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I I I I I I I I I I I I I I I I I I I Feasibility Report for Improvement of Paonia's Water Supply System Town of Paonia April 21,2000 EXECUTIVE SUMMARY GEl Consultants, Inc. (GEl) in association with WestWater Engineering (WestWater) and BBC Research and Consulting (BBC) was retained by the Town of Paonia in 1999 to perform a feasibility report for the improvement of Paonia's water supply system. The Town's water supply system includes 14 spring collection units with a total water right of 9.9 cfs, approximately 20 miles of raw water supply pipelines, Todd Reservoir, two small water treatment plants and three treated water storage tanks. z., '{2. 5'" The 1999 population in the Town's service area was 2,285 people resulting in metered water demands of approximately 127 million gallons (390 acre-feet) per year. BBC developed a lower bound, most likely, and upper bound estimate of future water demands in the Town's service area. BBC's estimates indicate that in the year 2020 metered water demands could range from 184 to~mil1ion gallons per year. In the year 2030 the estimates range from 220 to 357 million gal\ons per year. '1S~ WestWater estimated the firm yield of the Town's water supply system at approximately 203 million gallons (623 acre-feet). This is a 2-year average based on the 1989-1990 drought event and is based on correlations between snowpack and treatment plant inflows. '< x A comparison of the average annual firm yield and 1999 plant inflows indicates that the Town currently has a tap deficit of about 100 taps and there could be severe water shortages during dry water years. Developing additional storage appears to be the key to solving the Town's water supply challenge. A summary of primary alternatives developed through the study is provided below. Alternative Cost Additional Storage Storage Unit Cost ($ million) (acre-teet) ($ per Ac:re-toot) Todd Reservoir Lining $1.25 245 $5,105 Increase Lone Cabin Storage by 1,705 acre-feet $7.3 1,705 $4,148 Increase Lone Cabin Storage by 1,000 acre-feet $5.9 1,000 $5,857 Stephens Spring Dam Site $9.7 1,189 $8,131 A fmancial analysis indicates that average tap fee increases to fund these projects would range from about $3,100 and $13,500 per tap. J:IPROJECTSI99368IReportsIFeasibility wpd GEl Consultants, Inc.