MW hydroelectric plant generates electricity for the Solano Irrigation District, which owns and operates the dam. The Putah Diversion Dam, or PDD, also constructed in 1957, diverts water into Putah South Canal about downstream of Monticello Dam. The dam is a gated concrete weir structure with an earth-fill embankment wing. It creates the small Lake Solano, which has a capacity of only . The canal is entirely concrete-lined except for a mile (1.6 km) of pipe called the Putah South Pipeline. Most of the lands are below the level of the canal and are served by gravity. Lands above pump water straight from the canal. The canal ends at Terminal Dam, which is made from earth-fill. The dam forms a small reservoir called Solano Lake. This reservoir supplies drinking water to the city of Vallejo. Most of the canal is operated by Solano Irrigation District, including its headworks. Ecology Steelhead trout (coastal rainbow trout) (Oncorhynchus mykiss irideus) and Chinook salmon (Oncorhynchus tshawytscha) continue to survive in Putah Creek. Although these anadromous salmonids cannot pass the Putah Diversion Dam, stream resident rainbow trout (the landlocked form of steelhead trout) continue to thrive above Monticello Dam in the upper headwaters and grow to large size in the first few miles directly below the dam. The ecological centerpiece of the 2000 Putah Creek Accord mandated flow releases from the Putah Diversion Dam intended to secure spawning and rearing flows for spring-spawning native fishes with a natural flow regime of higher winter and spring flows, with lower summer and fall flows, but mandated sufficient perennial flow to support rearing salmonids. The Accord mandated a short three-day pulse to occur between 15 February and 31 March to initiate spawning behavior, followed by a month-long release of elevated flows. Further, the Accord established a schedule of monthly baseline flows designed to maintain continuous lotic (flowing) conditions year-round from the PDD to the Yolo Bypass. In December 2014, the California Fish and Game Commission designated Putah Creek a "Wild Trout Water" and efforts by citizen groups to restore the creek resulted in increased Chinook salmon rearing in the lower watershed. The natural flow regimes simulated by releases from the dams has restored native fishes while suppressing non-native fishes, the latter best adapted to warmer water and stagnant conditions. By increasing releases briefly in winter/spring and allowing much lower flows in late summer/fall, there has been little impact