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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 04264331 ST. LAWRENCE R AT CORNWALL ONT NR MASSENA NY
St. Lawrence County, New York
Hydrologic Unit Code 04150310
Latitude  45°00'22", Longitude  74°47'42" NAD83
Drainage area 298,800  square miles
Output formats
HTML table with channel data
HTML table without channel data
Tab-separated data with channel data
Tab-separated data without channel data
Graph of 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 
442025-07-16 10:14:10ESTYesJFW/AJK/AMKUSGS280000 GoodClearNONE
432025-06-25 10:23:15ESTYesAJK/MBJ/JSGUSGS281000 0.00 GoodClearNONE
422025-05-21 11:09:39ESTYesJFW/MBJ/AJKUSGS266000 GoodClearNONE
412024-10-09 09:25:30ESTYesJDB, MS, BMUSGS266000 Good NONE
402024-08-07 10:25:32ESTYesBPM, jb, msUSGS293000 Good NONE
392024-07-18 10:04:04ESTYesBPM, JB, MSUSGS288000 Good NONE
382024-06-05 09:04:33ESTYesBPM,JB,JTUSGS290000 Good NONE
372024-05-21 09:01:06ESTYesBPM, jb, jtUSGS293000 Good NONE
362024-05-07 08:46:12ESTYesBPM/JB/MWSUSGS295000 Good NONE
352024-04-24 09:21:16ESTYesBPM/JB/MWSUSGS309000 Good NONE
342023-10-26 09:22:42ESTYesJB,BPM,MWSUSGS279000 Poor NONE
332023-07-19 09:38:08ESTYesBPM/JB/MDWSUSGS306000 Good NONE
322023-06-21 09:12:02ESTYesBPM/JB/MBWSUSGS307000 Good NONE
312023-06-01 09:13:39ESTYesBPM/JB/MDWSUSGS310000 Good NONE
302023-05-09 09:28:23ESTYesBPM/JB/MBWSUSGS256000 Good NONE
292022-10-13 09:27:38ESTYesBPM/JB/MWSUSGS250000 Fair NONE
282022-09-14 09:42:02ESTYesBPM/JDB/NCUSGS277000 Good NONE
272022-08-17 09:54:20ESTYesBPM/JDB/NCUSGS288000 Good NONE
262022-07-20 10:01:19ESTYesBPM/JDB/NCUSGS309000 Fair NONE
252022-05-17 10:06:43ESTYesJDB/MBJUSGS318000 Fair NONE
242020-10-21 09:45:59ESTYesCM/JB/DGUSGS302000 Fair NONE
232020-09-29 09:38:49ESTYesCIM/JDBUSGS299000 Fair NONE
222015-06-23 10:06:40ESTYesJDB, JKUSGS268000 Poor NONE
212011-08-24 09:13:30ESTYesGRW/DDEUSGS285000 2.10GoodUnspecifedNONE
202011-05-25 10:05ESTYesGRW/JDBUSGS292000 2.00GoodUnspecifedNONE
192010-10-05 10:28ESTYesGRW/JDBUSGS260000 2.20FairUnspecifedNONE
182010-08-25 -- ----YesGRW/JDBUSGS135000 Good NONE
172010-06-22 08:17ESTYesGRW/JDBUSGS224000 GoodClearNONE
162010-05-11 08:19ESTYesEAN/DDEUSGS228000 0.50GoodUnspecifedNONE
152010-04-14 08:25:30ESTYesEAN/DDEUSGS244000 0.50GoodUnspecifedNONE
142009-08-04 08:40ESTYesEAN/TMSUSGS289000 FairUnspecifedNONE
132009-08-04 07:45ESTYesEAN/TMSUSGS282000 GoodUnspecifedNONE
122009-05-12 10:05ESTYesEAN/JDBUSGS284000 FairUnspecifedNONE
112009-05-12 09:13:30ESTYesEAN/JDBUSGS280000 1.00GoodUnspecifedNONE
102008-10-30 07:24ESTYesGRW/CPTUSGS256000 0.50GoodUnspecifedNONE
92008-08-19 09:15ESTYesGRW/JDBUSGS289000 UnspecifiedUnspecifedNONE
82008-08-19 07:00ESTYesGRW/JDBUSGS283000 UnspecifiedUnspecifedNONE
72008-06-18 08:51ESTYesEAN/GRWUSGS283000 FairClearNONE
62008-06-18 07:38ESTYesEAN/GRWUSGS289000 FairClearNONE
52008-05-28 09:22ESTYesEAN/GRWUSGS268000 FairClearNONE
42008-05-28 08:25ESTYesEAN/GRWUSGS290000 FairClearNONE
32008-05-28 06:59ESTYesEAN/GRWUSGS310000 FairClearNONE
22008-05-06 10:45ESTYesEAN/GRWUSGS296000 GoodClearNONE
12008-05-06 06:20ESTYesEAN/GRWUSGS290000 GoodClearNONE