Laserfiche WebLink
<br />Jo- C, . <br /> <br />. <br /> <br />. <br /> <br />III-2l <br /> <br />Boat Chute Discharge Design Criteria <br />Based upon the hydrological evaluation of the South Platte River at <br />Columbine Valley, the flood characteristics of the river, water rights <br />demands, boating needs, the Chatfield Reservoir release patterns, and a <br />1500 cfs maximum target limit for recreational boating, we have determined <br />that: <br /> <br />1. The design objectives for the boat chutes at Columbine Valley will be <br />based on a range of discharges from 100 cfs to 1500 cfs for average recre- <br />ational boating use of the chutes; including rafts, canoes and kayaks. <br /> <br />2. A river discharge at Columbine Valley of from 50 to 100 cfs will be an <br />objective for use by recreational canoes and kayaks. <br /> <br />3. For expert whitewater boaters <br />extended from 1500 cfs to 3000 cfs. <br /> <br />" <br />/ <br />the river discharge objectives will be ) <br />\ <br />, <br /> <br />4. For the optimum boat chute design discharge objective the selected <br />discharge is 600 cfs. This is based on the average May - September period <br />(1972 - 1984) discharge at the Littleton Gage of 500 cfs, plus a 20 percent <br />allowance factor for the higher than average discharge. <br /> <br />5. An evaluation of future dry year hydrological projections indicate that <br />when flows fall below 50 cfs at Columbine Valley, it will be impractical <br />for boaters to use the river. In that event, the river would be impassible <br />to recreational boating. <br />