Lake Alan Henry Water Level Today - 2,209.02 ft, 72.1% Full

Brazos River · Texas - updated daily from official gauges

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

• Lake Alan Henry is 72.1% full - moderate on this site's capacity scale - as of September 8, 2026. Surface elevation 2,209.02 feet, storage 69,405 acre-feet (capacity basis 96,207 acre-feet), per Texas Water Development Board data.
• That elevation is its lowest September reading since 2014, and 7.78 feet above its record low of 2,201.24 ft (September 5, 2014, the lowest since the reservoir first filled), in a daily record going back to October 1, 1997 (TWDB's period of record for this reservoir).
• Storage is 84% of the September 8 average across 29 years of record.
• Lake Alan Henry is falling: elevation changed -0.29 ft over the past week, -1.34 ft over the past month, and -8.77 ft over the past year, per Texas Water Development Board data.

Lake Alan Henry has fallen 8.77 feet in twelve months, and now sits 7.78 feet above its record low.

Lake Alan Henry vs its record low

In the daily record used by this site (going back to October 1, 1997 (TWDB's period of record for this reservoir)), Lake Alan Henry's lowest surface elevation since it first filled (first near-full reading 2004) was 2,201.24 feet on September 5, 2014, when storage was 52,966 acre-feet. As of September 8, 2026, Lake Alan Henry is at 2,209.02 feet - 7.78 feet above that record. The record high in the same series was 2,229.31 ft on July 5, 2010.

Lake Alan Henry storage in context

Lake Alan Henry water level, past 12 months

72.1% full at the latest reading - across the past 12 months it ranged from 72.1% (September 8, 2026) to 93.7% (September 8, 2025). Percent full is storage against the 96,207-acre-foot capacity basis, not a share of the elevation plotted above.

Lake Alan Henry elevation, full record

72.1% full at the latest reading - across the storage record since October 1, 1997 it ranged from 36.0% (March 17, 1999) to 120.5% (June 15, 2005). Percent full is storage against the 96,207-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 Lake Alan Henry today?

As of September 8, 2026, Lake Alan Henry's surface elevation is 2,209.02 feet, with 69,405 acre-feet in storage - 72.1% of the 96,207 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Lake Alan Henry?

Lake Alan Henry is 72.1% full as of September 8, 2026. Its storage is 84% of the September 8 average across its record since 1997. Source: Water Data for Texas (TWDB) daily data.

When was Lake Alan Henry last full?

Lake Alan Henry was last at or above 95% of its 96,207 acre-foot capacity basis on August 7, 2025. As of September 8, 2026 it is 72.1% full. Source: Water Data for Texas (TWDB) daily data.

Is Lake Alan Henry rising or falling?

Lake Alan Henry is falling: its elevation changed -0.29 feet over the week ending September 8, 2026, -1.34 ft over the past month, and -8.77 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was Lake Alan Henry's lowest water level on record?

Lake Alan Henry's lowest surface elevation since it first filled (its first near-full reading in this series is from 2004) was 2,201.24 feet on September 5, 2014, per the daily record used by this site. As of September 8, 2026 the reservoir is 7.78 feet above that record low.

About this gauge

Lake Alan Henry is a Texas water-supply reservoir in the Brazos River basin. Water Data for Texas publishes a conservation pool elevation of 2,220.0 ft and a conservation capacity of 96,207 acre-feet, with daily water level and storage recorded since 1997-10-01.

Operator

Texas Water Development Board (Water Data for Texas)

Station

alan-henry

Measurements

Daily water level and conservation storage

River

Brazos River

State

Texas

Full pool reference

2,220.0 ft

Capacity basis

96,207 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

October 1, 1997 (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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