USGS Water-Year Summary 2019
03357330 BIG WALNUT CREEK NEAR ROACHDALE, IN
LOCATION - Lat 39°48'58", long 86°45'12" referenced to North American Datum of 1927, in SE 1/4 NW 1/4 sec.21, T.16 N., R.3 W., Putnam County, IN, Hydrologic Unit 05120203, on right upstream bank at County Road 1100S bridge, 3.4 mi southeast of Roachdale, 9.06 mi upstream from confluence with Plum Creek, and at mile 39.16.
DRAINAGE AREA - 131 mi². drainage area derived from the "Drainage Areas of Indiana Streams" publication
PERIOD OF RECORD - October 2001 to current year.
GAGE - Water-stage recorder. Datum of gage is 779.04 feet above the North American Vertical Datum of 1988. Formerly 800 ft above National Geodetic Vertical Datum of 1929, from topographic map.