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HomeMy WebLinkAbout05/03/2011, C 2 - MARSH STREET BRIDGE REPAIR, SPECIFICATION NO. 90480 council '*`&` May 3,2011 j acEnaa PEpont Nubc� CITY OF SAN LUIS OBISPO FROM: Jay.D. Walter, Director of Public Works 7DW Prepared By: Michael J. McGuire, Engineer III SUBJECT: MARSH STREET BRIDGE REPAIR, SPECIFICATION No. 90480 RECOMMENDATION Reallocate design and construction funding from the Chorro Street Bridge Rehabilitation project . to "Marsh Street Bridge Repair, Specification No. 90480". DISCUSSION The Marsh Street Bridge, near the intersection of Marsh and Santa Rosa Streets, was built in 1909 and over the years has received occasional minor repair work by City maintenance staff. More intense maintenance was scheduled as part of the 2007-09 Financial Plan to replace heavily damaged bridge rails, and to patch and seal the deck. As a condition to use federal bridge funding for the work, a structural review was completed. The review indicated the bridge deterioration was too significant to be ameliorated only by maintenance and that more intensive rehabilitation work and possibly replacement of key structural components will be required. A maintenance inspection conducted by the State of California Department of Transportation in 2008 supported this finding with the overall bridge rating dropping nearly 30 points since 2004, to a rating of 64 out of 100, indicating an accelerating decline. The Chorro Street Bridge was also included in the 2007-09 Financial Plan for rehabilitation work (Attachment 1). Staff has determined that while the Chorro Street Bridge is also in need of structural repairs, the Marsh Street Bridge is in greater need of the limited resources available for bridge repair work, because of its deteriorating condition and the volume of traffic carried. As part of the 2009-11 Financial Plan, staff prepared a future funding request with the assumption that the Chorro funding allocated in the 2007-09 Financial Plan would be shifted to this project. The write-up clarified that staff would bring this realignment forward for formal Council consideration (Attachment 2). At this time, staff is requesting formal Council action to shift the currently allocated funding for the Chorro Street Bridge project to the Marsh Street Bridge project. The Chorro Street Bridge project will then be undertaken at a future date. Due to the historical nature of the bridge, and the complexity of engineering involved for a bridge on a major arterial critical to the efficient traffic flow through downtown, staff will contract with one of the City's pre-qualified on-call design consultants with bridge experience to provide the design services for this project. The consultant will provide an in-depth structural assessment of the present damage to the bridge and determine the type and feasibility of repair. Based on that assessment, the consultant will prepare plans, specifications and cost estimates (PS&E) for the bridge work. Included in this work would be coordination with various agencies C2-1 Marsh Street Bridge Repair(90480) Page 2 regarding environmental, historical and right-of-way mitigation requirements. Staff will also work with area businesses to coordinate the work. FISCAL IMPACT No additional funding allocation is being requested as part of this funding shift. The original Chorro Street Bridge project is included in the 2007-09 Financial Plan and identifies a project budget to support the initial phases of the project. The Marsh Bridge project was proposed to assume this funding in the 2009-11 Financial Plan. Construction funding is anticipated to be requested as part of the 2013-15 Financial Plan. �— 2008-09' 2014-15+ (Chorro Bridge), (Proposed)!_, Environmental Review: $250,000! i Design - ^�— $250,0001 i !Land Acquisition: �— -- $50,0001 Construction _ v �__ j _— $5,500,000 ! Construction Management: ! $600,0001 Total $SSO01000 $6,100,0001 $6,650,000 The majority of funding is anticipated to come from the Federal Highway'Bridge Replacement and Rehabilitation (HBRR) program. The program provides an 88% grant, with the City providing a matching fund of 12%. This Federal funding is currently being applied for by staff through the State. Currently, there is no funding available in the Marsh Street Bridge Repair budget. Reallocation of funds from the Chorro Street Bridge project to the Marsh Street Bridge project will allow staff to move forward with the preliminary design. ALTERNATIVE Deny reallocation of Chorro Street funding. Rehabilitation work would begin on the Chorro Street Bridge prior to any work on the Marsh Street Bridge. While repairs are needed to the Chorro Street Bridge, the Marsh Street Bridge is a more immediate priority due to its deteriorating condition. Delaying work on the Marsh Street Bridge could result in partial or full structural failure of the bridge, disrupting traffic flow and causing expensive emergency repairs. ATTACHMENTS 1. 