Lake LBJ

Officially Lake Lyndon B. Johnson (Wirtz Dam)

Texas

Lake LBJ is managed by Lower Colorado River Authority (LCRA). Lake Insights displays its latest available elevation from Lower Colorado River Authority. Published reference elevations are listed below.

Lake Status

0.21 feet below full pool

−0.21 ft vs full pool

7-day trend
Rising
7-day change
Up 0.06 ft
30-day change
Up 0.16 ft
Last updated
1 hour ago

Lake LBJ is currently 0.21 feet below full pool and has risen slightly over the past week. Recent conditions indicate improving reservoir levels, although the lake remains below its normal operating elevation.

Watershed drought conditions

Llano County, TX · surrounding county from lake location

Abnormally Dry

The surrounding county is abnormally dry, which is not official drought.

Severity

NoneExtreme

Weekly trend

Stable

Compared with last week

Official drought

Yes

0.3% of the watershed is currently classified as official drought (D1+).

U.S. Drought Monitor · map date Sep 8, 2026. Updated weekly. droughtmonitor.unl.eduView drought map for Llano County, TX

Key Facts

Waterbody / project type

Reservoir

Full pool

825.00 ft

Current-level source

Lower Colorado River Authority

Why the level can change

General factors for reservoirs like this

These are common influences for this type of lake. They do not identify the cause of a specific current change unless an operator update confirms it.

  • Rainfall & inflows

    Rain and upstream river inflows can raise reservoir levels, especially after storms.

  • Downstream releases

    When an operator releases water through a dam, reservoir storage can fall and downstream flows can rise.

  • Flood-risk operations

    Some projects store or release water under flood-risk rules when conditions require it.

  • Water supply

    Some reservoirs support municipal, industrial, irrigation, or regional water-supply needs.

  • Hydropower

    Hydropower projects may pass water through turbines when generating electricity.

  • Seasonal weather

    Dry periods, heat, evaporation, and seasonal rainfall patterns can affect storage over weeks and months.

Published reference elevations

Full pool
825.00 ft

Published reference elevation. Not necessarily a fixed year-round target for every project.

Current data source

Managing authority: Lower Colorado River Authority (LCRA)

Observation source used by Lake Insights: Lower Colorado River Authority

Who manages the lake and who publishes the reading Lake Insights displays can differ. Lake Insights does not invent a source label from the managing authority alone.

General education

Shared background — not lake-specific facts

Lake Insights aggregates water level information from authoritative public sources such as the U.S. Army Corps of Engineers, NOAA, TVA, Bureau of Reclamation, power utilities, and other official lake operators. We preserve historical observations, calculate trends, and present lake conditions in a consistent format. For Lower Colorado River Authority, we link to the official source whenever it is available. Lake Insights does not predict future lake levels unless an official forecast has been published by the managing authority.

How we source lake data · Glossary

Common questions about Lake LBJ

Who manages Lake LBJ?
Lake LBJ is managed by Lower Colorado River Authority (LCRA). Lake Insights reports published gauge readings; it does not operate the waterbody.
What is full pool at Lake LBJ?
The published full-pool elevation for Lake LBJ is 825.00 ft. Full pool is a published reference elevation — not a prediction of today’s level.
Where does Lake Insights get the level reading for Lake LBJ?
Lake Insights displays the latest available elevation for Lake LBJ from Lower Colorado River Authority. The managing authority (Lower Colorado River Authority (LCRA)) may differ from the agency that publishes the observation used on this page.

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