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(2) Franktown-Parker watershed project - upper Cherry Creek basin. Eighteen small dams constructed by the Soil Conservation Service in the Franktown-Parker area of upper Cherry Creek basin reduced flood flows upstream of the Cherry Creek Dam. Of three structures filled during the flood, two were overtopped and sustained erosion damage, but the third structure functioned satisfactorily. The remaining 15 structures were outside the area of high intensity rainfall and received only moderate runoff. Benefits attributable to the system include reduction of damages to county roads, land and buildings, and irrigation systems. These benefits are estimated at $150,000. (3) West Cherry Creek watershed project. The West Cherry Creek watershed contains 16 floodwater 'retarding 'structures. The project area was on the fringe of the storm rainfall, with rainfall values of 1 inch and less. The Soil Conservation Service's report did not attribute any flood damage prevention to this watershed project. i' i ; . , , , d. Non-Federal flood control improvements. (1) The capacity of the, improved channel of the South Platte River at "Denver was greatly exceeded by the flood discharge on 16 June, consequently, no flood damage prevention was assigned to these improve- ments. ' (2) The privately constructed agricultural levee system on the South Platte River immediately downstream of Denver was overtopped and flanked by the June floods and was unable to prevent flooding from the lesser floods of July and August. Consequently, no prevention of flood damages was credited to these improvements. V. DISASTER PREPARATION AND ACTION (~ .. 22. ACTION BY THE CORPS OF ENGINEERS ~ a. Pre-flood and post-flood operations performed by the Corps of Engineers were undertaken in compliance with the authority provided in Public Law 99, 84th Congress. Operations under this authority included pre-flood surveillance of developing storm and runoff conditions; reconnaissance and surveillance of flooding, flood crest movements, flood damages; cooperative activities with other Federal, State, and local agencies, and certain clean-up and restoration of flood-damaged public facilities. A major aspect of Corps of Engineers activities involved cooperative operations with the Office of Emergency Planning in compiling estimates of flood damages and cost estimates for certain aspects of post-flood recovery work performed by local government under the provisions of Public Law 875. ' b. The Corps of Engineers Resident Engineer in Denver began surveillance of the storm and flood conditions on 14 June 1965 when 14