Professional Services for Borregas Ave Storm Drain Rehabilitation
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Description
<p>A. INVITATION</p><p>The City of Sunnyvale is seeking proposals from licensed Engineering firms to provide professional</p><p>services for design, preparation of bid documents, and construction support for the</p><p>Replacement/Repair/Rehabilitation of Storm Drain Project – Borregas Ave. The scope of work generally</p><p>includes preparation of design development, bid documents, and bidding/construction support for Public</p><p>Works competitive bidding. Ancillary work includes environmental needs assessment and document</p><p>preparation, construction cost estimating, schedule monitoring, preparation of reports, providing</p><p>recommendations, and project management.\.</p><p>Location</p><p>The project sites are largely located on Borregas Avenue between the 237 and 101 Freeways and on</p><p>Alturas Avenue between Borregas Avenue and W. Ahwanee Avenue. These streets have no signalized</p><p>intersections</p><p>B. PROJECT DESCRIPTION</p><p>This storm drain (SD) project generally includes the following work:</p><p>• Rehabilitate of approx. 2,200 LF of existing 16” SD</p><p>• Replace approx. 350 LF of existing 15” SD with 18” SD.</p><p>• Install approx. 500 LF of new 24” SD.</p><p>• Perform SD connections and disconnections with existing junction structures.</p><p>• Install new SD manholes, one of which will include a flow throttling function.</p><p>The existing 16” SD pipe to be rehabilitated is very old, deformed, and fractured Vitrified Clay Pipe</p><p>(VCP). Some areas are at risk of collapse if the rehab method disturbs the pipe wall. Slip lining and</p><p>spiral wound lining are not practical for this reason, and because they do not maximize the post-project</p><p>pipe ID. Pipe bursting to the same ID or larger appears impractical due to pipe size, shallow pipe depth,</p><p>and risks to crossing utilities and the street surface. Cured-in-Place Pipe (CIPP) lining is anticipated to</p><p>be the preferred alternative. CCTV of the entire length of the existing 16”…