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USGS Water-Year Summary 2024
02086500 FLAT RIVER AT DAM NEAR BAHAMA, NC
LOCATION - Lat 36°08'55", long 78°49'44" referenced to North American Datum of 1983, Durham County, NC, Hydrologic Unit 03020201, on right bank 900 ft downstream from Durham municipal dam, 3 mi southeast of Bahama, and 5 mi upstream from confluence with Eno River.
DRAINAGE AREA - 168 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - September 1927 to September 1959, August 1961 to September 1966, October 1982 to September 1990, October 1992 to September 1993, October 2000 to current year.
GAGE - Water-stage recorder. The datum of the gage is 255.7 ft above NAVD88 NAD83(2011) Geoid 18 with an uncertainty of 0.5 ft. The datum was determined from two separate static GNSS observations over TBM-1 on September 19, 2019 and October 3, 2019. The difference between the two observations was 0.39 ft. Higher accuracy GNSS is not able to be maintained due to obstructions present at the site.
Datum was previously reported as 256.60 ft above NGVD29. This datum was provided by the USACE. Prior to November 19, 1927, datum of gage was 1.30 ft higher. Satellite telemetry at station.
REMARKS - Flow regulated by Lake Michie (station 02086490). No flow occurs at times most years.
Gage-height records are generally good. Discharge records are generally fair except for estimated discharges, which are poor. Additional details on the accuracy of the records can be obtained by contacting the USGS South Atlantic Water Science Center at gs-w-nc_nwisweb_data_inquiries@usgs.gov.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of September 6, 1996, reached a stage of 23.48 ft, present datum, from floodmarks; discharge, 20,900 ft³/s.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge 19,700 ft3/s, July 26, 1938; Maximum gage height 19.50 ft. Minimum daily mean discharge, no flow, September 4, 1938.
