Arkansas - Round Mountain Water System Improvement Project_Full Application

Home Browse Search

Round Mountain Water and Sanitation District (RMWSD) Water System Improvements Project ATTACHMENT C ( continued) . Require digital and vellum hard copy as-builts for all new main and appurtenance installations. The RMWSD engineer should maintain a digital file of all infrastructure and as-built information. . A fire hydrant conforming to the National Fire Protection Association Standards and the local Fire District Standards; connected to a 6 inch or larger main should be provided at every street intersection, or at 500 foot spacing. . Shut-off valves should be provided every block, or at BOO-foot intervals in areas without block structures. WATER RIGHTS & AVAILABLE TAPS . Do not place wells closer than 1000 feet apart to minimize expected cone of depression effects. . Work to achieve a high percentage of return-flow credits for all water sources. The current "Special Rules" do not appear to provide adequate return flow credits, thus limiting potential tap capacity. This issue should be explored by the Districts water engineer and water attorney. WATER STORAGE . An ISO Audit should be requested by the Towns and Fire District to clarify the necessary fire flow requirements for the distribution system, and fire flow storage capacity requirements. . Adopt a requirement for fire sprinklers in any building with a fire flow requirement exceeding 3000 gpm in Town Fire Codes to minimize excessive storage requirements to the District. . Consider adding a minimum of 500,000 gallons of storage to meet fire flow demand and increase domestic storage for future growth. . Consider a new storage tank location east of Silver Cliff to serve Zone 3 or adding a pump station with power backup and the necessary pump capacity to meet fire flow requirements. . A map showing potential potable water storage tank locations to serve Zone 3 is provided in Appendix B. WATER TREATMENT . Either obtain a waiver for contact time from the CDPHE or add contact chambers to achieve the required contact time at each treatment site. . Develop a long-term plan to pump treated water to storage rather directly into the mains to improve chlorine contact time and chlorine storage residuals. SYSTEM INSTRUMENTATION & CONTROL . An automated control system with data logging of pump cycles and tank levels should be purchased and installed. . The system should maintain tank levels at set points by automatically activating well pumps in the priority or rotation programmed. . The approximate cost of a base system using radio-linked telemetry is $15,000.00 - 20,000.00. This improvement should be implemented as soon as possible to improve system reliability. 5c