Benbrook Lake Water Level Today - 688.21 ft, 77.1% Full

Trinity River · Texas - updated daily from official gauges

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

• Benbrook Lake is 77.1% full - high on this site's capacity scale - as of September 8, 2026. Surface elevation 688.21 feet, storage 66,074 acre-feet (capacity basis 85,648 acre-feet), per Texas Water Development Board data.
• That elevation is its lowest September reading since 2023, and 12.05 feet above its record low of 676.16 ft (October 8, 2011), in a daily record going back to September 30, 1988 (TWDB's period of record for this reservoir).
• Storage is 94% of the September 8 average across 36 years of record.
• Benbrook Lake is falling: elevation changed -0.62 ft over the past week, -3.63 ft over the past month, and -3.70 ft over the past year, per Texas Water Development Board data.

Benbrook Lake has fallen 3.70 feet in twelve months, and now sits 12.05 feet above its record low.

Benbrook Lake vs its record low

In the daily record used by this site (going back to September 30, 1988 (TWDB's period of record for this reservoir)), Benbrook Lake's lowest surface elevation was 676.16 feet on October 8, 2011, when storage was 34,044 acre-feet. As of September 8, 2026, Benbrook Lake is at 688.21 feet - 12.05 feet above that record. The record high in the same series was 716.61 ft on June 15, 1989.

Benbrook Lake storage in context

Benbrook Lake water level, past 12 months

77.1% full at the latest reading - across the past 12 months it ranged from 77.1% (September 8, 2026) to 100.0% (June 24, 2026). Percent full is storage against the 85,648-acre-foot capacity basis, not a share of the elevation plotted above.

Benbrook Lake elevation, full record

77.1% full at the latest reading - across the storage record since October 2, 1952 it ranged from 0.0% (October 2, 1952) to 103.0% (December 31, 1997). Percent full is storage against the 85,648-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 Benbrook Lake today?

As of September 8, 2026, Benbrook Lake's surface elevation is 688.21 feet, with 66,074 acre-feet in storage - 77.1% of the 85,648 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Benbrook Lake?

Benbrook Lake is 77.1% full as of September 8, 2026. Its storage is 94% of the September 8 average across its record since 1988. Source: Water Data for Texas (TWDB) daily data.

When was Benbrook Lake last full?

Benbrook Lake was last at or above 95% of its 85,648 acre-foot capacity basis on July 8, 2026. As of September 8, 2026 it is 77.1% full. Source: Water Data for Texas (TWDB) daily data.

Is Benbrook Lake rising or falling?

Benbrook Lake is falling: its elevation changed -0.62 feet over the week ending September 8, 2026, -3.63 ft over the past month, and -3.70 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was Benbrook Lake's lowest water level on record?

Benbrook Lake's lowest surface elevation in the daily record since September 30, 1988 was 676.16 feet on October 8, 2011, per the daily record used by this site. As of September 8, 2026 the reservoir is 12.05 feet above that record low.

About this gauge

Benbrook Lake is a Texas water-supply reservoir in the Trinity River basin. Water Data for Texas publishes a conservation pool elevation of 694.0 ft and a conservation capacity of 85,648 acre-feet, with daily water level and storage recorded since 1952-10-02.

Operator

Texas Water Development Board (Water Data for Texas)

Station

benbrook

Measurements

Daily water level and conservation storage

River

Trinity River

State

Texas

Full pool reference

694.0 ft

Capacity basis

85,648 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

September 30, 1988 (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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