TITLE
Recommendation to authorize City Manager to accept grant funding in the amount of $3,300,000 from the State Water Resources Control Board, and $690,997 from the State Coastal Conservancy, for the Colorado Lagoon Restoration Project; adopt resolution approving the receipt of grant funds; execute all documents necessary to allow for the dredging, treatment and disposal of sediments from Colorado Lagoon;
Increase appropriations in the Tidelands Operations Fund (TF 401) in the Department of Public Works (PW) by $3,990,997; and
Execute an amendment to Agreement No. 30773 with Moffatt & Nichol Engineers to increase the contract amount by $91,100 for a total amount not to exceed $1,442,700 for additional construction support services and post-construction sediment sampling, and any amendments necessary to extend the term, amend the scope of work, or adjust the fee schedule of hourly rates for inflation in the extended term. (District 3)
DISCUSSION
The Colorado Lagoon (Lagoon) is a 28.3-acre tidal lagoon located in the middle of a suburban neighborhood (location map attached). It serves three main functions: 1) hosting sensitive estuarine habitat; 2) providing public recreation (including swimming); and, 3) detaining and conveying storm flows. A Master Restoration Plan for Colorado Lagoon (Master Plan) has been developed and is being implemented as funding becomes available.
Projects to improve water quality and reduce future recontamination by redirecting low flow urban runoff into the sanitary sewer system and capturing trash at the storm drain outlets were completed in December 2010. The next phase of the Colorado Lagoon Restoration project involves the dredging, treatment and disposal of contaminated sediment that has accumulated over time. The dredging component of the Colorado Lagoon Restoration project is being mandated by the Board through Total Maximum Daily Loads (TMDLs), which establish targets for water and sediment quality that must be achieve...
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