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Home My WebLink About06/05/2007, C7 - 2007 ARTERIAL STREET SLURRY SEAL PROJECT, SPECIFICATION NO. 90680 i counat M�°s°� 2 une_5,20.Q7 agenda RepoRt �H Crl CITY OF SAN LUIS OBISPO FROM: Jay D. Walter, Public Works Director Prepared by: Daniel Van Beveren, Senior Civil Engineer SUBJECT: 2007 ARTERIAL STREET SLURRY SEAL PROJECT, SPECIFICATION NO. 90680 CAO RECOMMENDATION: 1) Approve Special Provisions for 2007 Arterial Street Slurry Seal Project, Specification No. 90680; 2) Authorize staff to advertise for bids; 3) Authorize the CAO to award the contract if the lowest responsible bid is within the engineer's estimate of$800,000. DISCUSSION The City's Pavement Maintenance Plan (PMP) was adopted by the City Council on April 14, 1998. The key elements of the PMP include establishment of eight pavement maintenance areas within the City and a maintenance plan in which each of these eight areas will receive maintenance over an eight-year period. With the budget cutbacks of the past few years, the above-mentioned pavement area rotation schedule was put on hold in 2005. The 2005-07 Financial Plan recommends pavement maintenance work to be limited to Arterial Streets for this two-year period. This recommendation is in part due to the reduced paving budget as well as the previously-deferred pavement maintenance efforts on Arterial Streets. In 2006, pavement repairs were completed on Arterial Streets citywide through the 2006 Arterial Street Repair Project. This project addressed virtually all of the locations on Arterial Streets throughout the City that were in need of immediate repair, and was successful in restoring the majority of the City's Arterial Streets to an acceptable condition. Once this project was completed, staff evaluated the condition of the remaining Arterial Streets and judged that the service life of ,several of these streets could be extended through the application of a slurry seal to the pavement surface. The objective of this year's Arterial Street Slurry Seal Project is to preserve the condition of selected Arterial Streets with the application of a Type II Slurry Seal to the surface of the pavement. The Type II Slurry Seal, which has been used for several years, has generally yielded successful results and has been found to be an extremely effective approach in pavement preservation. Staff has researched the possibility of using a Type III slurry seal, a somewhat more rugged seal, but has decided against it for several reasons. The cost is about 60% higher than Type II, which would not allow as much work to be done. Also, we received many complaints, Council Agenda Report—2007 Arterial Street Slurry Seal Project, Specification No. 90680 Page 2 especially from bicyclists, when we used the Type III slurry in the past. It is rougher, and not a bicycle friendly application when used over bike lanes. Additionally, the existing pavement surface roughness is a factor in deciding which slurry to use, and the selected streets in this project call for a Type II mix. With rising costs of construction, especially asphalt products, we continue to find it difficult to stretch the available funds to meet the needs. Slurry seals cost about one-tenth of what an overlay costs, so we will likely be using pavement repair and slurry sealing as a primary component of our pavement strategy. In anticipation of this slurry seal project, the City's Street Maintenance crews have aggressively performed isolated pavement repairs and crack sealing on the streets included within the scope of this project. This preparatory work is now complete and will increase the long-term effectiveness of this slurry seal application. Following the completion of this Arterial Street Slurry Seal project, Los Osos Valley Road(LOVR) will be resurfaced from the 101 freeway to the northern City limits. The particular surface treatment selected for LOVR in this upcoming project is based on field deflection testing of the pavement, and will include a combination of an asphalt overlay and microsurfacing, a seal coat which is similar to a slurry seal. The LOVR project will be administered in a separate contract from this Slurry Seal project and will be presented to City Council for approval later this year. As reported to Council during the February 20th study session on summer paving plans, the Madonna Road work is planned as a slurry seal rather than a paving project. Recent pavement repair work has been completed making it unnecessary to apply more than a seal. The-street crew has spent the last two years concentrating on arterial street repairs, and while they may not look "pretty" in some locations, this work has provided a solid base which will extend the life of the street,while we invest in higher priority locations. With the passage of Measure Y in ,November 2006, the City is positioned to focus more resources on restarting the neighborhood paving plan in the coming years. There will be some arterial street paving that will be done as part of that effort, and this slurry seal project will help buy some time for those streets before they begin deteriorating again. CONCURRENCES A Notice of Exemption has been filed through the Community Development Department. FISCAL IMPACT The 2005-07 Financial Plan identifies $925,000 in year two for street•maintenance. Of that, $75,000 is identified for work downtown. There is currently $962,700 available in the street maintenance account, which includes a small amount carried over from last year's allocation. Council Agenda Report—2007 Arterial Street Slurry Seal Project, Specification No. 90680 Page 3 Estimated Construction Cost Engineer's Estimate $780,000 Contingencies $80,000 Money needed for inspection and testing services $20,000 Total Project Budget: $880,000 Current Balance in Street Reconstruction & Resurfacing Account $962,700 Amount budgeted for Higuera Street Paving Project - $75,000 Budget Available to support this project: $8879700 Following the opening of bids, a budget transfer will be processed which will include the sum of the actual bid amount plus the approved funds for project contingencies, inspection and testing services. This will create a project budget specific to this slurry seal project. ATTACHMENTS: Attachment 1. Location Map AVAILABLE FOR REVIEW IN THE COUNCIL OFFICE Specifications and the 1998 Pavement Management Plan are available in the Council office for review. 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