AgdaPkt 2009-12-14 - Laserfiche WebLink

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6.1 F Page 1 REP�RT To the Honorable Mayor and City �ouncil From t�te Ci Mana er December 14, 2�09 SUB.IECT Engineering and design services related to the maintenance dredging of the Redwood Shores Lagoon RECOMMENDATI4N Approve, by motion, Amendment No. 3 to the Professional Services Agreement with Moffat & Nichol for design and engineering services for the Redwood Shores Lagoon System Dredging project in #he amount of$35,230.00. BACKGROUND The Redwood Shores Lagoon System Dredging project is designed to improve the water quality and the serviceability of the storm drainage system. On November 14, 2005, Council approved the original agreement with Moffat & Nichol for professional services for Phase 1 of the Redwood Shores Lagoon System Dredging project in the amount of$106,764.00. The initial phase of this project included co{lecting and sampling dredge material and identiiying the specifc areas of the lagoon system that required dredging to remove sediment deposits. On November 24, 2008, Counci! approved Amendment No. 1 to the agreement in the amount of$49,34'I.00 #o perform services required by the recent addition of new sluice gates. Those services included site investigation, preparation of design plans and specifications, and construction support. On September 14, 2009, Council approved Amendment No. 2 in the amount $21,545.00 for finalizing the design and preparing addendums during bid advertising that included revisions to the plans and specifications to include additional compliance wi#h regulatory requirements. Amendment No. 3 is now required because staff did not know the full exEent of the construction support required for this project until the bids were opened and award of the construction contract by Councit on October 12, 20�9. Due to budget limitations, only the base bid item was awarded, which included hydraulic dr�dging of portions of the lagoon and pumping the spoil material (approximate[y 22,000 cubic yards) as beneficial reuse to Area H in Redwood Shores. The alternative bid item (which was not awarded) included dredging portions of the lagoon that contained material (approximately 12,000 cubic yards) that would need to be decanted, hauled, and disposed of at an approved land fi11. Amendment No. 3 provides for support during construction including periodic meeting attendance, respondfng to contractor inquiries, reviewing and approving submittals, reviewing and approving pay quantities, and reviewing and approving "as-built" record drawings for the base bid work only.