The URL can be used to link to this page

Home My WebLink About07/06/2004, C3 - MARSH STREET SEWER IMPROVEMENT PROJECT, SPECIFICATION NO. 90248 councit Wee Dep July 6, 2004 j acjcnaa izEpoat 'wmNumbe. C3 C I T Y OF SAN L U IS O B I S P O FROM: Michael D. McCluskey, Director of Public Works PbK Prepared By: Christine Cornejo, Engineering Technician SUBJECT: MARSH STREET SEWER IMPROVEMENT PROJECT, SPECIFICATION NO. 90248 CAO RECOMMENDATION 1. Approve plans and specifications for "Marsh Street Sewer Improvement Project, Specification No. 90248." 2. Authorize staff to advertise for bids for Specification No. 90248 and authorize the CAO to award the contract to the lowest responsible bid that is within the Engineer's Estimate. DISCUSSION Replacement of wastewater collection pipes is part of an ongoing program to replace aging and deteriorating infrastructure. This program has several objectives: 1) Ensure reliable removal of waste, 2) Reduce the need for emergency repairs, and 3) Reduce the need for preventive maintenance. This project will accomplish these objectives for part of the City wastewater collection system. Based on past experience, it takes about three months from the time the City Council authorizes a project to go to bid for a project to start construction. That means, work is expected to start in the middle of September and should be completed by the end of October. The project will start at the intersection of Marsh and Santa Rosa which is within the vicinity of the new County Building project site. The Contractor will be required to coordinate his work with the contractor on the County Building site. CONCURRENCES Community Development Department has given this project a categorical exemption. FISCAL IMPACT The engineer's estimate for the sewer line replacement portion of this project is $206,700 and $21,800 for the traffic signal interconnect installation. The sewerline replacement was approved as one of the collection system improvements in the 2003-05 Financial Plan, Appendix B, page 102. The project scope has been slightly modified to not only include replacing the sewer line from Santa Rosa to Toro but the continuing block of Marsh, Toro to Johnson, as well. Funding for this project will come from the sewer collection system improvements capital improvement project account, which has a current balance of$255,400.. 06 -1 I I J Marsh Street Cower Improvement project Page 2 On review of the project by Public Works, an additive alternate to place Interconnect Conduit, was included in the project. By installing conduit in the sewer trench, it will close a gap in the existing traffic interconnect system. Staff feels it would be cost effective to lay conduit in the same trench as the sewer,thereby saving trenching cost. Funding for this portion of the project will come from the Signal Interconnect project in the capital outlay fund, street and flood control account, which is funded by grant monies from the Regional State Highway Account. The current balance of this account is $20,108. Should bids come in over the engineers estimate, the interconnect conduit as an additive alternate will be removed from the project. Specification No. 90240 Sewer Traffic Signal Interconnect Construction: $ 18000. $ 17,800.00 Construction Contingencies: $ 18,630. $ 1780.00 Total for Construction: $ 204,930 $ 19,580.00 Miscellaneous: (printing): $200 Materials Testing: $1,500 Total Cost: $ 206,630. $ 19,580.00 Budget: Sewer Fund Traffic Signal Interconnect Fund Total Project Costs: $ 206,630. $ 19,580.00 Budget Available: $ 255,400. $ 20,108.00 ' ALTERNATIVES Delay the project: Because the pipeline has been in place since the year 1917, its deteriorating condition has become a maintenance concern. Staff sees no alternatives to completing the project. However, staff has looked at alternative timing. The issue of construction near the downtown at the same time as work is occurring on the County Building and Copeland projects was raised. Staff looked at the concept of delaying the construction of these utility lines downtown until the construction of the buildings was complete. Pros for postponement: • The project would not contribute to the congestion resulting from the construction of the County building and the Copeland Projects. Cons for postponement: • Potential costly emergency repairs resulting from the existing pipeline failing. • City Construction would interfere with the operations of these new facilities when they opened. The Utilities Department recommends the project proceed on schedule. The City adopted budget approved the project and its timing with full knowledge of both the County and Copeland a3 �a L� Marsh Street Sewer Improvement prQject Page 3 projects being under construction. Therefore, taking all things into consideration, it appeared best to move forward with the project at this time rather than delaying it to next year. ATTACHMENTS 1 —Project Location Map Plans and Specifications are available in the Council office for review. 9:\current projects\sewer\90248 marsh santa rosa to Johnson\documents\1-staff reports\90248 car adv.doc c3- 3 �• ' \ fir �y � � ATTACHMENT 1 ' AA ' (E) SIGNAL INTERCONN ADDITIVE ALTERNATE S� SIGNAL S� INTERCONNECT QPM' P/ ' � o REMOVE . 9L� , & i- REPLACE `�'y S� REPLACE SEWERLINE S 9 - \ QPG CrCyor MARSH STREET SEWER IMPROVEMENT M LUIS OB1SpO PROJECT LOCATION MAP Public Works Department Specification No. 90248 n-4 955 Morro Street San Luis Obispo, CA 93401