USGS Water-Year Summary 2024
02231000 ST. MARYS RIVER NEAR MACCLENNY, FL
LOCATION - Lat 30°21'31", long 82°04'54" referenced to North American Datum of 1927, in NW 1/4 sec.02, T.2 S., R.22 E., Baker County, FL, Hydrologic Unit 03070204, on right bank 200 ft downstream from site of former Stokes Bridge, 1 mi downstream from confluence of North and South Prongs, 6 mi northeast of Macclenny, and 100 mi upstream from mouth.
DRAINAGE AREA - 700 mi². approximately, includes part of watershed in Okefenokee Swamp, which is indeterminate.
REVISIONS HISTORY - WSP 1082: 1928(M), 1945(M). WSP 1142: 1928, 1945. WSP 1434: 1927. WSP 1905: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 1923 to June 1923 (discharge measurements only), October 1926 to current year.
GAGE - Water-stage recorder and data-collection platform. Datum of gage is 40.00 ft above NGVD of 1929 (levels by Mees and Mees) and 39.06 ft above NAVD of 1988. Prior to Feb. 21, 1939, nonrecording gage and Feb. 21, 1939 to Aug. 15, 1948, water-stage recorder, at site of former bridge 200 ft upstream, at same datum.
COOPERATION - This gage is monitored in cooperation with the St. Johns River Water Management District and the USGS - Federal Priority Streamgages.