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OlJll12 e . e Groundwater well sites used existing, abandoned, or otherwise available wells for surface water injection. Project sites 6 and 7 received water from Murtaugh Lake, a Twin Falls Canal Company off- stream water reregulating facility for groundwater recharge. Snake River water was diverted and conveyed to the lake. Murtaugh Lake water is pumped and conveyed several miles through pressure pipeline to sites 6 and 7 for injection into wells to recharge the groundwater. Surface water is available from the lake prior to the irrigation season, during the irrigation season when canal capacity is not all being used to convey irrigation water, and after the irrigation season. Cottonwood and Dry Creeks are ephemeral streams, and during the irrigation season they are fully appropriated. Water is usually available during the spring runoff to divert for groundwater recharge. The creek flows are diverted to desilting basins and then to injection wells. Project Facilities The project facilities consisted of: Groundwater recharge Injection wells 13 Infiltration pond 1 Stream gauges 2 Continuous recorder wells 9 Monthly wells 4 Semiannual wells 9 Surface water sites 4 Groundwater sites 10 Injectate sites 11 Groundwater sites 15 Pumping plants 2 Pressure pipe Surface water monitoring Groundwater level monitoring Background water quality monitoring Water quality monitoring Murtaugh Lake pumping plants Conveyance and distribution systems The project used two types of connections between the delivery system and the well. At the Cottonwood Creek sites, a delivery line was plumbed directly into the well casing with a 90-degree elbow. At other sites, a gooseneck pipe was used to connect the delivery line and well casing. It was determined that some wells needed a drop pipe extending a significant distance down into the well. This prevented damage to uncased portions of the well and air 3