Mountain Creek Lake Water Level Today - 456.93 ft, 99.3% Full

Trinity River · Texas - updated daily from official gauges

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

• Mountain Creek Lake is 99.3% full - effectively full on this site's capacity scale - as of September 8, 2026. Surface elevation 456.93 feet, storage 22,691 acre-feet (capacity basis 22,850 acre-feet), per Texas Water Development Board data.
• That elevation is its lowest September reading since 2023, and 2.49 feet above its record low of 454.44 ft (September 12, 1998), in a daily record going back to October 2, 1987 (TWDB's period of record for this reservoir).
• Storage is 105% of the September 8 average across 38 years of record.
• Mountain Creek Lake is falling: elevation changed -0.07 ft over the past week, -0.39 ft over the past month, and -0.63 ft over the past year, per Texas Water Development Board data.

Mountain Creek Lake is holding near the top of its operating range at 99.3% of capacity, -0.63 ft over the past twelve months.

Mountain Creek Lake operating range

Mountain Creek Lake is operated within a narrow band rather than drawn down and refilled over years. As of September 8, 2026 it sits 0.07 feet below its 457.0 ft full-pool reference. Over the past two years the daily record ranges from 456.57 ft (October 29, 2024) to 458.42 ft (July 9, 2025) - a band of 1.85 feet. The highest reading in the full record is 458.74 ft on October 26, 2023.

Storage above the full-pool reference is flood control space, not supply. A reservoir reading at or near 100% of its conservation capacity is being operated normally - it is not a surplus, and the operator may release water to hold that space.

Mountain Creek Lake storage in context

Mountain Creek Lake water level, past 12 months

99.3% full at the latest reading - across the past 12 months it ranged from 98.8% (October 23, 2025) to 100.0% (September 1, 2026). Percent full is storage against the 22,850-acre-foot capacity basis, not a share of the elevation plotted above.

Mountain Creek Lake elevation, full record

99.3% full at the latest reading - across the storage record since October 2, 1960 it ranged from 61.8% (October 19, 1972) to 100.0% (September 1, 2026). Percent full is storage against the 22,850-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 Mountain Creek Lake today?

As of September 8, 2026, Mountain Creek Lake's surface elevation is 456.93 feet, with 22,691 acre-feet in storage - 99.3% of the 22,850 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Mountain Creek Lake?

Mountain Creek Lake is 99.3% full as of September 8, 2026. Its storage is 105% of the September 8 average across its record since 1987. Source: Water Data for Texas (TWDB) daily data.

When was Mountain Creek Lake last full?

Mountain Creek Lake was last at or above 95% of its 22,850 acre-foot capacity basis on September 8, 2026. As of September 8, 2026 it is 99.3% full. Source: Water Data for Texas (TWDB) daily data.

Is Mountain Creek Lake rising or falling?

Mountain Creek Lake is falling: its elevation changed -0.07 feet over the week ending September 8, 2026, -0.39 ft over the past month, and -0.63 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was Mountain Creek Lake's lowest water level on record?

Mountain Creek Lake's lowest surface elevation in the daily record since October 2, 1987 was 454.44 feet on September 12, 1998, per the daily record used by this site. As of September 8, 2026 the reservoir is 2.49 feet above that record low.

About this gauge

Mountain Creek Lake is a Texas water-supply reservoir in the Trinity River basin. Water Data for Texas publishes a conservation pool elevation of 457.0 ft and a conservation capacity of 22,850 acre-feet, with daily water level and storage recorded since 1960-10-02.

Operator

Texas Water Development Board (Water Data for Texas)

Station

mountain-creek

Measurements

Daily water level and conservation storage

River

Trinity River

State

Texas

Full pool reference

457.0 ft

Capacity basis

22,850 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

October 2, 1987 (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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