br /> SUPPLEMENTAL CROSS-SECTION DATA 71 <br /> 9222 <br /> Left Bank Right bank <br /> 9220 n:;;;:O.125(?) I n~0.151?J I n = 0.09(7) 19218.5 <br /> n=O.lS(?) <br />::; 9218 372 <br />w <br />> <br />w 9216.4 <br />-' <br />'" 9216 363 <br />w ,S, 1982 <br />'" Water level Ju\ 9216.09 lHWM) <br />z 9213.5 348 <br />'" 9214 117 \9214_1 <br />w 9213.3 <br />::; 281 <br />w 246 <br />>- <br />'" \ 9210.9 <br />::; 9212.1 9211.0 1'35 9210.8 <br />X 17 9210.5 343 <br />0 9210 4'3 9209.6 245 <br />a: <br />.. EXPLANATION 1379209.91 <br />.. <br />~ 9208 154 <br />t;; . GROUND POINT 9211.6 <br />w 9212.1 ELEVATION 157 <br />~ 17 <br />;;:; 9206 STATION <br />;i n MANNING'S ROUGHNESS <br />0 COEFFICIENT <br />>= 9204 HWM HIGH WATER MARK <br />'" <br />> <br />~ ~ <br />w 9202 <br /> 343 <br /> 9200 Up to 6 to 8 feet diameter boulders deposited 86 bars , I Boulders 6 to 8 feet in diameter, <br /> debris and trees <br /> debris and trees <br /> <br /> <br /> <br />9198 <br />o <br /> <br />20 40 <br /> <br /> <br />60 <br /> <br />80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 410 <br />STATIONING. IN FEET <br /> <br />FIGURE 6O.-Roaring River cross section at river mile 8.83. <br />
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