County Butler

River Basin Walnut

Top of Dam Elevation** 1370 ft.

El Dorado Fact Sheet (pdf)
Kansas Water Office

Top of Flood Pool 1347.5 ft.
Original Storage Capacity* 249,149 acre-ft.
Capacity at Most Recent Survey* 244,139 acre-ft.
Estimated Current Capacity* 243,519 acre-ft.
Actual Sedimentation Rate* 207 acre-ft./yr
Design Sedimentation Rate** 174 acre-ft./yr
Loss of Capacity to Date* 2.26%
Top of Multipurpose Pool 796 ft.
Original Storage Capacity* 52,556 acre-ft.
Estimated Current Capacity* 38,385 acre-ft.
Actual Sedimentation Rate* 341 acre-ft./yr
Multipurpose Pool Surface Area* 4,118 acres
Average Water Depth*** 10.7 ft.
Capacity at Most Recent Survey* 43,507 acre-ft.
Loss of Capacity to Date* 29.93%
Hydraulic Residence Time*** 1 year
Watershed Sediment Yield 0.88 acre-ft/mi²/yr
Design Life for Sediment Storage 100 Years
Original Sediment Survey Year* 1981
Most Recent Survey Year* 2004

Current Federally Authorized Purposes** Flood control, fish and wildlife, water quality, water supply, recreation.
State Designated Uses*** General purposes, expected aquatic life use, domestic water supply, food procurement, irrigation water, primary contact reacreation.
Construction Began October 1, 1973
Gates Closed June, 1981
Multipurpose Pool Filled February 26, 1985
Watershed includes portions of Butler and Chase counties.
Watershed Drainage Area** 234 mi²
Major Streams Bemis, Cole, Curechen and Satchel Creeks; Walnut River
Hydrologic Unit Code 11030017030
Percent of Watershed in Organized Watershed District* 99%
Elevation of Top of Watershed** 1395 ft.

* Kansas Water Office
** Army Corps of Engineers
*** KS Dept. of Health and Environment