AWWA ACE63099

This slide presentation outlines the impacts of valve location and reliability on distribution system operation. Project objectives were to: develop a rationale for valve location to enhance system reliability; develop a software tool for analysis of valve importance for efficient pipe segment isolation; assist water utilities in minimizing customer impacts from pipe failures during repair of pipes; and, develop a Strategic "Valving" Methodology to provide guidance for efficient management of valves. Topics outlined include: system-wide rules; Functional Requirements in Case of Water Main Break; Valve Reliability; Example Network Showing Valve Locations; Simple Hypothetical Pipe Network; Three Levels of Analysis; Tier 1 Performance Indicators; data requirements; Strategic Valve Management Model Software Requirements; hypothetical water main network; Hypothetical Network Valve Prioritization; Direct Customers Affected by Average Water Main Break for a Water Distribution System Direct Customers Affected by Average; stages of operation; improvement in valve operability; annual cost for valve O&M; Capital Costs of Valves (New Construction and Replacement); Alternate Strategies for Reducing Out-of- Service Customers; Chester Water Authority ¿¿¿¿¿¿¿¿ Statistics New Garden Section; System Characteristics for Four Scenarios; Performance Indicators for CWA under Four Scenarios; Segments Having Largest Number of Pipes in the CWA Network; Segments Having Largest Number of Pipes in Unintended Isolations; Segments Having Maximum Number of Customers from Segments and Unintended Isolations; Most Critical Valves in CWA System in Terms of Affected Customers; Methodology for Application of SVMM; and, suggested rules for valve addition. Includes tables, figures.