8N Consent 2011 0516 - Laserfiche WebLink

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CITY OF SAN LEANDRO APPROVED AND STAFF REPORT FORWARDED TO CITY COUNCIL a s DATE: May 16, 2011 Stephen L. Hollister City Manager TO: Stephen L. Hollister, City Manager FROM: Uchenna Udemezue, Director Engineering and Transportati i epartment 13Y: Kenneth Joseph, City Engineer ` Engineering and Transportation Departme7 / SUI3JECT PROJECT /PROJECT DESCRIPTION: RESOLUTION OF AWARD OF CONSTRUCTION CONTRACT TO ANDES CONSTRUCTION FOR THE SAN LEANDRO BOULEVARD (SLB) / DAVIS STREET SEWER CAPACITY IMPROVEMENTS - PHASE 1, PROJECT NO. 10- 593 -52 -247 SUMMARY AND RECOMMENDATION This project provides for a new 18 -inch sanitary sewer line on San Leandro Boulevard between West Juana Avenue and West Estudillo Avenue. Staff recommends award of the construction contract to Andes Construction in the amount 5425,010.00 for the subject project. BACKGROUND In 1995, the City completed a comprehensive Sanitary Sewer Master Plan that studied the sewer collection system. The study evaluated the physical condition of the City's sanitary sewer system and recommended specific projects to correct deficiencies. This project addresses the sewer lines that connect the area near East 14 Street and West Juana to Davis Street near Orchard Avenue. This collection of lines currently flow near capacity and will not have sufficient capacity to support any future increases in population or density. The alignment of the existing lines also crosses several private properties, including the BART station, making access for maintenance difficult. Several solutions to reroute sewer flow were examined based on effectiveness, cost, construction impacts, and maintenance access. The selected project will include: 1) installing an 18 -inch line along San Leandro Boulevard between West Juana Avenue and West Estudillo Avenue; and 2) the addition of four new manholes. A trench averaging 12 feet in depth will be required to align the pipe with the existing sewer lines and obtain enough slope to allow proper flow.