Pipeline Infrastructure Renewal Project

Replace and repair deteriorated pipelines as needed for cost effectiveness. These projects will typically replace water pipelines in kind. Project Description This project involves the replacement of deteriorated pipelines in EBMUD's service area. The work includes pipeline replacement activities as well as import of construction materials and off haul of removed trench soils for disposal at EBMUD' s trench storage sites or direct hauling to a reuse site. A summary and project listing of forecasted pipeline design and construction activity are presented in the attached Tables A and B for Contra Costa County. See these tables and Figure 2 for the complete list of locations in the county. Justification The pipeline candidates are selected for replacement when it becomes more cost effective to replace them than to make frequent repairs. This will also reduce the number of costly interruptions in water delivery. Permits Encroachment permits will be obtained from the appropriate cities as required. For coordination with outside agencies, a listing of forecasted EBMUD's design and construction activities in paved streets, identified as the Fiscal Year 2026 Pipeline Work Plan, will be circulated to all agencies in EBMUD's Service Area in November 2025. The Work Plan is an annual document that outlines anticipated pipeline design and construction activities in paved streets for the current fiscal year. Schedule Projects classified as being in design are those projects that are currently in design or may be designed in FY26 (July 1, 2025 to June 30, 2026). These projects may reach construction phase as early as this fiscal year. A project listing of forecasted pipeline design activity is given in Table A. A project listing of forecasted pipeline construction activity is given in Table B. Projects classified as being in construction are those projects that have been designed and are waiting for a scheduled construction start date. EBMUD seeks to maintain a construction backlog from which projects can be selected for construction in a cost-effective manner. Many of the projects listed in the following tables will be constructed in FY26. Projects that are not built in FY26 will carry over to subsequent years in the construction backlog. Operational Impact Implementation of this project will not affect the operation of EB MUD' s water system. These projects typically replace water mains in kind (i.e., same routing, but may include nominal size increase). Construction will take place with the existing pipelines still in service. Minimal interruptions in water service will occur for short periods of time when the new pipeline is connected to the existing pipeline. Public Impact EBMUD will minimize disruptions, in particular, traffic impacts, related to the pipeline replacement. Appropriate traffic control measures will be implemented during the construction. Driveways will remain accessible, and one way traffic will only be used adjacent to excavation pits and pipe assembly areas. In order to minimize delays, at least one lane of traffic will be maintained, and two-way traffic will be maintained whenever feasible.