(15)AR 082107 Engineering Resources of Southern California

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ITEM #15 CITY OF COLTON AGENDA REPORT FOR THE CITY COUNCIL MEETING OF AUGUST 21, 2007 TO: HONORABLE MAYOR AND CITY COUNCIL MEMBERS FROM: AMER JAKHER, P.E., PW DIRECTOR / CITY ENGINEER SUBJECT: ADOPT A RESOLUTION INCREASING THE 2007/2008 CAPITAL IMPROVEMENT PROGRAM BUDGET IN THE AMOUNT OF $100,000; APPROVE AN AMENDMENT TO THE DESIGN AGREEMENT AWARDED TO ENGINEERING RESOURCES OF SOUTHERN CALIFORNIA INC. FOR THE 3-5 COMPREHENSIVE STORM DRAIN PROJECT, PHASE III, IN THE AMOUNT OF $86,917. DATE: AUGUST 13, 2007 BACKGROUND: To address the flooding that occurs along Valley Boulevard during periods of substantial rainfall, a Comprehensive Storm Drain Plan No. 3 (Project 3-5) was originated in 1973. In 1986, an Engineer's Report, prepared by county Flood Control District staff, suggested twelve possible alignments including retention basins, subsurface storm drains and open channels. However, the proposed alignments were found to environmentally impact the existing Delhi Sands Flower Loving Fly habitat located along the extension of Pepper Avenue, south of Slover Avenue. The City of Colton proceeded to further analyze additional alignments and adopted an alignment method that would not disrupt the habitat of the Delhi Sands Flower Loving Fly, this alignment is now referred to as the 3-5 Comprehensive Storm Drain Project Phases I - V. Council action on March 16, 2004 awarded the design of Phases I -III to Engineering Resources of Southern California, in the amount of $387,055. Design plans for Phase III of the adopted alignment have been completed and the design for Phase 11 is ongoing. ANALYSIS/DISCUSSION: At this time one of five phases correspondent to the 3-5 Project have been completed, Phase III. Additional tasks were performed by Engineering Resources in the design phase due to the soil conditions experienced during the construction phase Due to an unexpected soil and field conditions, including protection of existing utilities, the railroad bridge, and the electric tower, changes to the plans and the methods of construction were required.. The additional services requested of the consultant were: 1) revision of the plans to incorporate the jack and bore operations utilized to obtain access under the Union Pacific Railroad 2) preparation of structural calculations and report required by Union Pacific Railroad's engineering division, 3) processing of the modified design plans through the State of California Department of Industrial Relations, Division of Occupational Safety and Health to obtain an Underground Classification Permit needed to proceed with the jack and bore operations 4) complete structural calculations establishing the impact of the