a gated ogee weir, wide with eighteen tainter gates, each . Spillway capacity at the maximum pool level (elevation ) is . Capacity at the top of the flood control pool level (elevation ) is . The spillway also has nine sluices, each . The power intake structure is between the spillway and the left non-overflow section of the dam. It includes two penstocks, each diameter and controlled by two gates. The power generation facility includes two hydroelectric generators, each rated at . Largest release in service In September and October 1986, Keystone Lake was filled to capacity when the remnants of Hurricane Paine entered Oklahoma and dropped nearly of water into the Cimmaron and Arkansas rivers northwest of the lake, requiring the Corps of Engineers to release water downstream at a rate of , which made downstream flooding inevitable. As a result, a private levee in West Tulsa failed, causing more than $1.3 million in damages. Recreation According to the Corps of Engineers website, Keystone Lake has 16 recreational areas (including 3 alcohol-free beaches), 11 boat ramps, 4 marinas and 2 off-road vehicle areas. There are also campgrounds, a waterfowl refuge and a public hunting area. Keystone State Park nearby offers cabins. Fishing is popular, with the most plentiful species being striped bass, white bass, black bass, small mouth bass, crappie, and catfish. Fauna around the lake include: white-tailed deer, raccoon, bobcat, coyote, beaver, squirrel, cottontail rabbit, quail, dove, ducks and geese. Hunting and fishing licenses are regulated by Oklahoma and Federal laws. Notes References External links Keystone Lake information, photos and videos on TravelOK.com Official travel and tourism website for the State of Oklahoma Oklahoma Digital Maps: Digital Collections of Oklahoma and Indian Territory Protected areas of Creek County, Oklahoma Protected areas of Osage County, Oklahoma Protected areas of Pawnee County, Oklahoma Reservoirs in Oklahoma Protected areas of Tulsa County, Oklahoma Infrastructure completed in 1968 Bodies of water of Tulsa County, Oklahoma Bodies of water of Creek County, Oklahoma Bodies of water of Osage County, Oklahoma Bodies of water of Pawnee County, Oklahoma 1968 establishments in Oklahoma