Twin Buttes Reservoir Water Level Today - 1,896.73 ft, 5.8% Full

Colorado River (Texas) · Texas - updated daily from official gauges

Western Reservoir Conditions·Daily·No. 47·Tuesday, September 8, 2026·Latest reading September 8, 2026

• Twin Buttes Reservoir is 5.8% full - critically low on this site's capacity scale - as of September 8, 2026. Surface elevation 1,896.73 feet, storage 10,508 acre-feet (capacity basis 182,454 acre-feet), per Texas Water Development Board data.
• That elevation is its lowest September reading since 2018, and 15.65 feet above its record low of 1,881.08 ft (November 9, 2013), in a daily record going back to October 1, 2000 (TWDB's period of record for this reservoir).
• Storage is 36% of the September 8 average across 25 years of record.
• Twin Buttes Reservoir is falling: elevation changed -0.57 ft over the past week, -2.23 ft over the past month, and -10.56 ft over the past year, per Texas Water Development Board data.

Twin Buttes Reservoir has fallen 10.56 feet in twelve months, and now sits 15.65 feet above its record low.

Twin Buttes Reservoir vs its record low

In the daily record used by this site (going back to October 1, 2000 (TWDB's period of record for this reservoir)), Twin Buttes Reservoir's lowest surface elevation was 1,881.08 feet on November 9, 2013, when storage was 0 acre-feet. As of September 8, 2026, Twin Buttes Reservoir is at 1,896.73 feet - 15.65 feet above that record. The record high in the same series was 1,934.72 ft on June 18, 2019.

Twin Buttes Reservoir storage in context

Twin Buttes Reservoir water level, past 12 months

5.8% full at the latest reading - across the past 12 months it ranged from 5.8% (September 8, 2026) to 14.5% (September 8, 2025). Percent full is storage against the 182,454-acre-foot capacity basis, not a share of the elevation plotted above.

Twin Buttes Reservoir elevation, full record

5.8% full at the latest reading - across the storage record since October 2, 1962 it ranged from 0.0% (October 2, 1962) to 100.0% (June 5, 1977). Percent full is storage against the 182,454-acre-foot capacity basis, not a share of the elevation plotted above. Every percentage here is measured against today's capacity basis; a reservoir's surveyed capacity changes as sediment accumulates behind the dam, so early-record percentages are indicative rather than exact.

Last 14 daily readings

Frequently asked questions

What is the water level of Twin Buttes Reservoir today?

As of September 8, 2026, Twin Buttes Reservoir's surface elevation is 1,896.73 feet, with 10,508 acre-feet in storage - 5.8% of the 182,454 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Twin Buttes Reservoir?

Twin Buttes Reservoir is 5.8% full as of September 8, 2026. Its storage is 36% of the September 8 average across its record since 2000. Source: Water Data for Texas (TWDB) daily data.

When was Twin Buttes Reservoir last full?

Twin Buttes Reservoir was last at or above 95% of its 182,454 acre-foot capacity basis on July 2, 1977. As of September 8, 2026 it is 5.8% full. Source: Water Data for Texas (TWDB) daily data.

Is Twin Buttes Reservoir rising or falling?

Twin Buttes Reservoir is falling: its elevation changed -0.57 feet over the week ending September 8, 2026, -2.23 ft over the past month, and -10.56 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was Twin Buttes Reservoir's lowest water level on record?

Twin Buttes Reservoir's lowest surface elevation in the daily record since October 1, 2000 was 1,881.08 feet on November 9, 2013, per the daily record used by this site. As of September 8, 2026 the reservoir is 15.65 feet above that record low.

About this gauge

Twin Buttes Reservoir is a Texas water-supply reservoir in the Colorado River (Texas) basin. Water Data for Texas publishes a conservation pool elevation of 1,940.2 ft and a conservation capacity of 182,454 acre-feet, with daily water level and storage recorded since 1962-10-02.

Operator

Texas Water Development Board (Water Data for Texas)

Station

twin-buttes

Measurements

Daily water level and conservation storage

River

Colorado River (Texas)

State

Texas

Full pool reference

1,940.2 ft

Capacity basis

182,454 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

October 1, 2000 (TWDB's period of record for this reservoir)

Status

Provisional - subject to revision by the reporting agency

Update cadence

Daily

TWDB reports conservation storage against a conservation capacity that is restated as new volumetric surveys are completed, so a percent-full figure here can change without the water level changing. TWDB's methodology page is linked in the notes below.

Download the daily CSV (date, elevation ft, storage AF) or see all data downloads.

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