8G Consent 2009 0706 - Laserfiche WebLink

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CITY OF SAN LEANDRO STAFF REPORT DATE: July 6, 2009 TO: Stephen L. Hollister, City Manager FROM: Uchenna Udemezue, P.E., Direc Engineering and Transportation BY: Kenneth Joseph, P.E., City Engine~r i ,` SUBJECT/PROJECT DESCRIPTION: APPROVED AND FORWARDED TO CITY COUNCIL °~`'~ ~- tephen L. Hollister City Manager RESOLUTION APPROVING A CONTRACTUAL SERVICES AGREEMENT WITH CREEGAN + D'ANGELO CONSULTING AND CIVIL ENGINEERS RELATING TO THE PREDA STREET-SAN LEANDRO CREEK SANITARY SEWER UPGRADE PHASE 2, PROJECT NO. 593-52-121. SUMMARY AND RECOMMENDATION Staff recommends approval of a contractual services agreement with Creegan + D'Angelo Consulting and Civil Engineers (C+D), in the amount of $81,000 to provide design and environmental services for Phase 2 of the subject project. BACKGROUND Two large sewer main lines cross San Leandro Creek near the north end of Preda Street adjacent to Union Pacific's main rail line. The pipes are supported by two independent parallel bridge structures spanning approximately 80 feet. The bridges were constructed in 1938 and 1974. The crossings are considered potentially high-risk facilities because any sewer leaks could cause unacceptable environmental and water quality impacts, and associated costs for clean-up and repair could be monumental. Phase 1 of this project analyzed the stability of the creek banks and the structural performance of the pipelines, bridges and foundations under both normal conditions and during seismic activity. Deficiencies to the bridge trusses and pipeline joints were identified, while the foundations and bank stability appeared adequate. Structural improvements to the bridge truss structures could be augmented in place. However, upgrades to the pipeline will require excavation and disturbance into the creek banks, requiring agency permitting.