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HYDRO20313
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HYDRO20313
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Last modified
8/24/2016 8:41:40 PM
Creation date
11/20/2007 1:27:49 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981071
IBM Index Class Name
Hydrology
Doc Name
COLO YAMPA COAL CO CERTIFICATION OF POND DESIGN & CONSTRUCTION
Permit Index Doc Type
PROF POND CERTIFICATIONS
Media Type
D
Archive
No
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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br /> <br />SEDIMENTATION POND F - As Built Specifications <br />- Sedimentation pond designed for 10-year, 24-hour event. <br />- Emergency spillway designed for 25-year, 24-hour event. <br />- Antecedent moisture condition II <br />- Weighted curve number - 71 <br />- Sediment volume - 1.03 Ac-Ft. <br />- Runoff volume - 1.21 Ac-Ft. <br />- Total volume - 2.24 Ac-Ft. <br />- Emergency spillway height above bottom of natural channel is less than <br />ten feet. <br />- Relative elevation top of dam - 101.3 <br />- Relative elevation top of decant - 99.5 <br />- Relative elevation crest of spillway - 100.0 <br />- Depth of flow in spillway for 25-year, 24-hour event - 0.2 Ft. <br />- Relative elevation dewatering hole - 98.0 <br />- Diameter of dewatering hole - 2 inches <br />- Detention time - 34.9 hours <br />
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