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7.1.B. - Page 1 <br /> REPORT <br /> To the Honorable Mayor and City Council <br /> From the City Manager <br /> April 28, 2014 <br /> SUBJECT <br /> Professional Services Agreement in the amount of $88,464.00 with Environmental <br /> Science Associates for Hydraulic Analysis and Maintenance Program for the Redwood <br /> Shores Lagoons <br /> RECOMMENDATION <br /> By motion, approve and authorize the City Manager to execute agreement for <br /> professional services in the amount of $88,464.00 with Environmental Science <br /> Associates ("ESA") for hydraulic analysis and maintenance program for the Redwood <br /> Shores Lagoons. <br /> BACKGROUND <br /> The lagoon is a focal point of the housing and retail development in Redwood Shores, <br /> and contributes to the area's visual aesthetics, aquatic habitat, and recreation (boating, <br /> swimming, and windsurfing). The lagoon serves as a stormwater retention pond, storing <br /> surface runoff during periods of high tide in San Francisco Bay. The City's Public Works <br /> Division manages the overall operation and maintenance of the lagoon, in cooperation <br /> with the Parks, Recreation and Community Services Department, and county, state, and <br /> federal oversight agencies. <br /> Water quality is maintained by maximizing the lagoon tidal water exchange rates. By <br /> maintaining Bay-like conditions through good water circulation, aquatic infestation, <br /> thermal gradients and stagnant conditions can be avoided in addition to helping mix, <br /> dilute and move pollutants from urban runoff through the system. <br /> ANALYSIS <br /> The purposes of this hydraulic analysis are to (1) determine circulation rates of the <br /> Redwood Shores lagoon system under existing conditions, (2) identify locations within <br /> the lagoon system where waterway circulation is inadequate to maintain water quality, <br /> (3) develop schemes based on model runs to improve circulation, ranging from minor, <br /> small scale modifications to substantial, large scale modifications, and (4) develop an <br /> annual maintenance program for Redwood City Public Works staff to maintain desired <br /> circulation rates. <br /> Staff received responses from ESA, Wood Rodgers, Wreco, Moffatt & Nichol and Alden <br /> to the Request for Proposal issued on October 28, 2013. The five proposals were <br /> independently reviewed by five members of the Community Development staff and <br />