Station operated in cooperation with the U.S. Army Corps of Engineers and the Miami Conservancy District.
03270500 Great Miami River at Dayton, OH
LOCATION.--Lat 39°45'55", long 84°11'51", Montgomery County, OH, Hydrologic
Unit 05080002, on left bank 1,000 ft downstream from Main Street bridge in Dayton,
0.7 mi upstream from Wolf Creek, 0.8 mi downstream from Mad River, at river mile 80.
DRAINAGE AREA.--2,511 mi2.
PERIOD OF RECORD.--April to September 1905, January to September 1906, January 1907 to
December 1909 (gage heights only), April 1913 to current year. Monthly discharge only
for October 1919 to September 1921, published in WSP 1305. Gage-height records collected
at Main Street bridge since January 1892 are contained in reports of National Weather
Service. Prior to October 1962, published as Miami River at Dayton.
REVISED RECORDS.--WSP 1385: 1917. WSP 1908: Drainage area.
REMARKS.--Flood flow regulated by four retarding basins upstream from station beginning in
1920 on Mad River 6.4 mi upstream, on Stillwater River 10.5 mi upstream, on Great Miami
River 11.5 mi upstream, and on Loramie Creek 40 mi upstream. Also see REMARKS for stations
03261500, 03262000, and 03269500. Much of the flow is diverted to the Little Miami River
Basin through the Dayton waste water treatment system. Sediment data formerly collected at
EXTREMES OUTSIDE PERIOD OF RECORD.-- Flood of Mar. 26, 1913, reached a stage of 29.0 ft, site
and datum then in use; discharge, 250,000 ft3/s, computed by Miami Conservancy District.
Boating safety tips
This station managed by the Columbus Field Office.