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carried in the Denver-Hudson canal through Bootleg and Horsecreek reservoirs to Prospect Reservoir. The Prospect lateral transports water on to Olds Reservoir. One of the purposes of the Olds Reservoir study was to compare actual field measurements of water-level changes with theoretically predicted water level changes. Thirty two observation wells were used to monitor water- table fluctuations at the recharge site. For five months the reservoir was kept at capacity, and an average infiltration rate (neglecting evaporation) of 1.2 feet per day was calculated. A groundwater mound was detected uSing the observation well network. This mound was compared to a mound which could be theoretically described by the analytical solution of Blttenger and Tralease (1960). The field measurements agreed with the theoretical description. It was also concluded that the Theis non-equilibrium equation was an accurate solution to the recharge problem for this case. 2.1.2 South Platte Ditch Demonstration Recharge Project This recharge project was started in 1974 along the Sand Hill Ditch which is a leaky abandoned lateral of the South Platte Ditch located between Brush and Sterling and about two miles south of the South Platte River. The 'recharge operations were conduoted in the ditch and several natural ponds. Recharge was conducted mainly in the spring and fall when excess water was available in the South Platte River. The capacity of the Sand Hill ditch was about 20 cfs and that of the ponds was about 59 ac-ft. There were 3 gaging stations in the ditch to monitor the amount of recharge, 32 observation wells and 31 irrigation and 'stock wells which were used to measure water table fluctuations in the area. The Colorado Division of Water Resources, Colorado State University, South Platte Ditch Company, and Groundwater Appropriators of the South 8