Coleto Creek Reservoir Water Level Today - 94.56 ft, 74.1% Full

Guadalupe River · Texas - updated daily from official gauges

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

• Coleto Creek Reservoir is 74.1% full - moderate on this site's capacity scale - as of September 8, 2026. Surface elevation 94.56 feet, storage 23,006 acre-feet (capacity basis 31,040 acre-feet), per Texas Water Development Board data.
• That elevation is its lowest September reading since 2020, and 1.79 feet above its record low of 92.77 ft (January 8, 2015), in a daily record going back to November 6, 1998 (TWDB's period of record for this reservoir).
• Storage is 85% of the September 8 average across 28 years of record.
• Coleto Creek Reservoir is falling: elevation changed -0.19 ft over the past week, -0.79 ft over the past month, and -2.20 ft over the past year, per Texas Water Development Board data.

Coleto Creek Reservoir has fallen 2.20 feet in twelve months, and now sits 1.79 feet above its record low.

Coleto Creek Reservoir vs its record low

In the daily record used by this site (going back to November 6, 1998 (TWDB's period of record for this reservoir)), Coleto Creek Reservoir's lowest surface elevation was 92.77 feet on January 8, 2015, when storage was 19,356 acre-feet. As of September 8, 2026, Coleto Creek Reservoir is at 94.56 feet - 1.79 feet above that record. The record high in the same series was 99.48 ft on November 21, 2004.

Coleto Creek Reservoir storage in context

Coleto Creek Reservoir water level, past 12 months

74.1% full at the latest reading - across the past 12 months it ranged from 74.1% (September 8, 2026) to 90.6% (September 8, 2025). Percent full is storage against the 31,040-acre-foot capacity basis, not a share of the elevation plotted above.

Coleto Creek Reservoir elevation, full record

74.1% full at the latest reading - across the storage record since October 2, 1986 it ranged from 62.4% (January 8, 2015) to 100.0% (July 21, 2025). Percent full is storage against the 31,040-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 Coleto Creek Reservoir today?

As of September 8, 2026, Coleto Creek Reservoir's surface elevation is 94.56 feet, with 23,006 acre-feet in storage - 74.1% of the 31,040 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.

How full is Coleto Creek Reservoir?

Coleto Creek Reservoir is 74.1% full as of September 8, 2026. Its storage is 85% of the September 8 average across its record since 1998. Source: Water Data for Texas (TWDB) daily data.

When was Coleto Creek Reservoir last full?

Coleto Creek Reservoir was last at or above 95% of its 31,040 acre-foot capacity basis on August 13, 2025. As of September 8, 2026 it is 74.1% full. Source: Water Data for Texas (TWDB) daily data.

Is Coleto Creek Reservoir rising or falling?

Coleto Creek Reservoir is falling: its elevation changed -0.19 feet over the week ending September 8, 2026, -0.79 ft over the past month, and -2.20 feet over the past year. Source: Water Data for Texas (TWDB) daily data.

What was Coleto Creek Reservoir's lowest water level on record?

Coleto Creek Reservoir's lowest surface elevation in the daily record since November 6, 1998 was 92.77 feet on January 8, 2015, per the daily record used by this site. As of September 8, 2026 the reservoir is 1.79 feet above that record low.

About this gauge

Coleto Creek Reservoir is a Texas water-supply reservoir in the Guadalupe River basin. Water Data for Texas publishes a conservation pool elevation of 98.0 ft and a conservation capacity of 31,040 acre-feet, with daily water level and storage recorded since 1986-10-02.

Operator

Texas Water Development Board (Water Data for Texas)

Station

coleto-creek

Measurements

Daily water level and conservation storage

River

Guadalupe River

State

Texas

Full pool reference

98.0 ft

Capacity basis

31,040 acre-feet (Water Data for Texas (TWDB) conservation capacity)

Period of record

November 6, 1998 (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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