(15)AR 080707 Randall Basin Project

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ITEM #15 CITY OF COLTON AGENDA REPORT FOR THE CITY COUNCIL MEETING OF AUGUST 7, 2007 TO: HONORABLE MAYOR AND CITY COUNCIL MEMBERS FROM: AMER JAKHER, P.E., PW DIRECTOR/CITY ENGINEER SUBJECT: AUTHORIZE SOLICITATION OF BIDS FOR THE CONSTRUCTION PHASE OF THE RANDALL BASIN PROJECT. DATE: JULY 30, 2007 BACKGROUND: As a result of the construction of the San Bernardino County Arrowhead Regional Medical Center in the City of Colton, the San Bernardino County Flood Control District (District) was conditioned to enlarge the capacity of the Randall Basin to accept additional flows and construct the improvements necessary for a detention basin. Randall Basin fronts Randall Avenue and lies within the cities of Colton and San Bernardino; the northern half of the basin lies within the jurisdiction of the City of San Bernardino and the southern half lies in the City of Colton. To obtain an increased capacity for the basin the following scope of work will be necessary: 1) excavation of approximately four (4) feet of sediment in the existing Randall Basin to increase the area of the basin bottom by 1.07 acres 2) relocation of the existing southern basin embankment fifteen (15) feet to the north 3) construction of a concrete outlet 4) construction of a spillway 5) installation of a 48 -inch RCP inlet structure within the basin and 6) installation of a 66 -inch RCP outlet structure within the basin. ANALYSIS/DISCUSSION: On July 17, 2007, Council approved entering into a Cooperative Agreement with the City of San Bernardino and San Bernardino County Flood Control District for construction of the noted improvements to Randall Basin. The County's staff has prepared the plans, specifications, and estimate for this Project; the Project is ready for the bidding process. As identified in the approved Cooperative Agreement, the City of Colton will act as the lead agency through this Project's construction phase. To ensure a wide range of potential bidders are reached the City will advertise in local newspapers and `plan houses' where contractors can view the Project's: plans, specifications and documents. In accordance to the City's purchasing ordinance, 0-12-03, Section 3.08.090, staff will complete the formal bidding procedure for this public project.