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. . w lJl Z W (L x w ~ z w :i: Z cr . -.? ~ " Q w o :J o o cr (L w cr .. (':) r::) ~ c...., ~ 00 Corps of Engineers Revised July 1984 ARKANSAS RIVER BASIN ABOVE KEYSTONE DAM 9, Winfield Local Protection Modification, KS STATUS: This project was authorized in 1965 and a Phase I General Design Memorandum (GDM) was completed in January 1976. The GDM recommended suspension of preconstruction planning studies because the benefit-to-cost was less than unity. Accordingly, the project was placed on "inactive" status on 18 January 1977. Estimated benefits in the GDM were based on regulated flows anticipated with three upstream Corps projects (El Dorado, Towanda, and Douglass) and the upstream Soil Conservation Service system of structures in place. Recent planning efforts have shown that Towanda Lake is not justified. Also, it is unlikely that Douglass will be constructed in the near future. Without these reservoir projects, flooding of Winfield would be increased, thus increasing flood control benefits which would accrue to the Winfield project. New studies based on the change in assumed flow conditions, basic data update, and current study criteria could show a favorable benefit-to-cost ratio. By letter dated 31 January 1980, and in a visit to Tulsa District on 14 April, the City Manager of Winfield requested the Corps to reactivate planning studies. As a result of those visits, approval was obtained on 24 May 1982 to transfer the project from the "inactive" status to the "deferred" status. The city is actively pursuing funds to upgrade their levee. DESCRIPTION: The authorized plan consists of raising most of the existing levee which is 14,500 feet long, to provide 1 foot of freeboard above the standard project flood modified by upstream reservoirs. Also the levee would be extended about 950 feet along Timber Creek on the north and about 7,600 feet along the Walnut River on the south. The levee would have a crown width of 10 feet and side slopes of 1 foot vertical to 3 feet horizontal. Interior drainage would be provided by a 72-inch gated pipe and by a ponding area. SPONSOR: City of Winfield, KS. 29, Arkansas River from Great Bend, KS, to John Martin Dam, CO STATUS: The current efforts are being directed toward investigating non-structural and structural solutions to flood problems at communities along the main stem Arkansas River. Also, water supply studies at Lamar, Colorado and multipurpose channelization studies for the Arkansas River are underway as is a hydropower study at John Martin Reservoir. The study has resulted in three completed 205 projects at Holley and Granada, Colorado, and Larned, Kansas; and a project con- struction authorization for Great Bend, Kansas. Two additional Section 205 projects have been developed at Kinsley and Wilroads Gardens, Kansas; but local interests are unable to provide satisfactory assurances. A reconnaissance study was initiated in FY82 for the main stem Arkansas River downstream of John Martin Dam, Colorado to the Colorado-Kansas State line. An economically feasible plan has not been recommended at this time, therefore, flood control studies have been discon- tinued. A hydropower study for John Martin Dam was initiated in FY 1982 and scheduled for completion in FY 1984. DESCRIPTION: The survey-scope study is investigating problems and needs of the basin to determine the economic, engineering, and environmental feasibility of water resource development. The study scope includes determination of the feasibility of flood control measures hydropower irrigatio~, municipal and industrial water supply, fish 'and wildlif~ conservatlon, and enhancement, and recreation. SPONSOR: Great Bend Local Protection sponsor the city of Great Bend. Lamar County Water Supply sponsor the city of Lamar. 6 c