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Figure 3.4 - Pipe Diameter, Length and Material within ELCO Transmission & Distribution System 1 250,000 :e. 200,000 ~ ~ 150,000 .5 Q) 100,000 Q. it '0 50,000 J: ... C) j 0 ~ N ~ "t"""" "t"""" "t"""" N M ~ ~ ~ 0 N ~ "t"""" "t"""" "t"""" ~ ~ ~ Pipe Diameter (inches) . PVC (580/0) m AC (320/0) E;:3 DIP (80/0) ~ Cast Iron (<10/0) [Il Steel (10/0) District records indicate the average daily demand during 2006 was 3.8 million gallons per day (mgd). The peak daily demand in 2006 was 7.4 mgd and occurred on July 16th. Sources of Water Supply Colorado-Bia Thomoson (C-BTJ Water In 1962, when ELCO and other water districts in northern Colorado were created, most of water rights in the region's rivers and reservoirs had already been claimed. That water had been claimed in the 1860's and 1870's by irrigators and mutual ditch companies. The only reliable and affordable source of water available to ELCO when it was created was from the Colorado-Big Thompson (C-BT) Project. C-BT facilities divert water from the western slope of Colorado to the Front Range to supplement the region's native water supply. It is the largest transmountain water diversion project in Colorado. It was constructed by the Bureau of Reclamation between 1938 and 1957 and imports an average of 213,000 acre feet of water each year to northeastern Colorado for agricultural, municipal and industrial uses. C-BT Project facilities that serve multiple beneficiaries are still owned by the Bureau of Reclamation. Operation and management is performed under contract by the Northern Colorado Water Conservancy District (NCWCD). In 1963, C-BT water could be purchased for $100 per unit from farmers that felt they had more water than they could use. The current market price is approximately $9,000 per unit. Figure 3.5 shows how the price of C-BT units has varied from 1963 to 2006. Clear Water Solutions, Inc. East Larimer County Water District 2007 Water Conservation Plan 11