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I I I I I I I I I I I I I I I I I I I Memorandum to Mr. Ioannides April 28, 1986 Page 2 Difficult to scout from your boat or the bank due to the fact that the chutes are located away from the bank. The drops are too intimidating to a typical intermediate boater, due to the wave at the bottom of each drop and the turbulence in each pool. Rescue ca~i1ities. Difficult for rescue operations due to the location 0 the chutes from the river banks. 2. 3. Cost and Ease of Construction. Relatively low cost due to use of boulders and the design which fits into the configuration of the dam face. Major cost savings due to the fact the chutes were constructed as part of the rock check dams. 4. Appearance. "Wall" rocks along the edge of the chutes is unnatural appearing and the chutes are linear and uniform. 5. Operation and Maintenance. Debris tends to flow through the chutes, they should be better able to accommodate larger logs. 6. stability. Very stable, large stone grouted into place is solid. other Fish migration is easy due to the series of small drops and pools. No portage trails, landings or signage have been constructed. Large rounded grouted rock is good for the chute, but was not needed as high along the edge of the chutes. Use of deflectors would help. PUBLIC SERVICE DAM Diversion dam near the Englewood-Littleton sewage treatment plant. Physical Characteristics: approximately 3' drop Constructed of a concrete wall across the river with rock rubble (3' diameter) placed on the downstream face of the dam. A water intake structure is constructed on the left bank of the river, to divert water for the Public Service power plant. No man-made boat chutes have been constructed through the dam, but the water has naturally broached slots through the rubble dam along the left and right banks.