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<br /> <br />6 <br /> <br />be free of attack. <br /> <br />Greg Moore of the local USACE office indicated that 3-feet deep scour holes were <br />forming at Brown Ditch about 150 to 200 feet downstream of the boatchutes. These <br />holes have caused undercutting of the river bank. Both he and Ben Urbonas recom- <br />mended moving the boatchute about 20-feet away from the west bank and angling the <br />boatchute slightly towards the middle of the river. <br /> <br />Cliff Pugh of the USBR said that, with the additional funds recently approved for the <br />model study, he would modify the existing model to include the following changes: <br />1. Add the wedge material to the model. <br />2. Move the location of the boatchute at the downstream embankment crest. <br />3. Use the same configuration for this boatchute as that at the existing USACE <br />dam crest. <br /> <br />The group decided that, because of the decrease in wall height in the exit channel <br />downstream of the radial gate, a chain link fence or other means might be consi- <br />dered to keep boaters out of this channel. <br /> <br />Bill McCormick of the city of Englewood described present operation and mainte- <br />nance of their intake. He uses the low submerged wall in the intake channel to stand <br />on while he sluices sand and moss from the intake with a high pressure hose. Once <br />a week he opens the radial gate for about 20 to 30 minutes to sluice the sand in the <br />intake channel. <br /> <br />When the flow in the river is high, from 300 cfs to 500 cfs, he opens the radial gate <br />to the fully opened position. However, even with the radial gate fully opened, when <br />there is 1,500 cfs in the river, the upper two of the five intakes are clogged with <br />sand and he needs to sluice them out. He has problems with sand, algae, and moss <br />and problems with ice during the winter. <br /> <br />He also asked if the flow depths in the river w1l1 be higher; will he need to add addi- <br />