RES 2025036 - Laserfiche WebLink

Element 8 – System Evaluation, Capacity Assurance, and Capital Improvements City of Pleasanton Sewer System Management Plan, July 2025 29 8.0: Element 8 – System Evaluation, Capacity Assurance, and Capital Improvements The Plan must include procedures and activities for: a. Routine evaluation and assessment of system conditions. b. Capacity assessment and design criteria. c. Prioritization of corrective actions. d. A capital improvement plan. 8.1: Long-Term Capital Improvement Plan The purpose of the City’s long-term capital improvement plan (CIP) is to ensure sustainability of the sewer system’s infrastructure and determine funding needs. The long-term CIP is a living plan that is reviewed on a 2-year cycle to evaluate implementation progress and updated on a 6-year cycle to reflect any changes in drivers and needs. Development of the long-term CIP is based on technical evaluations that include condition assessments and system capacity. The long-term CIP includes prioritized projects with cost estimates over a 20-year span. The long-term CIP is developed in coordination with Utilities Division O&M staff and Engineering Division staff. The City’s Engineering Division is responsible for implementing CIP projects. Engineering will utilize the long-term CIP as a guide for developing its 5-Year CIP budget that is updated every 2 years. At the time of this SSMP Update, the City’s initial long-term CIP is in the process of being prepared by Woodard & Curran and will be completed by the date shown in Section 1.2. 8.2: Condition Assessments 8.2.1: Gravity Mains As discussed in Section 4, the City performs CCTV inspections of its gravity mains up to 15 inches in diameter. As part of the condition assessment process, this inspection data is evaluated for the purposes of identifying CIP projects. The latest evaluation was completed in November 2024 by Woodard & Curran for pipes inspected and coded through June 2024. In total, 424,370 linear feet (or about 30 percent of the City-owned pipes in the gravity collection system) had CCTV data and defect scoring that could be utilized for a risk based assessment. InfoAsset Planner risk assessment software was used to develop likelihood of failure (LOF) and consequence of failure (COF) scores for each pipe in the system. LOF scoring was based on structural condition based on CCTV data, a “structural vulnerability” factor reflecting the age and material of the pipe (also used as a preliminary surrogate for structural condition for pipes without CCTV data), and frequency of required cleaning (“hot spots”). COF scoring considered the pipe size (reflecting its potential flow volume), environmental consequence