Amistad Reservoir is managed by International Boundary and Water Commission. Lake Insights displays its latest available elevation from International Boundary and Water Commission. Published reference elevations are listed below.
Lake Status
60.67 feet below full pool
−60.67 ft vs full pool
- 7-day trend
- Falling
- 7-day change
- Down 734.45 ft
- 30-day change
- Down 734.83 ft
- Last updated
- Sep 22 • 3:15 AM
Amistad Reservoir is currently 60.67 feet below full pool and has been falling over the past week. Readings show continued drawdown relative to full pool, with levels trending lower over the past week.
Watershed drought conditions
Val Verde County, TX · surrounding county from lake location
Moderate Drought
Moderate drought is affecting the watershed.
Severity
Weekly trend
Worsening
Compared with last week
Official drought
Yes
83.7% of the watershed is currently classified as official drought (D1+).
Expected impacts
- Stream inflows may run below normal
- Lake levels can decline faster between rain events
- Vegetation stress may increase over time
U.S. Drought Monitor · map date Sep 22, 2026. Updated weekly. droughtmonitor.unl.eduView drought map for Val Verde County, TX
Key Facts
Managing authority
Waterbody / project type
Full pool
Flood stage
Datum
Current-level source
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
- 1117.00 ft
- Flood stage
- 1140.00 ft
Published reference elevation. Not necessarily a fixed year-round target for every project.
Flood stage is not interchangeable with flood pool.
Current data source
Managing authority: International Boundary and Water Commission
Observation source used by Lake Insights: International Boundary and Water Commission
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 International Boundary and Water Commission, 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.
Common questions about Amistad Reservoir
- Who manages Amistad Reservoir?
- Amistad Reservoir is managed by International Boundary and Water Commission. Lake Insights reports published gauge readings; it does not operate the waterbody.
- What is full pool at Amistad Reservoir?
- The published full-pool elevation for Amistad Reservoir is 1117.00 ft (NGVD29). Full pool is a published reference elevation — not a prediction of today’s level.
- Where does Lake Insights get the level reading for Amistad Reservoir?
- Lake Insights displays the latest available elevation for Amistad Reservoir from International Boundary and Water Commission. The managing authority (International Boundary and Water Commission) may differ from the agency that publishes the observation used on this page.
- What datum is used for Amistad Reservoir?
- Elevations for Amistad Reservoir are referenced to NGVD29 (MSL).