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F-8. CHANGE ORDER FOR CONTRACT WITH AMES CONSTRUCTION, INC. - WHITE TANKS FLOOD RETARDING STRUCTURE REMEDIATION Approve Change Order No. 16, in the amount of $658,921.25 to Flood Control District of Maricopa County (District) Contract FCD 2004C017 – White Tanks Flood Retarding Structure (FRS) No. 3 Remediation Phase 1 (Project [#4701]), with Ames Construction, Inc. (Contractor). Change Order No. 16 is the final close-out change for this contract and is required to address compensating the Contractor for the final agreed quantity of Soil Cement installed and the associated increase in imported aggregate; for an agreed split of the excessive quality control costs; for additional Time and Materials charges for silt fence installation and repair; for the balancing of the final bid quantity overrun and under-run; and for a thirty day extension of the contract time to September 20, 2008. On November 17, 2004 (Agenda C-69-05-064-5-00), the Board authorized the District to issue an Invitation for Bids (IFB) and award a contract for the Project to the lowest responsible bidder, if the bid is not more than 10% greater than the engineer’s estimate. The District issued the authorized IFB and received bids on September 20, 2005 from two bidders. Ames Construction, Inc. (Contractor) submitted the lowest responsible bid in the amount of $9,498,370.00 and the consulting engineer’s estimate was $9,480,527.41. The Project contract was executed by the Chairman of the Board and Clerk of the Board on October 18, 2005. The Contractor was to complete the contract by August 29, 2006 (i.e. 315 calendar days). Since execution of the contract, a total of sixteen (16) change orders (including the proposed No. 16) have been initiated which have increased the total contract amount from $9,498,370.00 to $14,003,386.14, an increase of $4,505,016.14 (+47.43%) and extending the contract completion by 753 days to September 20, 2008. (C-69-09-009-5-00)