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As part of their Water Use Efficiency Program, the City is committed to accurately metering and billing for water used by customers. Service meters normally have a life of approximately 10 to 20 years. The existing service meters were mostly installed during the 1992 project. Consequently, they are near the end of their expected life. The amount budgeted should allow for the City to replace approximately 120 meters annually. PROJECT O&M-2: FINISHED WATER METER Schedule: 2016 Estimated Cost: $7,100 The City has experienced decreased demand during the winter, resulting in flows outside of the ideal flow range for the 12-inch finished water meter. The City plans to replace the existing meter with a smaller mag-meter to increase meter accuracy. PROJECT O&M-6: TURBIDIMETER REPLACEMENT Schedule: 2016 Estimated Cost: $25,000 By 2018 the treatment plant will have been online for 20 years, which is the typical life span of turbidimeters. As a result the City plans to replace three turbidimeters with newer models. PROJECT O&M-9: CLEAN INTAKE POND Schedule: 2019 Estimated Cost: $71,300 The City plans to clean and rehabilitate the intake pond in Domerie Creek within the 20-year planning period to ensure adequate storage and withdrawal capacity. 6-YEAR CAPITAL IMPROVEMENT PLAN Table 1 summarizes the proposed capital improvement projects for the 6-year planning period. Each project is discussed further in the paragraphs above. Detailed cost estimates for the capital improvement projects are included in Appendix K. The transmission and distribution system project costs in Table 1 include 20 percent contingency and 25 percent engineering and administration. O&M costs include 20 percent contingency and 10 percent engineering and administration unless otherwise noted. Project costs are projected forward with 3 percent inflation annually as well. WASTEWATER (SEWER) SYSTEM PLAN The original sewer system for the City of Roslyn was constructed in the early 1900s as a combined storm and sewer system with direct discharges to Crystal Creek. Currently, the sewer system serves approximately 754 customers. In 1973, the City constructed a two-cell facultative lagoon system and constructed a sewer trunk line to Roslyn. Around this time sewer collections systems were expanded to include low lying areas in the southeast portions of town. In 1984, the City replaced much of the system, including side sewers, in the northwest portion of the City. In 1988, the City completed sewer improvements intended to decrease inflow and infiltration problems at select locations in the central portion of the City. In 1989, an eight-inch PVC sewer main was extended from 3rd Avenue along alleys between Montana Avenue and West Oregon Avenue. In addition, the main trunk line was extended at the wastewater treatment plan with sixteen-inch ductile iron pipe and twenty-one-inch concrete pipe as part of wastewater treatment plant improvements. A sewer project was completed in 2004 at East June 15, 2016