2007-09 Financial Plan, Appendix B, pages 3-312 to 3-314 2. 2009-11 Financial Plan, Appendix B, pages 3-249 to 3-252.. T7 T 7147 _7717 \\chstore4\Team\Cound1 Agenda Reports\Public Works CAR\2011\CIP\90480 Marsh Street.8r1dge\90480 CAR Reallocation 2.doc C2-2 - Attachment 1 - ` . .A , ti CHORRO STREET BRIDGE REHABILITATION Project Manager and Team Project Manager CIP-Engineering Project Team Public Works,Community Development,Administration/Natural.Resources Protection Alternatives I. Delay or deny the project„ Under this option,deterioration would continue and become irreversible. Eventually the bridge will become impassable and have to be replaced at a higher cost. Disruption to the creek,the community,and nearby business would be more intense and time-consuming. 2. Change the scope of the project. As shown in this request,there are several bridges eligible for replacement or rehabilitation. Any one of these structures could be selected for action. Initial costs would be similar. Long term construction costs will be higher for the replacement projects. Operating Program Creek and Flood Protection Project Effect on the Operating Budget Project Implementation Public Works: 3,200 hours(over the life of the project) Community Development:40 hours(over the life of the project) Natural Resources Protection: 20 hours(over the life of the project) Facility Operation Costs for major maintenance of a rehabilitated structure would be postponed for 20 to 50 years. !i Location Map i i■ii ;; j! t i i 5 II Af hI ii 3-314 3 9 i C2-3 Attachment 2 TRANSPORTATION MARSH STREET BRIDGE REHABILITATION CIP Project Summary Rehabilitating the Marsh Street Bridge near Santa Rosa Street will cost $3,500,000 for construction and construction management in 2011-12. Project Objectives 1. Prevent catastrophic failure of the bridge. 2. Extend the service life of the bridge to avoid the high cost and disruption of premature bridge replacement. Existing Situation The Marsh Street Bridge over San Luis Obispo Creek is located between Santa Rosa and Osos streets. It was built in 1909. The bridge has some structural issues that need to be addressed. This bridge was proposed for maintenance work only as part.of the 2007-09 Financial Plan. A site visit showed that since the time of the original proposal for work, the bridge had deteriorated to the point where basic maintenance would not address the issues. During budget reductions in September of 2008, Public Works staff recommended the maintenance project be deleted and followed up with a broader proposal. The Chorro Street Bridge was also included in the 2007-09 Financial Plan for rehabilitation. Staff has determined that this structure is in greater need of the limited resources available for bridge work and will request Council to convert the funding for the Chorro Bridge to Marsh Bridge. Chorro Bridge will then be resubmitted for funding at a future date. The Marsh Street Bridge suffers from several problems. Currently one of the upstream wing walls is cracked through horizontally. The wing walls serve as extensions of the walls supporting the deck and holding up the street adjacent to the bridge. This crack has allowed the lower portion of this wing wall to shift outward,dragging the bridge railing along with it. So far the wing wall has shifted about four inches and the bridge railing above it has moved about one inch. The failure is likely the result of water behind the wall possibly acting on an existing crack, forcing the wall out. While the bridge itself is not directly threatened by this, the street and railing are. Unless corrected,this movement will continue until the street on that side fails. j During the recent review of the bridge, the underside of the deck (soffit) showed several areas of exposed reinforcing. The number of exposed areas has increased considerably from the prior inspection. The wet weather also revealed several areas where there is concentrated seepage. Also, some reinforcing steel has broken and there are significant areas of concrete spalling, a clear indicator of active corrosion occurring within the structural deck From the sidewalk, particularly on the south side, the condition of the rail is evident. The reinforcing has corroded completely away in places and has ruptured the rail along the entire length. The end of the rail has been hit