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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 01583200 BLACKROCK RUN AT COOPERSVILLE, MD
Baltimore County, Maryland
Hydrologic Unit Code 02060003
Latitude  39°32'36", Longitude  76°44'00" NAD27
Drainage area 9.38  square miles
Output formats
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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)
162008-09-19 12:25EDTYesJRDUSGS3.63 0.000.50GoodClearNONE1Imported Channel 1WADEQSCMMVADV3.6313.67.780.47FIRMGRVLEVENunknEVENUNSPUPST20.00
152008-09-16 12:55EDTYesJRDUSGS3.83 0.000.50GoodClearNONE1Imported Channel 1WADEQSCMMVADV3.8313.68.350.46FIRMGRVLEVENunknEVENUNSPUPST10.00
142008-09-03 15:50EDTYesJRDUSGS3.09 0.000.50GoodClearNONE1Imported Channel 1WADEQSCMMVADV3.0913.47.100.44FIRMGRVLEVENunknEVENUNSPUPST10.00
132002-09-19 13:50EDTYesJJKUSGS0.95 Poor NONE1Imported Channel 1WADEunspeunkno0.958.004.740.20UNSPUNSPUNSPunknUNSPUNSPUNSP
121966-07-21 16:02ESTYesBMHUSGS1.26 GoodClearNONE1Imported Channel 1WADEunspeunkno1.265.001.440.87UNSPUNSPUNSPunknUNSPUNSPUNSP
111963-09-26 12:35ESTYesEJPUSGS2.10 GoodClearNONE1Imported Channel 1WADEunspeunkno2.107.302.760.76UNSPUNSPUNSPunknUNSPUNSPUNSP
101963-07-30 09:20ESTYesEJPUSGS3.44 GoodClearNONE1Imported Channel 1WADEunspeunkno3.449.506.700.51UNSPUNSPUNSPunknUNSPUNSPUNSP
91962-08-30 09:45ESTYesDHCUSGS2.90 GoodClearNONE1Imported Channel 1WADEunspeunkno2.906.804.400.66UNSPUNSPUNSPunknUNSPUNSPUNSP
81962-07-30 12:00ESTYesDHCUSGS4.59 GoodClearNONE1Imported Channel 1WADEunspeunkno4.5911.86.220.74UNSPUNSPUNSPunknUNSPUNSPUNSP
71959-09-28 13:10ESTYesJMDUSGS1.50 FairClearNONE1Imported Channel 1WADEunspeunkno1.506.202.100.71UNSPUNSPUNSPunknUNSPUNSPUNSP
61959-05-12 12:10ESTYesAGTUSGS5.33 GoodClearNONE1Imported Channel 1WADEunspeunkno5.3312.411.90.45UNSPUNSPUNSPunknUNSPUNSPUNSP
51958-09-09 13:50ESTYesAGTUSGS4.96 GoodClearNONE1Imported Channel 1WADEunspeunkno4.9612.713.90.36UNSPUNSPUNSPunknUNSPUNSPUNSP
41958-06-06 11:00ESTYesAGTUSGS13.8 GoodClearNONE1Imported Channel 1WADEunspeunkno13.820.214.60.95UNSPUNSPUNSPunknUNSPUNSPUNSP
31957-08-22 16:50ESTYesAGTUSGS2.68 GoodClearNONE1Imported Channel 1WADEunspeunkno2.687.802.740.98UNSPUNSPUNSPunknUNSPUNSPUNSP
21957-05-07 07:50ESTYesLCDUSGS10.6 FairClearNONE1Imported Channel 1WADEunspeunkno10.620.011.80.90UNSPUNSPUNSPunknUNSPUNSPUNSP
11956-05-26 09:35ESTYesLCDUSGS10.4 GoodClearNONE1Imported Channel 1WADEunspeunkno10.417.512.50.83UNSPUNSPUNSPunknUNSPUNSPUNSP