USGS Water-Year Summary 2021
05482430 North Raccoon River near Lanesboro, IA
LOCATION - Lat 42°10'08.7", long 94°43'33.7" referenced to North American Datum of 1983, in SW 1/4 SW 1/4 NW 1/4 sec.17, T.85 N., R.33 W., Carroll County, IA, Hydrologic Unit 07100006, on left bank 15 ft downstream from bridge on State Highway 286, 1.5 mi southeast of Lanesboro, 1.5 mi downstream from Elk Run, 0.5 mi upstream from Morrowbone Creek, 98.5 mi upstream from mouth, and 129 mi upstream from mouth of Raccoon River.
DRAINAGE AREA - 1,238 mi².
PERIOD OF RECORD - Stage-only records from March 2009 to current year (no winter records). Data from November 1 to February 28 is typically deleted due to seasonal limits.
- Water-stage recorder.
Datum of gage is 1,056.091 ft. above NGVD of 1929 and 1,056.363 ft. above NAVD of 1988. The NAVD 1988 datum of gage was determined from a GNSS Level II, Rapid Static survey of RM2 (Reference Frame NAD_83(2011) (EPOCH:2010.000), GEOID18), completed by USGS personnel on June 24, 2021. The NGVD 1929 datum of gage was determined by the NGS VERTCON program (v2.1) executed on February 24, 2022. The VERTCON offset of -0.16 ft. was validated with and assurance check on nearby NGS BM NL0172.