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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 08180990 Leon Ck at IH 10 and Loop 1604 nr San Antonio, TX
Bexar County, Texas
Hydrologic Unit Code 12100302
Latitude  29°35'35", Longitude  98°35'57" NAD83
Drainage area 38.5  square miles
Contributing drainage area 38.5  square miles
Gage datum 978.70 feet above NAVD88
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 
12025-05-28 14:33:08CDTYesCAH/ABMUSGS2236.110.050.20FairDebrisLightNONE
22025-05-28 13:30:49CDTYesCAH/ABMUSGS2946.430.180.60Fair NONE