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Colorado River (TX) at Bastrop, TX (BRTT2)


Data Type




Inundation Levels
NAVD88 Stage

Record Crest: 60.3 ft
351.6 44.0
350.6 43.0
349.6 42.0
348.6 41.0
347.6 40.0
346.6 39.0
345.6 38.0
344.6 37.0
343.6 36.0
342.6 35.0
341.6 34.0
340.6 33.0
339.6 32.0
338.6 31.0
337.6 30.0
336.6 29.0
335.6 28.0

Major Flooding Begins

334.6 27.0
333.6 26.0
332.6 25.0

Moderate Flooding Begins

331.6 24.0
330.6 23.0

Minor Flooding Begins

329.6 22.0
* = Extended rating
Weather Forecast Office Austin/San Antonio, TX West Gulf River Forecast Center

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Current Stage:
2.4 ft at 10/26/2014 02:00:00 UTC
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Inundation Legend Inundation Legend
USGS Gauge Location Gauge Location

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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Flood Categories (in feet)
Major Flood Stage:28
Moderate Flood Stage:25
Flood Stage:23
Action Stage:14

Historical Crests
(1) 60.30 ft on 07/07/1869
(2) 57.00 ft on 06/16/1935
(3) 53.30 ft on 12/04/1913
(4) 37.48 ft on 12/22/1991
(5) 34.45 ft on 10/29/1960
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(P): Preliminary values subject to further review.

Low Water Records

Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.

Extended rating:
Rating Curve Extension - The Rating Curve Extension is calculated by using either a linear, logarithmic, or hydraulic technique to extend the rating curve above the currently established relationship between stage and flow.

Flood Impacts Collapse
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37 Widespread disastrous flooding is to the roofs of the lowest homes in the Doty River, Hidden Valley, and Pecan Shores subdivisions above Smithville. Flow approaches the lowest homes and the golf course near Bastrop.
35 Disastrous flooding severely floods homes between Bastrop and Smithville in the Doty River, Hidden Valley, and Pecan Shores subdivisions. Livestock are extremely vulnerable in the flood plain. Roads and bridges flood severely and are very dangerous. Flow threatens lowest homes near bastrop and facilities and lowest areas of the golf course near Bastrop.
33 Disastrous flooding severely damages the Doty River, Hidden Valley, and Pecan Shores subdivisions above Smithville. Roads and bridges near the river are very dangerous.
31 Disastrous flooding reaches many homes between Bastrop and Smithville in the Doty River, Hidden Valley and Pecan Shores subdivisions. Roads and bridges in the flood plain are very dangerous. Livestock should be moved from the flood plain.
29 Lowest homes in the Doty River, Hidden Valley and Pecan Shores subdivisions above Smithville flood. Many primary and secondary roads and bridges flood and are very dangerous to motorists. Livestock and equipment should be moved from the flood plain.
28 Major flooding reaches lowest homes downstream above Smithville in the Doty River, Pecan Shores, and Hidden Valley Estate subdivisions. Low roads and bridges near the river flood and are very dangerous to motorists.
27 Moderate lowland flooding below Austin to below Smithville threatens homes above Smithville in the Doty River, Hidden Valley, and Pecan Shores Estates subdivisions. Livestock should be moved from vulnerable areas of the flood plain. Low roads and bridges in the flood plain are flooded and dangerous to motorists.
25 Moderate lowland flooding reaches bottomlands above Bastrop near the Colorado River and Piney and Wilbarger Creek confluences. Water begins to enter the city park and officials will close the park.
23 Minor lowland flooding reaches lowest areas of the flood plain. Secondary roads and low bridges are flooded.
20 Flow exceeds bankfull into lowest areas of the flood plain. Jogging trail at Fisherman's Park is flooded.
18 Flow exceeds bankfull into lowest areas of the flood plain.
16 Flow exceeds bankfull into lowest areas of the flood plain.
14 Flow exceeds low sections of the banks.
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Page last modified: 15-Jul-2014 6:27 PM
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Graphical representation of flood inundation for NWS flood categories are based on steady state hydraulic modeling of water surface elevations for incremented discharges. Map shows approximate inundation areas for given water surface elevations and should not be used for navigation or permitting or other legal purposes, but strictly as a planning reference tool.