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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
16294100 Waiahole Stream above Kamehameha Highway, Oahu, HI
LOCATION - Lat 21°28'55.3", long 157°50'45.2" referenced to North American Datum of 1983, Honolulu County, HI, Hydrologic Unit 20060000, on left bank 300 ft upstream from Kamehameha Highway, 0.4 miles southwest of Waiahole Elementary School, and 1.8 miles northwest of Kahaluu Elementary School.
DRAINAGE AREA - 3.81 mi². from automated delineation using 10-meter National Elevation Dataset digital elevation model data dated September 2006 and Watershed Boundary Dataset dated May 2008, using UTM Zone 4 projection, NAD 83 horizontal datum.
REVISIONS HISTORY - WDR HI-12-1: Drainage Area. WDR-HI-13-1: 2002-2011 (P). Gage height and discharge unit value on April 21, 2023 (0622) was revised on July 22, 2024.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Miscellaneous streamflow measurements 1988-1990, 1995. August 2001 to current year. Unpublished record from August to September 2001 available at USGS Pacific Islands Water Science Center.
GAGE - Water-stage recorder. Elevation of gage is 14 ft above mean sea level (from NGS benchmark F16).
REMARKS - Waiahole Ditch diverts ground water from tunnels upstream of station. Beginning early December 1994, Waiahole Ditch began releasing water into Waiahole Stream.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 11,600 ft³/s June 4, 2011, gage height, 16.35 ft; minimum daily discharge, 13 ft³/s, October 24, 2008 and December 9, 2012.
