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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 02370140 BLACKWATER RIVER NR HAROLD, FL


Santa Rosa County, Florida
Hydrologic Unit Code 03140104
Latitude  30°42'17.0", Longitude  86°52'54.2" NAD83
Drainage area 298  square miles
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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
 
182025-08-15 11:00:19CDTYesjbdUSGS523 PoorDebrisModerateNONE
172025-05-13 10:08:13CDTYesjbdUSGS6014.38 GoodClearNONE
162025-04-09 11:52:14CDTYesjbdUSGS11305.820.020.25FairDebrisHeavyNONE
152025-03-12 14:12:28CDTYesJBD/NKYUSGS4413.52-0.020.25FairDebrisLightNONE
142025-01-15 10:59:56CSTYesjbdUSGS6954.49 FairDebrisModerateNONE
132024-10-23 12:24:17CDTYesjbd/rmc/jmcUSGS1761.850.000.25PoorDebrisModerateNONE
121992-11-17 12:25CSTYesGTLUSGS4301.88-0.010.70Good NONE
111992-09-29 08:50CDTYesGTLUSGS3191.15 Good NONE
101938-11-06 -- ----YesRLTUSGS2050.840.002.20Excellent NONE
91938-10-19 -- ----YesDSWUSGS1750.68-0.011.50Good NONE
81938-09-28 09:00CSTYesRLT/HHCUSGS2261.030.022.50Good NONE
71938-09-28 08:00CSTYesRLT/HHCUSGS2341.030.022.50Unspecified NONE
61938-09-08 -- ----YesELH/RLTUSGS2881.480.001.50Good NONE
51938-08-05 -- ----YesBPSUSGS6353.26-0.031.00Fair NONE
41938-08-03 -- ----YesBPSUSGS16306.46-0.111.50Good NONE
31938-07-20 -- ----YesBPS/DSWUSGS6863.020.061.50Good NONE
21935-11-07 -- ----YesELHUSGS2090.96-0.010.70Unspecified NONE
11933-10-25 -- ----YesNAUSGS2411.010.000.80FairDebrisModerateNONE