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<br /> <br />Peak discharges for these f loods ~re generally ~bout 40 percent to <br />60 percent of the Probable Maximum Floods for the same basIns. Such <br />floods, as used by the Corps of Engineers, lire Intended as practica- <br />ble expressions of the degree of protectIon that should be sought In <br />the design of flood control works, the failure of which might be <br />disastrous. <br /> <br />Top of Waterway <br />This Is the roof of the opening In a stream crossing through <br />which water flows under nor"", 1 condl'tlons. It Is the underside of <br />the deck span - sometimes cat led nlow stelll," the roof of a box <br />culvert or 'the crown of an arched or circular culvert. <br /> <br />12 <br /> <br /> <br />AUTHffilTY,ACKNOWLEDGEMENTSANOINTERffiETATIONOFOATA <br /> <br />This report has been prepared In accordance with the authority <br />granted by SectIon 206 of the Flood Control Act of 196C {PublJc L"", <br />86-645), as amended. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />The assistance and cooperation of the ColoradO Water Conservation <br />Board, the Urban Drainage lInd Flood Control Clstrlct, and local offi- <br />cials are appreciated. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />This report presents the flood situation along the downstream <br />reacheS of Bear Creek In 'the Denverrretropolltan area. TheO"",ha <br />District, Corps of Engineers wi II provide Interpretation and limited <br />technical assistance In application of data presented in the report. <br /> <br />" <br />