USGS Water-Year Summary for Site 03270000

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	00060 Discharge(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

03270000 MAD RIVER NEAR DAYTON OH

LOCATION - Lat 39°47'50", long 84°05'19" referenced to North American Datum of 1927, Greene County, OH, Hydrologic Unit 05080001, on left bank in retarding basin 300 ft upstream from Huffman Dam, 2.3 mi downstream from Mud Run, 6.2 mi northeast of Dayton, and at mile 6.1.

DRAINAGE AREA - 635 mi².

REVISIONS HISTORY - WSP 453: 1915. WSP 743: 1929-32. WSP 1305: 1916(M), 1925(M) 1930-32(M). WSP 1908: Drainage area. WDR-OH-82-1: 1980.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1914 to current year. Monthly discharge only for some periods, published in WSP 1305.

GAGE - Water-stage recorder. Datum of gage is 776.26 ft (NAVD 1988). See WSP 1725 for history of changes prior to Jan. 21, 1959. Jan. 21, 1959 to Dec. 14, 1967, at site 900 ft downstream at datum 700.05 ft (NGVD 1929). Dec. 15, 1967 to Sept. 30, 2013 at current site at datum 777.06 ft (NGVD 1929).

COOPERATION - Base data furnished by Miami Conservancy District.

REMARKS -

Discharge records fair for 2014 except for estimated records, which are poor. Oct. 1, 2014 to Dec. 8, 2014: discharge records fair. Dec. 9, 2014 to Mar. 15, 2015: discharge records fair except for estimated records, which are poor. Mar. 16, 2015 to Apr. 28, 2015: discharge records good. Apr. 29, 2015 to Aug. 19, 2015: discharge records fair except for estimated records, which are poor. Aug. 20, 2015 to Oct. 6, 2015: discharge records fair. Oct. 7, 2015 to Aug. 2, 2016: discharge records fair. Aug. 3, 2016 to Nov. 3, 2016: discharge records good. For the period Nov. 4, 2016 to Nov. 2, 2017, discharge records rated fair except for estimated discharges which are poor. Nov. 3, 2017 to Oct. 22, 2018: discharge records fair except for estimated records, which are poor.

Record quality ratings may not be included in the water-year summary for approved records newer than 09/30/2018. Record quality is still being rated internally. For questions about record quality ratings, please send email to gs-w-oh_NWISWeb_Data_Inquiries@usgs.gov.

Flood flow regulated by Huffman retarding basin beginning in 1921, some regulation by C. J. Brown Reservoir 26 mi upstream on Buck Creek beginning in 1974. Stage affected by backwater from Huffman Dam. Water quality data was formerly collected on left bank 900 ft downstream.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Mar. 25, 1913, reached a stage of 14.0 ft, original site and datum; discharge 75,700 ft³/s, computed by Miami Conservancy District.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 21,200 ft³/s Jan. 22, 1959 (based on Huffman retarding basin outflow records); maximum gage height, 87.9 ft Feb. 26, 1929, at site and datum then in use; minimum daily discharge, 94 ft³/s Aug. 6, 1934, but may have been less during 1921-1924.