Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins
Click to hide state-specific text


! We're replacing this page with a Next Generation Monitoring Location Page.
We're modernizing Water Data for the Nation delivery. Find out what this means for you. This page will be discontinued Jan.1, 2023.

USGS 01394000 West Branch Rahway River at Millburn NJ


Click to hidestation-specific text
Funding for this site is provided by:



LOCATION.--Lat 40°43'54", long 74°18'27" referenced to North American Datum of 1983, Millburn Township, Essex County, NJ, Hydrologic Unit 02030104, on right bank 100 ft upstream from Diamond Mill Pond Dam, 1,000 ft upstream from Glen Avenue in Millburn, and 1.9 mi upstream from confluence with East Branch.
DRAINAGE AREA.--7.10 mi2.
PERIOD OF RECORD.--Continuous-record gaging station, water years 1940-50. Annual maximum, water years 1973, 1998 to current year.
GAGE.--Water-stage recorder with telemetry and crest-stage gage. Datum of gage is 173.65 ft above NGVD of 1929.
REMARKS.--Flow regulated by Orange Reservoir 2.5 mi upstream and several small ponds. Annual peak data can be obtained by selecting Peak streamflow from the 'Available data for this site' drop-down menu above or by using this link.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 2,840 ft3/s, Sep 16, 1999, gage height, 5.2 ft (from high-water mark).

Peak Flood Chart

Gage Photo

This station managed by the New Jersey Water Science Center.

Available Parameters Available Period
2021-06-18  2021-10-16
2007-10-01  2021-10-16


  -- or --



Summary of all available data for this site
Instantaneous-data availability statement

Temperature, water, degrees Celsius

Most recent instantaneous value: 17.6 10-16-2021   05:00 EDT
Graph of  Temperature, water, degrees Celsius

Add up to 2 more sites and replot for "Temperature, water, degrees Celsius"


Create presentation-quality / stand-alone graph.   Subscribe to WaterAlert      

See this graph on the Monitoring Location Pages