(13)AR 100708 Encroachment Permit

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ITEM #13 CITY OF COLTON AGENDA REPORT FOR COUNCIL MEETING OF OCTOBER 7, 2008 TO: HONORABLE MAYOR AND CITY COUNCIL FROM: MARITZA TAPIA, INTERIM PUBLIC WORKS DIRECTOR SUBJECT: APPROVE ISSUANCE OF AN ENCROACHMENT PERMIT TO THE DEPARTMENT OF WATER RESOURCES TO WORK TWENTY FOUR (24) HOURS FOR A PERIOD OF THIRTY TWO (32) DAYS DATE: SEPTEMBER 29, 2008 BACKGROUND: On April 21, 2008, Public Works Department received notification from the Department of Water Resources (DWR) that the Southern California Rail Authority (SCRRA) will be constructing a new Metrolink Commuter Rail System Eastern Maintenance Facility. The Metrolink Project will be located west of Boardwell Avenue between Johnston Street and Citrus Avenue, and is bounded on the southwest by the Lytle Creek Channel, within the City of Colton. DISCUSSION/ANALYSIS: The Metrolink Project will install a new commuter rail line, utility lines, access roads and other improvements within DWR's easement, at the above noted location. Construction of the Metrolink Project will impact the Department of Water Resources' (DWR) ability to operate and maintain the Santa Ana Pipeline (SAPL). The SAPL is a critical segment of the California State Water Project and is in continuous operation throughout the year to meet the demands of the Metropolitan Water District of Southern California. Any inadvertent damage to the SAPL during the Metrolink Project's construction activities could result in catastrophic failure jeopardizing the safety of construction crews and the general public. To prevent these possible damages, prior to any construction activities upon DWR's easement, the SAPL must be shut down and dewatered for safety reasons. Historical demand levels for water deliveries from the SAPL throughout the year allow shutdowns to occur only during the months of November and December and cannot exceed 31 days. On June 23, 2008, the Public Works Department received and reviewed a request from DWR for an encroachment permit authorizing construction work that will encase approximately four hundred fifty one (45 1) feet of the SAPL in concrete to protect the pipe from additional loads and minimize the need for future maintenance activities by DWR within the Metrolink Project area. This project