Surface Water
The flow in the Upper Arkansas River is influenced by the operations of an interstate compact between Colorado and Kansas. Under the compact, some surface water inflows are stored in John Martin Reservoir, located approximately 90 miles west of the Stateline, near Lamar, Colorado for use in Kansas. Water releases are coordinated with Kansas Department of Agriculture-Division of Water Resources and the Associated Ditches. There are six United States Geological Survey streamflow gage sites along the Upper Arkansas River including Coolidge, Syracuse, Kendall, Deerfield, Garden City and Dodge City.
The average annual streamflow at Syracuse was 286.2 cfs, Coolidge was 155.04 cfs, Deerfield was 129.36 cfs, Kendall was 104.35 cfs, Garden City was 174.22 cfs and Dodge City was 128.45 cfs.
