USGS Water-Year Summary 2020
01366400 RONDOUT RESERVOIR AT LACKAWACK, NY
LOCATION - Lat 41°47'57", long 74°25'48" referenced to North American Datum of 1927, Ulster County, NY, Hydrologic Unit 02020007, at release chamber at Merriman Dam on Rondout Creek, 1.1 mi upstream from Brandy Brook, and 1.3 mi northwest of Lackawack.
DRAINAGE AREA - 95.4 mi².
PERIOD OF RECORD - May 1951 to September 2013 (month-end elevations, contents, and diversions). October 2013 to current year (daily observation elevations).
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by Board of Water Supply, City of New York).
COOPERATION - Elevation record and capacity table provided by New York City Department of Environmental Protection.
EXTREMES FOR PERIOD OF RECORD - Maximum contents observed, 54,346 mil gal, Apr. 3, 2005, elevation, 842.77 ft; minimum contents observed (after initial filling), 8,335 mil gal, Oct. 15, 1957, elevation, 748.75 ft.