Laserfiche WebLink
<br />1 <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />HYDROLOGY <br /> <br />I1-23 <br /> <br />RIVER DISCHARGE DESIGN CRITERIA <br />Based upon the hydrological evaluation of the South Platte River at Union <br />Avenue, the flood characteristics of the river, water rights demands, <br />boating needs, the Chatfield Reservoir release patterns, and a 1500 cfs <br />maximum target limit for recreational boating, we have determined that: <br /> <br />1. The design objectives for the boat chute at Union Avenue will be <br />based on a range of river discharges from 150 cfs to 1500 cfs for <br />average skilled recreational boating use of the chutes; including <br />rafts, canoes and kayaks. <br /> <br />2. The City of Englewood diverts municipal water at the right <br />abutment of the Union Avenue Dam. Englewood prefers to use the <br />first 100 cfs of flow in the river to satisfy their water <br />diversion and to minimize sand build-up and plugging of their <br />intake screens. The Englewood water right must be satisfied prior <br />to diverting water through the Union Avenue boating by-pass. <br /> <br />3. A river discharge of from 1500 cfs to 3000 cfs is suitable only <br />for expert whitewater boaters, and such boaters use the river and <br />boat chute with full knowledge of the risk to their safety. <br /> <br />4. An optimum river discharge is 300 to 1000 cfs. <br /> <br />5. An evaluation of future dry year hydrological projections indicate <br />that when flows fall below 50 cfs at Union Avenue, it will <br />generally be impractical for boaters to use the river. In that <br />event, the river would be impassable to all recreational boating. <br />Boaters would not be on the river at flows less than 50 cfs at the <br />Littleton gage. <br /> <br />