The purpose of the water distribution system study completed by EMH&T was to determine if the existing water distribution system – including main water lines and water tower capacity – is sufficient to service the future redevelopment of the Bridge Street Corridor. The model looked at the existing water distribution system and factored in the general land uses and densities proposed with the Bridge Street Corridor Vision Plan to understand whether the existing system can support the long-term redevelopment of the corridor, and if not, what improvements would be necessary.
Because the City of Dublin has made strategic improvements to the water system throughout the years with road improvements and other important development areas including the Historic District, the existing system is able to provide adequate water service and fire flow to support the build-out conditions of the Bridge Street Corridor. Any areas that have been identified as unable to provide the desired levels of service (while maintaining the minimum standards) are expected to be improved as future development occurs.
The main study conclusions are summarized below, and the full report is available here.
1. The water distribution system analysis did not identify any immediate operating issues requiring water infrastructure improvements; even after a complete build-out of the Bridge Street Corridor, peak water pressures would still be within acceptable limits.
2. Adequate fire flow (3,000 gallons per minute for commercial/mixed use development) is available to continue serving the public fire protection system.
3. A few areas were identified that would result in fire flows below the desired capacity (3,000 gallons per minute), but would still be projected to exceed the minimum fire flow standards (2,500 gallons per minute). The water distribution system in this limited area, located around Kilgour Place north of Post Road, is expected to be improved with future development of this area, with additional water mains that would result in the desired fire flow levels.
4. Total estimated water demand for the Bridge Street Corridor at build out is 2.11 million gallons per day (existing water usage is 0.6 million gallons per day).
5. Like street connectivity, it is important that the existing 12-inch water mains throughout the Bridge Street Corridor remain connected throughout any redevelopment to provide adequate water distribution and fire flow to all parts of the corridor, with additional connections being made in the limited areas identified by the analysis.
Preliminary findings from this study were presented by Shane Spencer, PE, of EMH&T at Joint Work Session #2 on May 24, 2011. Watch the video here.