USGS Water-Year Summary 2024

07177650 FLAT ROCK CREEK AT CINCINNATI AVENUE AT TULSA, OK.

LOCATION - Lat 36°12'55", long 95°59'42" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.14, T.20 N., R.12 E., Tulsa County, OK, Hydrologic Unit 11070107, near right upstream abutment of Cincinnati Avenue bridge, 0.5 mi north of Cincinnati Avenue-36th Street North intersection, 2.0 mi south of Turley, and at mile 5.6.

DRAINAGE AREA - 8.11 mi². From automated delineation using 10-meter National Elevation Dataset digital elevation model data dated 10/01/2006 and Watershed Boundary Dataset dated 10/01/2006, using Albers Equal-Area Projection, North American Datum 1983.

REVISIONS HISTORY - WDR 2012: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - December 1987 to current year.

GAGE - Water-stage recorder. U.S. Geological Survey satellite telemeter at station. Datum of gage is 615.84 feet above NAVD 88. Current datum was determined by a GNSS Level II RTN survey Check in/Check out completed on NGS PID GG0969 with +.04/-.03 difference. Benchmark check in made on NGS PID DN4405 (+.09 difference) and DN4406 (-.09 difference) and tied to RM-9. Prior to 10/01/2021 datum in use was 615.56 feet above NGVD 1929. 

REMARKS -

Quality of data for all periods can be obtained by contacting the Oklahoma-Texas Water Science Center.

Estimated periods are considered poor unless noted otherwise. 

EXTREMES FOR PERIOD OF RECORD - Zero flow has been recorded at times throughout the period of record. The period of record maximum peak stage value of 16.50 was derived from a high water mark.