CC PACKET 10131987 - Laserfiche WebLink

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• -2- The City retained Short-Elliott-Hendrickson to investigate the extent of damage done to the spillway following the July 1987 storm. The report, attached, appears to indicate that the spillway, which was engineered and developed by Comstock & Davis in the 1960 ' s, was not constructed nor designed properly and its collapse was in- evitable. Short-Elliott-Hendrickson has suggested three ways to correct the problem: 1. to totally reconstruct the unit for approximately $36 ,000 ; 2 . to temporarily repair the unit for about $14 ,000; or 3 . to stabilize the washouts with a sizeable amount of rock to hold the washing out until the unit can be financed. This work would be done by the Public Works Department - the only cost would be for materials. Recommendation I recommend a portion of the storm sewer users fee be used to - temporarily stabilize the spillway and develop plans and specifica- tions for the reconstruction of the 'structure. I believe the structure can be secured for another year which would give the City time to finance total reconstruction. SANITARY SEWER FEASIBILITY STUDY Two quotations have been received for a relief sanitary sewer feasibility study (attached) . 1. Rieke Carroll Muller quoted a cost not to exceed $6 ,700 . 00. They would study the hydrology of the sanitary sewers and devise a method to assist in backing up the main lines. Rieke Carroll Muller has also proposed to assess in a preliminary way the impact of foundation drain removal. The cost for this assessment would not exceed $2 ,000 . 2 . Short-Elliott-Hendrickson submitted a quote not to exceed $8 , 000 . 00 to study the hydrology of the sanitary sewer and devise a method to assist in backing up the main lines. The manhole covers have been -ordered and -will be in place in the spring of 1988 . This will help to correct some of the back up • problems.