and a section of the rail had to be removed, revealing that the rail is not connected to the bridge deck. The north side has a similar,though not as pronounced,problem. Research of construction documents indicates the creek has scoured since the construction of the bridge to the point where there is the potential for the bridge footings to be undermined. I This project will contain a more thorough structural and safety assessment of the bridge condition and the design mitigation that will be needed to insure a structurally sound and safe bridge for the City. i I I 3-249 C2-4 • Attachment 2 TRANSPORTATION MARSH STREET BRIDGE REHABILITATION Goal and Policy Links 1. Transportation Planning and Engineering goal: safe and well-maintained streets 2. 2005-07 Financial Plan Appendix B page 165 3. 2007-09 Financial Plan,Appendix B,Page 308(Funding from Chorro Bridge Page 312) 4. Measure Y Priority—Creek and Flood Protection 5. 2009-11 Major City Goal: Infrastructure Maintenance Project Work Completed In 2006 the Federal Highway Bridge Rehabilitation and Replacement program notified agencies that they would consider maintenance projects for funding, something they had not previously done. Staff was able to take advantage of that funding and obtained a bridge specialist to review the site in detail with the staff. Environmental Review This project will require a mitigated negative declaration from the City and may also require a Memorandum of Understanding from the State Historical Preservation Officer due to the historic designation of the bridge. The most significant environmental issues will probably relate to impacts on the creek beneath the bridge structure. There will also be impacts on nearby residents and businesses. Project Constraints and Limitations 1. The project will involve rehabilitation or replacement of a designated historic structure. 2. State Department of Transportation clearances and reviews will be required at various stages of the project in order to obtain federal grant assistance. 3. Several permits will be required from agencies responsible for regulation of activities in and around waterways. 4. Work on this structure will present a significant disruption to traffic and the adjacent businesses. Coordination with business owners, obtaining alternate access, and advertising of the work will reduce those impacts. Stakeholders i Area businesses are the most likely to be impacted by the construction aside from the general traveling public. Staff will meet with the business or property owners as the project progresses to discuss strategies to mitigate the construction. Any necessary conditions for construction can then be incorporated into the construction specifications. i 3-250 C2-5 • Attachment 2 TRANSPORTATION MARSH STREET BRIDGE REHABILITATION Project Phasing and Funding Sources Pro ect Costs bv Phase Project Costs Budges-to-Date 2009-10 2010-11 2011-12 2012-13 Total Environmental Review 250,000 250,000 Design 250,000 250,000 Land Acquisition 50,000 50,000 Construction 3,000,000 3,000,000 Construction Management 500,000 500,000 Total 550,000 - _ - 3,500,000 - 4,050,000 Pro'ed Funding by Source Project Funding Sources To-Date 2009-10 2010-11 2011-12 2.012-13 Total General Fund 63,085 401,400 464,485 Grant Fund(HBRR Grant) 486,915 3,098,600 3,585,515 Total 550,000 3,500,000 4,050,000 Key Project Assumptions The costs are based on recent construction and could change with increases in costs for labor,steel, concrete and fuel. The project description assumes we will be able to complete the necessary work without obtaining regulatory agency permits which would delay the project by as much as two years. Project Manager and Team Support Project Manager CIP.Project Engineering Project Team Public Works Administration Community Development Natural Resources Protection Alternatives Deny or Defer the Project. Under this option,deterioration would continue and become irreversible. Eventually, the bridge will become a safety hazard and unusable for traffic, and will have to be replaced at a higher cost. Disruption to the creek,the community and nearby businesses would be more intense and time-consuming. Operating Program Creek&Flood Protection i 3-251 C2-G • Attachment 2 TRANS MARSH STREET BRIDGE REHABILITATION Project Effect on the Operating Budget. Project Management CIP Administration: 150 hours CIP Engineering: 1500 hours—duration of the project CIP Inspection: 1500 hours—duration of the project Community Development: 40 hours Natural Resources: 40 hours Operation and Maintenance after Project Completion Future maintenance costs for this bridge will be reduced. Location Map v "o 3-252 C2-7