AgdaPkt 2000-05-22 - Laserfiche WebLink

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II 8-2. Redwood City staff is working with Foster City and San Mateo representatives to develop the new joint Lagoon Management Plan. Contract Time Extension Staff recommends that the current Waterworks Industries, Inc. agreement be extended by eighteen months through December 31,2001. This will provide continuity of needed lagoon management services with the least disruption as the three cities prepare the joint Lagoon Management Plan. Once the new plan and performance measures are developed next summer, staff will prepare a new request for proposals for lagoon management services, or recommend to Council an alternative proposal to maintain the lagoon in the most environmentally sound and cost effective manner. Contract Funding As of February 29, 2000, $3,377 remained unspent and available to fund maintenance activities under the current agreement for the remainder of this fiscal year. As authorized under Section 21 Changes of the agreement, the Public Works Services Director issued Task Order No.2, on April 3, 2000, adding $10,000 to the agreement to provide funding through the date of Council action on this report. Task Order No.1, executed on January 24, 2000, did not change the total compensation provided for in the agreement. A three-year historical trend analysis of maintenance expenditures for the period of March through June for the past three years ranges from $40,000 to $60,000, however our projection for the cost of continuing lagoon maintenance services from March - June 2000 is $94,700. There are several reasons for this increased cost projection: 1. Weather conditions, nutrient loading and flushing rates dramatically affect the growth rate and proliferation of widgeon grass and algae. (This winter has been mild, resulting in warmer water which is advantageous to algae and weed growth). 2. In the older portions of the lagoons, a copper-based aquatic herbicide and algaecide, which acted as a long-term soil sterilent, was used for many years before it was banned in the late 1980's. The residual effect of this chemical has worn off allowing widgeon weed and algae to again grow in areas where it had not been a problem for several years. 3. As the lagoons gradually fill in with sediment over time, the water depth becomes shallower, allowing increased sunlight to stimulate plant growth. 4. Recent development has increased the water acreage and management complexity of the lagoons that must be maintained. For example, the lagoons associated with the Gossamer Cove Development are small and require more maintenance. 5. Depending on the severity of algae and widgeon weed outbreaks in the smaller lagoons and the section of the large lagoon cut off from boat access by Shell Parkway, a crane may be necessary to deploy the harvester, resulting in increased equipment charges from the contractor. 2