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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 340246117211701 RIALTO DRAIN A AGUA MANSA RD NR GRAND TERRACE CA
San Bernardino County, California
Hydrologic Unit Code 18070203
Latitude  34°02'46", Longitude 117°21'17.27" NAD83
Gage datum 876 feet above NGVD29
Output formats
HTML table with channel data
HTML table without channel data
Tab-separated data with channel data
Tab-separated data without 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 
362018-06-13 09:08:30PDTYesRBCUSGS10.3 PoorClearNONE
352018-05-07 11:32PDTYesRBCUSGS10.5 PoorClearNONE
342018-04-09 14:41PDTYesRBCUSGS9.73 PoorClearNONE
332018-03-19 11:35PDTYesRBCUSGS9.62 PoorClearNONE
322018-02-12 10:21:30PSTYesRBCUSGS10.6 PoorClearNONE
312018-01-17 10:57PSTYesRBCUSGS7.18 PoorClearNONE
302017-12-13 11:04PSTYesRBCUSGS10.7 PoorClearNONE
292017-11-15 10:55PSTYesRBCUSGS10.2 PoorClearNONE
282017-10-11 12:41PDTYesRBC/JWNUSGS8.78 PoorClearNONE
272017-09-20 10:56:30PDTYesRBCUSGS10.6 PoorClearNONE
262017-08-22 10:02:48PDTYesRBC/RATUSGS10.9 PoorClearNONE
252017-07-27 10:02:30PDTYesRBCUSGS9.45 PoorClearNONE
242017-06-29 10:49PDTYesMES/RBCUSGS9.60 PoorUnspecifedNONE
232017-04-19 10:02:30PDTYesRBC/MKMUSGS8.96 PoorClearNONE
222017-02-15 10:18PSTYesRBC/MESUSGS9.81 PoorClearNONE
212016-12-15 11:54PSTYesRBC/MKMUSGS9.95 FairClearNONE
202016-10-27 10:47:30PDTYesRBCUSGS9.22 PoorClearNONE
192016-08-18 15:36:30PDTYesRBC/MKMUSGS9.60 PoorClearNONE
182016-07-26 08:24:30PDTYesRat/mesUSGS8.20 FairUnspecifedNONE
172016-06-16 11:58:30PDTYesJENUSGS9.64 FairClearNONE
162016-05-02 11:27PDTYesRBC/RATUSGS10.1 PoorClearNONE
152016-04-21 10:46PDTYesRBCUSGS8.53 FairClearNONE
142016-03-01 11:00PSTYesRBC/MESUSGS7.79 FairClearNONE
132016-02-17 10:35PSTYesRBCUSGS9.68 FairClearNONE
122016-01-19 09:41PSTYesRBCUSGS9.00 FairClearNONE
112015-12-18 09:23:30PSTYesRBC/RATUSGS7.26 FairClearNONE
102015-11-02 09:40PSTYesRBC/JWNUSGS7.75 FairClearNONE
92015-10-22 10:39:30PDTYesRBC/JWNUSGS8.30 0.000.40FairClearNONE
82015-09-23 09:05PDTYesJWN/RBCUSGS7.560.520.090.50FairClearNONE
72015-08-19 11:05PDTYesjwnelsonUSGS10.6 0.40Fair NONE
62015-07-21 09:53:30PDTYestakUSGS8.48 0.60Fair NONE
52015-07-21 09:37:30PDTYesjwnelsonUSGS9.10 0.50Fair NONE
42015-01-15 09:29:30PSTYesJWNUSGS10.80.29 0.60FairClearNONE
32015-01-15 09:17PSTYesLBC/JWNUSGS10.70.27 UnspecifiedClearNONE
22015-01-14 12:00PSTYesJWNUSGS10.10.28 Unspecified NONE
12015-01-14 11:23PSTYesJWNUSGS10.10.28 Unspecified NONE