USGS Water-Year Summary 2017
07065495 JACKS FORK AT ALLEY SPRING, MO
LOCATION - Lat 37°08'53.4", long 91°26'35.1" referenced to North American Datum of 1983, in SW 1/4 SW 1/4 SE 1/4 sec.25, T.29 N., R.5 W., Shannon County, MO, Hydrologic Unit 11010008, on downstream side of pier on State Highway 106 bridge, 0.5 mi upstream from Alley Spring Branch, and 5.5 mi west of Eminence.
DRAINAGE AREA - 298 mi².
PERIOD OF RECORD - Mar 1993 to current year.
GAGE - Water-stage recorder. Datum of gage is 656.74 ft above National Geodetic Vertical Datum of 1929. Prior to Oct 1, 1999, datum was 4.0 ft lower.