Part 1 - City of Bonney Lake

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CHAPTER 2 Table 2-5 Pressure Reducing Valves Pressure Reducing Valve Upper Pressure Zone Lower Pressure Zone South Tapps Drive 810 ft. 748 ft. Sumner Tapps 810 ft. 748 ft. Bonney Lake Boulevard 810 ft. 748 ft. 166th 810 ft. 630 ft. 47th 810 ft. 625 ft. Spiraea Glen 800 ft. 748 ft. Cedar View 800 ft. 748 ft. Forest Canyon 1 748 ft. 650 ft. Angeline Road North 748 ft. 620 ft. Angeline Road South 748 ft. 620 ft. Panarama Heights 748 ft. 620 ft. Rhodes Lake Road 620 ft. 465 ft. Creekridge Glen 565 ft. 465 ft. Panorama West 1 565 ft. 465 ft. Panorama West 2 465 ft. 385 ft. Panorama West 3 465 ft. 385 ft. Panorama West 4 385 ft. 310 ft. Panorama West 5 385 ft. 310 ft. Sky Island 1 748 ft. 660 ft. Sky Island 2 748 ft. 660 ft. Sky Island 3 660 ft. 465 ft. Pressure Relief Valves Pressure relief valves are installed to relieve inadvertent high pressures in a water system that may result one some component of the system fails. Such failures include pumps not shutting off when required, pressure reducing valves failing in the open position, and system valves being closed incorrectly. Pressure relief valves can either vent high pressure water to the atmosphere or can redirect water from a higher pressure zone into a lower pressure zone. The operation of this type of valve is typically triggered by an increase in water pressure past a predetermined Cedar View Pressure Relief Station setting. The City has pressure relief valves at each of its booster pump stations. J:\Data\BON\507-036\Plan\WCPChapter2.DOC 2-22 CITY OF BONNEY LAKE COMPREHENSIVE WATER SYSTEM PLAN
Water System Description Treatment Facilities Currently, the City’s drinking water supplies undergo three forms of water quality treatment: disinfection, pH adjustment, and filtration. Disinfection The City operates and maintains chlorination facilities at each of its sources of supply. The City maintains an approximate chlorine concentration of 0.2 ppm throughout the system. In the past the City utilized gaseous chlorine as its primary method for disinfection. Staring in 2000, with the construction of the Tacoma Point treatment facility, the City began replacing its gas chlorinators with less hazardous methods of chlorination. The Tacoma Point wells are currently disinfected via a liquid bleach (sodium hypochlorite – NaOCl) system. When the Ball Park treatment facility and the Grainger Springs and Victor Falls treatment projects were completed in the spring of 2005, both the City’s spring sources and the Ball Park wells were converted to onsite chlorine generation systems. In addition, a CT (chlorine Contact Time) of 6 is now maintained at both the Grainger Springs and Victor Falls sources. pH Control Corrosion control studies have indicated that the City’s Tacoma Point wells and Grainger Springs sources are both slightly corrosive. Therefore, the City currently operates and maintains a pH control facility (caustic soda - NaOH) at its Tacoma Point Wellfield. A second pH control facility was constructed at the Grainger Spring source and became operational in 2005. Grainger Springs Onsite Chlorine Generator Tacoma Point Caustic Soda Tank CITY OF BONNEY LAKE COMPREHENSIVE WATER SYSTEM PLAN 2-23 J:\DATA\BON\507-036\PLAN\WCPCHAPTER2.DOC
Page 1 and 2: City of Bonney Lake Comprehensive W
Page 3 and 4: Certification City of Bonney Lake C
Page 11 and 12: Executive Summary EXECUTIVE SUMMARY
Page 13 and 14: Executive Summary in the Bonney Lak
Page 15 and 16: Executive Summary WATER SYSTEM EVAL
Page 17 and 18: Executive Summary SUMMARY OF MAJOR
Page 19 and 20: C H A P T E R 1 Table 1-1 Water Sys
Page 21 and 22: C H A P T E R 1 To identify water s
Page 23 and 24: C H A P T E R 1 Maximum Contaminant
Page 25 and 26: C H A P T E R 1 Table 1-3 Abbreviat
Page 27 and 28: C H A P T E R 2 WATER SYSTEM DESCRI
Page 29 and 30: Water System Description Topography
Page 31 and 32: Water System Description Table 2-1
Page 33 and 34: Water System Description Currently,
Page 35 and 36: Water System Description In 1995, t
Page 37 and 38: Water System Description Well No. 4
Page 39 and 40: Water System Description Storage Fa
Page 41 and 42: Water System Description The distri
Page 45 and 46: Water System Description Forest Can
Page 47: Water System Description Pressure R

Part 1 - City of Bonney Lake

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