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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 01400630 Millstone R at Southfield Rd nr Grovers Mill NJ
Mercer County, New Jersey
Hydrologic Unit Code 02030105
Latitude  40°18'12", Longitude  74°34'32" NAD83
Drainage area 41.00  square miles
Gage datum 62.63 feet above NGVD29
Output formats
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Tab-separated data with channel data
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Meas.
Number		   Date       Time Time
Datum		 Measurement
Used?		   Who Measuring
Agency		 Stream
flow
(ft3/s)		 Gage
Height
(ft)		 GH
Change
(ft)		 Meas.
Duration
(hr)		 Meas.
Rated		   Control Flow
Adjust.
Code 		 Channel
Number		 Channel
Name		 Meas.
type 		 Stream
flow
method 		 Velocity
method 		 Channel
flow
(ft3/s)		 Channel
width
(ft)		 Channel
area
(ft2)		 Channel
vel.
(ft/s)		 Channel
stability 		 Channel
material 		 Channel
evenness 		 Long.
vel.
desc. 		 Horz.
vel.
desc. 		 Vert.
vel.
desc. 		 Channel
loc.
code 		 Channel
loc.
dist.(ft)
221999-09-18 11:45EDTYesV C/G MUSGS4054.340.091.00FairUnspecifedNONE1Imported Channel 1CRANunspeunkno40561.04630.87UNSPUNSPUNSPunknUNSPUNSPUNSP
211999-09-17 15:52EDTYesJFD/WDJUSGS10606.15-0.071.00FairDebrisModerateNONE1Imported Channel 1CRANunspeunkno106066.04222.52UNSPUNSPUNSPunknUNSPUNSPUNSP
201998-06-10 09:15EDTYesGLCUSGS2253.23-0.050.70FairClearNONE1Imported Channel 1CRANunspeunkno22560.02530.89UNSPUNSPUNSPunknUNSPUNSPUNSP
191997-08-19 09:30EDTYesJFDUSGS23.90.020.000.50GoodClearNONE1Imported Channel 1WADEunspeunkno23.913.511.72.04UNSPUNSPUNSPunknUNSPUNSPUNSP
181996-10-19 18:00EDTYesJFD/JJSUSGS6555.240.000.10FairUnspecifedNONE1Imported Channel 1OTHRQIDIR 655 UNSPUNSPUNSPunknUNSPUNSPUNSP
171996-04-16 10:43EDTYesJFD/CMUSGS1742.630.141.40FairClearNONE1Imported Channel 1CRANunspeunkno17461.02300.76UNSPUNSPUNSPunknUNSPUNSPUNSP
161994-01-29 12:46ESTYesAJVUSGS12106.80-0.221.80Unspecified NONE1Imported Channel 1CRANunspeunkno121063.04462.71UNSPUNSPUNSPunknUNSPUNSPUNSP
151993-04-01 15:30ESTYesAJVUSGS6604.36-0.02 UnspecifiedUnspecifedNONE1Imported Channel 1CRANunspeunkno66064.03232.04UNSPUNSPUNSPunknUNSPUNSPUNSP
141992-12-12 16:10ESTYesAJVUSGS10906.70-0.10 Fair NONE1Imported Channel 1CRANunspeunkno109064.0 0.00UNSPUNSPUNSPunknUNSPUNSPUNSP
131992-06-06 13:45EDTYesAJVUSGS2934.130.041.50FairDebrisLightNONE1Imported Channel 1CRANunspeunkno29365.03040.96UNSPUNSPUNSPunknUNSPUNSPUNSP
121991-09-25 13:00EDTYesDSKUSGS94.9 -0.071.00FairClearNONE1Imported Channel 1CRANunspeunkno94.964.52300.41UNSPUNSPUNSPunknUNSPUNSPUNSP
111989-09-21 10:30EDTYesGLC/JDJUSGS5185.26-0.101.00FairClearNONE1Imported Channel 1CRANunspeunkno51863.03761.38UNSPUNSPUNSPunknUNSPUNSPUNSP
101989-03-31 15:00ESTYesRGRUSGS94.62.230.020.80GoodDebrisLightNONE1Imported Channel 1CRANunspeunkno94.664.01910.50UNSPUNSPUNSPunknUNSPUNSPUNSP
91986-04-18 -- ----YesJFDUSGS6473.99-0.071.00FairClearNONE1Imported Channel 1CRANunspeunkno64766.03621.79UNSPUNSPUNSPunknUNSPUNSPUNSP
81985-05-03 -- ----YesGLCUSGS1222.75-0.021.00FairClearNONE1Imported Channel 1CRANunspeunkno12265.02430.50UNSPUNSPUNSPunknUNSPUNSPUNSP
71983-04-18 -- ----YesGLC/DOSUSGS2363.48 GoodClearNONE1Imported Channel 1CRANunspeunkno23664.53290.72UNSPUNSPUNSPunknUNSPUNSPUNSP
61982-02-03 -- ----YesKCAUSGS3514.35 FairIceCoverNONE1Imported Channel 1BRUSunspeunkno35160.02821.24UNSPUNSPUNSPunknUNSPUNSPUNSP
51981-05-12 -- ----YesJTFUSGS3293.90 FairDebrisLightNONE1Imported Channel 1CRANunspeunkno32965.03221.02UNSPUNSPUNSPunknUNSPUNSPUNSP
41981-02-21 -- ----YesKCAUSGS2044.00 Good NONE1Imported Channel 1CRANunspeunkno20475.04120.50UNSPUNSPUNSPunknUNSPUNSPUNSP
31980-04-11 -- ----YesJFDUSGS2843.61-0.061.20FairClearNONE1Imported Channel 1CWAYunspeunkno28466.03860.74UNSPUNSPUNSPunknUNSPUNSPUNSP
21980-03-22 -- ----YesAJVUSGS3343.860.011.50Fair NONE1Imported Channel 1CWAYunspeunkno33465.03700.94UNSPUNSPUNSPunknUNSPUNSPUNSP
11979-09-07 -- ----YesJBCUSGS5575.26-0.071.60GoodUnspecifedNONE1Imported Channel 1BRUSunspeunkno55767.04761.17UNSPUNSPUNSPunknUNSPUNSPUNSP