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HomeMy WebLinkAbout03/21/1989, 6 - SUBMITTAL OF PLANS AND SPECIFICATIONS FOR ""STORM DRAIN IMPROVEMENT PROJECT: HIGUERA ST. AND SANTA R" • MEETING DATE: i� City Of San Luis OBISPO March 21, 1989 COUNCIL AGENDA REPORT ITEM NUMBER FROM: David F. Romero William T. Hetland Prepared by: Gary Hendersonawti Public Works Director Utilities Director Civil Engineer SUBJECT Submittal of Plans and Specifications for "Storm Drain Improvement Project: Higuera St. and Santa. Rosa St.; and Waterline and Sewerline Projects: Higuera St. - Oscs to Santa Rosa; City Plan Nos. N-10E, N-53P & N-54R." RECOMMENDATION: Approve Plans and Specifications, Authorize Staff to Advertise for Bids and Authorize CAO to Award Contract. BACKGROUND: The Flood Management Policy adopted on June 1983 identitied 17 street drainage improvement projects around the City. This project is one of the six remaining projects listed in the policy (pg. E-2b). The storm drain project proposes to construct anew 6'x 8' box culvert under _ Higuera and Santa Rosa Streets that will serve to bypass and replace an ( existing storm drain under existing buildings on the northerly side of Higuera Street. The existing box structure was privately installed years ago and is undersized and deteriorating. Once the project is completed, the existing culvert will be the responsibility of the property owners who still use the culvert for their site drainage. The storm drain project was included in the 1987-89 Capital Reinvestment Plan at an estimated cost of $250,000. Due to the the large size culvert required to adequately ccuvey the flood flows, and the depth at which this culvert must be constructed, which were not anticipated, the cost is higher than previously estimated. The waterline and sewerline projects were added when it was determined that the storm drain project could not be constructed without completely closing the streets. Maintenance crews were consulted and it was determined that the water and sewer lines in Higuera Street have been a continuing maintenance problem, and it was felt that since the streets have to be closed, this would be an opportune time to replace these facilities. This project has been given an SIR clearance by the Planning Department. Status: Categorical Exemption. SIGNIFICANT IMPACT: Storm Drain Waterline ::ewerline N-10E N-53P N-54R TOTAL Base Bid: $405,450 $43,720 :619,250 $468,420 Contingencies 32,430 4,370 1 ,920 38,720 Total: $437,880 $48,090 $21 ,170 $507,140 1111m pllogwiigI City of san [UIS osisim SMIGn COUNCIL AGENDA REPORT City Plan No. N-10E Meeting of March 21 , 1989 Page Two. There was $250,000 budgeted for the storm drain project. Additional money will need to be transferred from the CRP appropriation of the Capital Outlay Fund to cover the additional costs for the storm drain, waterline and sewerline, once bids are received. CONSEQUENCE OF NOT .TA$INO ACTION: The substandard condition will remain and the existing culvert could fail which could cause blockage and flooding of privtte property in the area. Also, costs may be higher at a later date. ACTION RECOMMENDED: Approve plans and specifications, authorize staff to advertise for bids and authorize CAO to award the contract. APPROVED: City A nistrative Officer City At ney 4 2��= Finance Director itC y Engin .,� oject Man er Plans and specs available in Council Office for inspection. I i_ gwh8/n10e-sr 6 ® Z.