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FLOOD09874
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Last modified
1/26/2010 10:10:55 AM
Creation date
10/5/2006 4:42:54 AM
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Template:
Floodplain Documents
County
Statewide
Community
State of Colorado
Basin
Statewide
Title
Use of Riprap for Bank Protection
Date
6/1/1967
Prepared By
USDOT
Floodplain - Doc Type
Project
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<br />Ex8lllP1e 1 <br /> <br />. <br /> <br />Material <br /> <br />Particle Size <br /> <br />l>J.5 <br /> <br />Riprap <br />Streambank <br />Sand <br />Gravel <br /> <br />90 DIll <br />0.006 ... <br />0.14 II1II <br />4.0 ... <br /> <br />Is tllter required? <br /> <br />. <br /> <br />. <br /> <br />l>J.5 (riprap) 90 <br />Da5 (streambank) ~ 0.10 ~ 900) 5 <br /> <br />Can a single layer of gravel be used? <br /> <br />>>85 <br /> <br />308 IIDI <br />0.10 DIll <br />2.4 DIll <br />50 DIll <br /> <br />l>J.5 (riprap) 90 < <br />~ -- ~ 1.8 5 <br />D85 (gravel) 50 <br /> <br />l>J.5 (gravel) _ 4.0 _ <br />D85 (streambank) - 0.10 - 40> 5 <br /> <br />Can a layer of sand and a layer of gravel be used? <br /> <br />1st requirement <br /> <br />. <br /> <br />~. <br />I <br />I · <br />I <br /> <br />D15 (riprap) 90 <br />D85 (gravel) ~ 50 ~ 1.8 < 5 <br /> <br />D15 (gravel) 4.0 <br />= - = 1.7 < 5 <br />D85 (sand) 2.4 <br /> <br />D1.5 (sand) = 0.14 = 1.4 < 5 <br />D85 (streambank) 0.10 <br /> <br />2nd requirement <br /> <br />. <br /> <br />DJ.5 (riprap) 90 <br />D15 (gravel) = '4.0 = 22 < 40 <br /> <br />l>J.5 (gravel) _ 4.0 _ < <br />~5 (sand) - 0.14 - 29 40 <br /> <br />D15 (sand) 0.14 <br />- = O."M ~ 23 < 40 <br />~5 (streambank) wo <br /> <br />. <br /> <br />11-17 <br /> <br />Yes. <br /> <br />Ok. <br /> <br />No. <br /> <br />Ok. <br /> <br />Ok. <br /> <br />Ok. <br /> <br />Ok. <br /> <br />Ok. <br /> <br />Ok. <br />
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