USGS Water-Year Summary 2020
07375500 TANGIPAHOA RIVER AT ROBERT, LA
LOCATION - Lat 30°30'23", long 90°21'42" referenced to North American Datum of 1927, in sec.40, T.6 S., R.8 E., Tangipahoa Parish, LA, Hydrologic Unit 08070205, near left bank on downstream side of bridge on U.S. Highway 190, 1.2 mi west of Robert, 2.8 mi downstream from Chappepeela Creek, and 6.0 mi east of Hammond.
DRAINAGE AREA - 646 mi².
PERIOD OF RECORD - October 1938 to current year.
GAGE - Water-stage recorder. Datum of gage is 6.60 ft above NAVD 88. Prior to Oct. 1, 2001, datum of gage is 6.87 ft, above NGVD of 1929. Prior to Nov. 25, 1939, nonrecording gage at same site and datum.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in 1921 reached a stage of 27.1 ft, from floodmark.