New Terrell City Lake Water Level Today - 493.73 ft, 25.6% Full

Trinity River · Texas - updated daily from official gauges

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

• New Terrell City Lake is 25.6% full - very low on this site's capacity scale - as of September 8, 2026. Surface elevation 493.73 feet, storage 2,196 acre-feet (capacity basis 8,583 acre-feet), per Texas Water Development Board data.
• That elevation is 2.17 feet above its record low of 491.56 ft (October 24, 2023), in a daily record going back to April 22, 1999 (TWDB's period of record for this reservoir).
• Storage is 36% of the September 8 average across 27 years of record.
• New Terrell City Lake is falling: elevation changed -0.09 ft over the past week, -0.67 ft over the past month, and -0.51 ft over the past year, per Texas Water Development Board data.

New Terrell City Lake is within 2.17 feet of the lowest surface elevation in its daily record, set on October 24, 2023.

New Terrell City Lake vs its record low

In the daily record used by this site (going back to April 22, 1999 (TWDB's period of record for this reservoir)), New Terrell City Lake's lowest surface elevation was 491.56 feet on October 24, 2023, when storage was 1,469 acre-feet. As of September 8, 2026, New Terrell City Lake is at 493.73 feet - 2.17 feet above that record. The record high in the same series was 507.20 ft on October 14, 2009.

New Terrell City Lake storage in context

New Terrell City Lake water level, past 12 months

25.6% full at the latest reading - across the past 12 months it ranged from 23.8% (January 19, 2026) to 34.6% (June 9, 2026). Percent full is storage against the 8,583-acre-foot capacity basis, not a share of the elevation plotted above.

New Terrell City Lake elevation, full record

25.6% full at the latest reading - across the storage record since April 22, 1999 it ranged from 17.1% (October 24, 2023) to 100.0% (February 24, 2023). Percent full is storage against the 8,583-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 New Terrell City Lake today?

As of September 8, 2026, New Terrell City Lake's surface elevation is 493.73 feet, with 2,196 acre-feet in storage - 25.6% of the 8,583 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is New Terrell City Lake?

New Terrell City Lake is 25.6% full as of September 8, 2026. Its storage is 36% of the September 8 average across its record since 1999. Source: Water Data for Texas (TWDB) daily data.

When was New Terrell City Lake last full?

New Terrell City Lake was last at or above 95% of its 8,583 acre-foot capacity basis on March 5, 2023. As of September 8, 2026 it is 25.6% full. Source: Water Data for Texas (TWDB) daily data.

Is New Terrell City Lake rising or falling?

New Terrell City Lake is falling: its elevation changed -0.09 feet over the week ending September 8, 2026, -0.67 ft over the past month, and -0.51 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was New Terrell City Lake's lowest water level on record?

New Terrell City Lake's lowest surface elevation in the daily record since April 22, 1999 was 491.56 feet on October 24, 2023, per the daily record used by this site. As of September 8, 2026 the reservoir is 2.17 feet above that record low.

About this gauge

New Terrell City Lake is a Texas water-supply reservoir in the Trinity River basin. Water Data for Texas publishes a conservation pool elevation of 1,969.0 ft and a conservation capacity of 8,583 acre-feet, with daily water level and storage recorded since 1999-04-22.

Operator

Texas Water Development Board (Water Data for Texas)

Station

new-terrell-city

Measurements

Daily water level and conservation storage

River

Trinity River

State

Texas

Full pool reference

1,969.0 ft

Capacity basis

8,583 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

April 22, 1999 (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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