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Hydrograph River at a Glance Download
Frio River at Choke Canyon Dam Pool (ft)Observed: 197.33 ft at 7:00AM May 07, 2021Observed: 197.33 ft at 7:30AM May 07, 2021Observed: 197.26 ft at 7:00AM May 08, 2021Observed: 197.26 ft at 7:30AM May 08, 2021Observed: 197.3 ft at 7:00AM May 09, 2021Observed: 197.3 ft at 7:30AM May 09, 2021Highest Observation: 197.38 ft at 7:00AM May 10, 2021Highest Observation: 197.38 ft at 7:30AM May 10, 2021Observed: 197.37 ft at 7:00AM May 11, 2021Observed: 197.37 ft at 7:30AM May 11, 2021USGS--Water Resources of the United StatesCHOT2(plotting HPIRZ) Graph Created (5:31PM May 11, 2021)ObservedLatest observed value: 197.37 ft at 7:30 AM CDT 11-May-2021.
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Tabular Data (UTC)
Tabular Data (CDT)
XML Data
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Datum: Not Available
NOTE: Forecasts are not available for the Frio River at Choke Canyon Dam. Only observed stages are available for this point.
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Upstream Gauge - at Tilden Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 0
Low Stage (in feet): 0

Historic Crests

(P): Preliminary values subject to further review.

Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
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Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
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(1) Choke Canyon Dam Looking Northeast
(2) Choke Canyon Dam Looking Northward
(3) Another Northward View of Reservoir
(4) Release Gates At Choke Canyon Dam
(5) Release Gates - Choke Canyon Dam
(6) Looking Downstream From Release Gates
(7) Looking Toward Gates at Reservoir
(8) Releases at Choke Canyon Dam
(9) Release Gates at Choke Canyon Dam
(10) July 2002 Areal View Showing Releases Downstream
(11) July 2002 Areal View of Dam
(12) Releases at Dam During July 2002
(13) July 2002: Frio River Heading Into Choke Canyon
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Latitude: 28.483611° N, Longitude: 98.245556° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 0 ft 0 ft  

Current/Historical Observations:

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NWS Information
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Corpus Christi, TX 78406-1803
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Page last modified: 30-Oct-2020 4:09 PM
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