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WATER I ENERGY I LIF E 1W IINIZ WI& RIVERSIDE PUBLIC UTILITIES P U B LIC UTILITIES Board Memorandum BOARD OF PUBLIC UTILITIES DATE: OCTOBER 22, 2018 ITEM NO: 10 SUBJECT: BID NO. RPU -7597 FOR THE CONSTRUCTION OF THE IOWA AVENUE TRANSMISSION MAIN REPLACEMENT PROJECT — 1,240 FEET OF NEW POTABLE WATER PIPELINE — WITH TRAUTWEIN CONSTRUCTION, INC., IN THE AMOUNT OF $1,639,242 INCLUDING A 10% OR $163,924 CHANGE ORDER AUTHORITY AND WORK ORDER NO. 1903811 IN THE AMOUNT OF $2,140,000 ISSUES: Award Bid No. RPU -7597 to Trautwein Construction, Inc., for the construction of the Iowa Avenue Transmission Main Replacement Project in the amount of $1,639,242 including a 10% or $163,924 change order authority and approve the capital expenditure for Work Order No. 1903811 in the amount of $2,140,000. RECOMMENDATIONS: That the Board of Public Utilities: Award Bid No. RPU -7597 to Trautwein Construction, Inc., of Riverside, California, in the amount of $1,639,242 for the construction of the Iowa Avenue Transmission Main Replacement Project; 2. Authorize change order authority for the Trautwein Construction, Inc. Construction Contract in the amount of 10% or $163,924 for Bid No. RPU -7597; and 3. Approve the capital expenditure for Work Order No. 1903811 in the amount of $2,140,000 which includes all design, construction, paving, contract administration, inspection and construction change order authority costs for the Iowa Avenue Transmission Main Replacement Project. BACKGROUND: The San Bernardino Transmission Main (SBTM) is a critical pipeline for Riverside Public Utilities (RPU), as it delivers about 40% of the City's water supply each year. This pipeline begins near Baseline Street in San Bernardino and terminates at the Linden/Evans Reservoir Complex. The SBTM is roughly 12 miles in length and ranges in size from 30 to 54 inches in diameter. The original 1920's era SBTM was constructed of concrete pipe. Over the years, many segments of the original pipeline have been replaced with Cement Mortar Lined and Coated (CML&C) steel pipe. A concrete segment of the SBTM began leaking in February 2018. This segment is on Iowa Avenue between Palmyrita and Columbia Avenues which, for the purpose of this report, will be identified as the Iowa Avenue Transmission Main. Each piece of concrete pipeline is typically strong; however, the joints are fragile. Repairing this pipeline is challenging since repairs in one area (usually at joints) tend to disturb Page 70