LOCATION.--Lat 40°23'56.0", long 95°39'12.0"
  referenced to North American Datum of 1983, in NW 1/4 NE 1/4 SE 1/4
  sec.18, T.8 N., R.16 E., Nemaha County, NE, Hydrologic Unit 10240005,
  on right bank 10 ft downstream from bridge on U.S. Highway 136 in
  Brownville, 2.3 mi downstream from Honey Creek, 7.3 mi upstream from
  the Little Nemaha River, and 535.3 mi upstream from mouth. (map)
  GAGE.--Water-stage recorder. Datum of gage is
  859.95 ft above North American Vertical Datum of 1988. Prior to
  August 1, 2016, datum of gage was 860.00 ft above National Geodetic
  Vertical Datum of 1929.
REMARKS.--Flow regulated by
  upstream main-stem reservoirs. Fort Randall Dam was completed in July
  1952, with storage beginning in December 1952. Gavins Point Dam was
  completed in July 1955, with storage beginning in December 1955.