Stillhouse Hollow Lake is managed by U.S. Army Corps of Engineers. Lake Insights displays its latest available elevation from Texas Water Development Board. Published reference elevations are listed below.
Lake Status
0.73 feet below full pool
−0.73 ft vs full pool
- 7-day trend
- Falling
- 7-day change
- Down 0.15 ft
- 30-day change
- Down 0.78 ft
- Last updated
- 11 hours ago
Stillhouse Hollow Lake is currently 0.73 feet below full pool and has fallen slightly over the past week. Readings show continued drawdown relative to full pool, with levels trending lower over the past week.
Watershed drought conditions
Bell County, TX · surrounding county from lake location
Severe Drought
Severe drought conditions are present.
Severity
Weekly trend
Worsening
Compared with last week
Official drought
Yes
100% of the watershed is currently classified as official drought (D1+).
Expected impacts
- Lower stream inflows
- Lake levels may decline faster
- Vegetation is becoming drier
- Minor increase in wildfire risk
U.S. Drought Monitor · map date Sep 8, 2026. Updated weekly. droughtmonitor.unl.eduView drought map for Bell County, TX
Key Facts
Managing authority
Waterbody / project type
Official purposes
Full pool
Flood stage
Datum
Current-level source
Project / NID identifier
Dam / watershed (NID design values)
Static design values from a confidently matched National Inventory of Dams record — not live gage readings.
- Normal storage
- 235,700 acre-ft
- Max storage
- 1.01M acre-ft
- Surface area at normal pool
- 6,430 acres
- Drainage area
- 1,319 sq mi
- Spillway capacity (design)
- 781,483 cfs
- Dam structure
- Earth · 200 ft high · completed 1968
- Hazard classification
- High
- Safety & inspection
- last inspection May 13, 2021 · EAP yes
National Inventory of Dams · matched record: Stillhouse Hollow Dam (TX00014)
How this lake is operated
- Documented project purposes (National Inventory of Dams): Flood Risk Reduction, Fish and Wildlife Pond, Recreation, Water Supply.
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
- 622.00 ft
- Flood stage
- 666.00 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: U.S. Army Corps of Engineers
Observation source used by Lake Insights: Texas Water Development Board
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 Texas Water Development Board, 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 Stillhouse Hollow Lake
- Who manages Stillhouse Hollow Lake?
- Stillhouse Hollow Lake is managed by U.S. Army Corps of Engineers. Lake Insights reports published gauge readings; it does not operate the waterbody.
- What is full pool at Stillhouse Hollow Lake?
- The published full-pool elevation for Stillhouse Hollow Lake is 622.00 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 Stillhouse Hollow Lake?
- Lake Insights displays the latest available elevation for Stillhouse Hollow Lake from Texas Water Development Board. The managing authority (U.S. Army Corps of Engineers) may differ from the agency that publishes the observation used on this page.
- What datum is used for Stillhouse Hollow Lake?
- Elevations for Stillhouse Hollow Lake are referenced to NGVD29 (MSL).
- What are the documented purposes of Stillhouse Hollow Lake?
- Documented purposes for Stillhouse Hollow Lake (National Inventory of Dams): Flood Risk Reduction, Fish and Wildlife Pond, Recreation, Water Supply.