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W A I E R tH E RC.Y L I FE RIVERSIDE PUBLIC UTILITIES Board Memorandum P U 8 L I C U T I L I T I E S BOARD OF PUBLIC UTILITIES DATE: November 18, 2011 ITEM NO: 3 SUBJECT: CHANGE ORDER NO. 2 TO PURCHASE ORDER NO. 115708 INSTALLATION OF UNDERGROUND CONDUITS AND STRUCTURES AT IOWA AVENUE OVERPASS AT RAILROAD GRADE SEPERATION -WORK ORDER NO. 0807043 ISSUE: Board of Public Utilities (Board) approval is requested for Change Order No. 2 to Purchase Order No. 115708, in the amount of $15,554,95 for additional trenching, conduit and structure relocations due to field conditions. RECOMMENDATION: That the Board of Public Utilities approve Change Order No. 2 to Purchase Order No. 115708 in the amount of$15,654.95, BACKGROUND: Work Order No. 0807043 for installation of underground conduits and structures at the Iowa Avenue overpass was approved by the Board of Public Utilities on May 6, 2011 for an estimated capital expenditure of $923,800. The conduit and substructure portion of the project was issued to the Contractors' Panel for Energy Delivery Work on April 13, 2011. Bids were opened on April 22, 2011 and International Line Builders Inc,, of Riverside, California, was the lowest responsive bidder in the amount of $385,384.75. Change Order No. 1, in the amount of $38,539.57 was issued on June 20, 2011 for additional trench depth, increased concrete encasement strength and additional paving requirements per AT&T. This amount will be reimbursed under the Joint Trench Agreement. Change Order No. 2, in the amount of$15,654.95 is requested due to: • Extending additional boring, trenching and conduits lengths under a unit price extension due to field conditions; • Core drilling exiting structures for new conduits; • Having to pothole existing water lines to verify depths and exact locations in order to install new electrical and AT&T lines; • Overhead to underground conversion at an existing commercial service and conflicts with existing concrete footings; and • Re-excavating of 50 feet of AT&T encased conduits due to conflicts with a future sewer line. Board authorization is required as the cumulative change order amount exceeds 10% of the original purchase order amount. As summarized in the following table: