USGS Water-Year Summary 2023
01030500 MATTAWAMKEAG RIVER NEAR MATTAWAMKEAG, ME
LOCATION - Lat 45°30'04", long 68°18'21" referenced to North American Datum of 1983, Penobscot County, ME, Hydrologic Unit 01020003, on left bank 0.6 mi downstream of Gordon Falls, 0.6 mi upstream from Mattakeunk Stream, 3.6 mi upstream from Mattawamkeag, and 4.0 mi upstream from mouth.
DRAINAGE AREA - 1,418 mi².
REVISIONS HISTORY - WSP 1501: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - DISCHARGE: October 1934 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 217 ft above National Geodetic Vertical Datum of 1929, from topographic map. Prior to Mar. 11, 1991, at site 0.5 mi upstream at datum 12.94 ft higher. Mar. 11, 1991 to May 29, 1996 at site 0.5 mi upstream at datum 10.94 ft higher.
EXTREMES OUTSIDE PERIOD OF RECORD - The flood of May 1, 1923 has been estimated as 46,600 ft³/s, based on flow for the Mattawamkeag River at Mattawamkeag (station 01031000); gage height unknown.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 29,200 ft³/s, Mar. 23, 1936, gage height, 15.34 ft, former site and datum; maximum gage height, 16.31 ft, Apr. 18, 2014; minimum discharge, 21.2 ft³/s, Sept. 27, 2020, gage height, 3.09 ft.
WATER-QUALITY RECORDS
PERIOD OF RECORD - CHEMICAL ANALYSES: Water year 1954.