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1 I 1 Council Meeting Minutes May 12,1992 Page 5 Public Hearina. continued Tom Weinberger "Big Bird", 260 Oakwood, has seen the catch basins overflow, and feels the runoff originates at Sky High. He continuously cleans out tne Sky High catch basin and is in favor of the grate modifications to the catch basin. George Zurbay, 1801..3rd St., asked if the condominium property runoff could be diverted to Silver Lane to release pressure off the low point. Proper said a portion of this parcel does drain to Silver Lane, and this was taken into consideration during the sizing of the storm sewer. Benke noted that the storm sewer grate cannot take the water fast enough to preclude backing up. If a neighborhood relies on the street itself to carry water to a bigger pipe, the area will be left without proper protection. The proposed system gets the water off the street and into the pipe at numerous points where drainage collects. Proper said in order to drain into the open area behind Oakwood's low point, a energy dissipation device is required because the open area is not a perfectly shaped basin and runoff would not drain well. Williams feels draining to the open area is just giving the water problem to someone else. City Manager Dave Childs noted a similar drainage problem on 7th St., east of Silver Lake Road, which was analyzed in 1976. At that time, Council chose a conservative approach to install a smaller portion of the sewer. Now, the present Council will discuss later tonight what actions will be needed to correct the flooding problems which were not remedied in 1976. John Angelucci, 301 Oakwood. said the two lots slope away from the curb and the builder should have corrected this or been denied a building permit, He feels the grates are filled with debris. . Benke said by the time water gets to the 3rd St. and Oakwood corner, the pipe is full and street flooding occurs. The basic issue is water flowing from the top of the hill needs to be corrected, and building up the lots would create street flooding, Bob Simmer, 1831 Sky High, said cottonwood trees plug the Sky High catch basin and redesigning it may help, but the berm would be ineffective. He suggested an easement be used between the two low lots to install a ditch system to drain the runoff into the open area behind the lots. Mr. Lloyd said the problem is the clogged drains. Benke said the problem would still occur if the drains were cleaned because the pipe does not have enough capacity and the system overflows, Williams asked if neighbors would assist to keep' the new Sky High and Oakwood grates free of debris. Proper said the proposed Sky High basin would reduce future clogging. Joe Klucas, 381 Oakwood, said the system floods many times a year, and opening the grate will not help if the pipe is inadequate. Installing another catch basin on Oakwood and grading the open area may help, but a drainage ditch is unfeasible. He asked if the project could be split into two phases to cut costs. Benke said splitting the project into two phases will not reduce the cost in half. Public Hearing Storm Sewer Improvement Oakwood Drive/Silver Lane IP-92-2 Report 92-108