LOCATION.--Lat 41°05'44", long
73°57'50" referenced to North American Datum of 1983,
Rockland County, NY, Hydrologic Unit 02030103, on right bank 20
ft downstream from CSX railroad bridge at West Nyack, 1,000 ft
upstream from State Highway 59, and 1.0 mi downstream from
DRAINAGE AREA.--30.7 mi².
PERIOD OF RECORD.--December 1958 to current year.
REVISIONS HISTORY.--WDR NY-90-1: Drainage area.
GAGE.--Water-stage recorder, stop-log control, and
crest-stage gage. Datum of gage is 53.50 ft above NGVD of 1929
(levels by Hackensack Water Co.) and 52.53 ft above NAVD of
REMARKS.--Flow regulated by DeForest Lake. Diversion
from gaging station pool for municipal supply for village of
Nyack. Discharge given for this station represents the flow of
Hackensack River downstream from this diversion. At flows
greater than about 1,500 ft³/s, undetermined amounts of flow
bypass the gage as a result of overtopping of the Klein Avenue
Levee 0.3 mi upstream of the gage.
Water Years 2014-21: Records fair.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 2,120
ft³/s, Sept. 2, 2021, gage height, 11.80 ft; minimum discharge