USGS Water-Year Summary 2024
02423414 LITTLE CAHABA RIVER AT CAHABA BEACH ROAD NEAR CAHABA HEIGHTS, AL
LOCATION - Lat 33°26'23", long 86°41'56" referenced to North American Datum of 1927, Shelby County, AL, Hydrologic Unit 03150202, on right bank, 1.3 mi from mouth, 1.5 mi southeast of Cahaba Heights, and 3.9 mi southwest of Lake Purdy dam.
DRAINAGE AREA - 47 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 2003 to current year.
GAGE - Water-stage recorder.
Datum of gage is 431.56 ft above NAVD of 1988, (Reference Frame NAD_83 (2011) (EPOCH:2010.0000) GEOID18).
Prior to March 10, 2025, the datum of gage was 450 NGVD of 1929 from Topographic Map. However, that elevation was not assigned in the MLR.