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",.;, .-,.'><"'X.;:' 32 reservoirs are Rocky Ridge, Black Hollow, Number 3, Number 4, Kluver, Curtis, Richards, Long Pond, and Lindenneir Lake. These reservoirs have a combined capacity of 26,303 acre-feet. The mountain reservoirs provide storage above the Company's headgate on the Poudre River. Rocky Ridge and Black Hollow Reservoirs provide storage and regulation facilities for the Larimer County Canal. The remainder of the plains reservoirs provide storage for utilization in the operation of the system. The Larimer County Canal is the prime conveyor of water to the users supplied by the Water Supply and Storage Company. The headgate of the canal is on the Poudre River and automatically controls the diversions from the river. The flow, or "head", of the canal can be regulated between the head- gate and Rocky Ridge reservoir by exchange of water with the Larimer and Weld Irrigation Company through the Long Pond reservoir system. Head regulation for the remainder of the canal is accomplished by Rocky Ridge and Black Hollow reservo j rs. Pierce Lateral also carries water to users served by the Company, although it is not owned by the Company. The Lateral begins at the inlet of the Larimer County Canal to Black Hollow Reservoir and continues north of Pierce to Lone Tree Creek. Larimer County canal Is about 38 miles long and Pierce Lateral is about 24 mi les long. I The transmountain diversions normally are begun as Soon as is practical in the spring. Occasionally the Poudre River will have surplus water and there will not be storage avai lable for additional water, and therefore the Colorado River transmountain diversions will not statt at an early date. More frequently diversions by Grand River Ditch will be limited in volume be- cause of insufficient storage in Long Draw Reservoir. The diversions from the Laramie River are I imited in amount each year by court decree, and by the physical water availabi lity under the priority administration. Water Supply and Storage Company and the Windsor Reservoir Company entered into an agreement to aid in interstate matters with Wyoming whereby the diver- sions of both the Skyline Ditch and the Laramie-poudre Tunnel are combined. The agreement is that 58 percent of the diversions by the two ditches from the Laramie River basin are given to the Skyl ine Ditch and 42 percent to the Tunnel. Since Water Supply and Storage Company owns the Skyline Ditch and two-thirds of the Tunnel water, it receives 86 percent of the Laramie River water and the remaining 14 percent goes to the Windsor Reservoir Company. The Cameron Pass Ditch has not been used in recent years, the yield is small for the work involved in opening the ditch. " J , As can be seen from the foregoing discussion of the system and of the exchanges, the Company's water supply is compl icated. Table IV-F summarizes in simplified form the supply by source for the period 1952 - 1961. Columns I - 3 are river headgate diversions. Column 4 is the yield of the several plains reservoirs. Column 5 is yield of Jackson ditch rights. Column 6 is a negative factor that arises in the various exchanges. Column 7 is water purchased from others. Subsequent to 1961, the amounts purchased annually have ranged considerably greater than the 750 acre feet shown. In 1963, 4820 acre feet were purchased. Column 8 is water received by the Company