Water level
Granger Lake water level
Granger Lake is at 504.05 ft (-0.1 ft below the 504.0 ft full pool), about 100% full as of Sep 9, 2026. Live readings, trend, history and what the level means for swimming and boat ramps.
Recent readings
Daily values from USGS gauge 08105600.
| Date | Elevation (ft) | Change |
|---|---|---|
| 2026-09-08 | 504.06 | -0.03 |
| 2026-09-07 | 504.09 | -0.01 |
| 2026-09-06 | 504.10 | -0.01 |
| 2026-09-05 | 504.11 | -0.02 |
| 2026-09-04 | 504.13 | -0.01 |
| 2026-09-03 | 504.14 | -0.02 |
| 2026-09-02 | 504.16 | -0.02 |
| 2026-09-01 | 504.18 |
Operating levels set by the Corps of Engineers
Reference elevations published by the SWF district for this project.
| Reference level | Elevation |
|---|---|
| Bottom of Inactive | 464.1 ft |
| Bottom of Inactive | 457.0 ft |
| Design Capacity | 550.3 ft |
| Maximum Tailwater | 481.5 ft |
| Streambed | 440.0 ft |
| Top of Conservation | 504.0 ft |
| Top of Dam | 555.0 ft |
| Top of Flood | 528.0 ft |
| Top of Inactive | 491.9 ft |
| Top of Inactive | 457.0 ft |
| Bottom of Inactive | 464.1 ft |
| Bottom of Inactive | 457.0 ft |
| Design Capacity | 550.3 ft |
| Maximum Tailwater | 481.5 ft |
| Spillway Crest | 528.0 ft |
| Streambed | 440.0 ft |
| Top of Conservation | 504.0 ft |
| Top of Dam | 555.0 ft |
| Top of Flood | 528.0 ft |
| Top of Inactive | 491.9 ft |
| Top of Inactive | 457.0 ft |
What this level means
Station 08105600, Granger Lk nr Granger, TX, publishes the water surface elevation used here. The last value stored here, 504.05 ft, is from 2026-09-09. That put the reservoir at 100% of its conservation capacity. Conservation capacity is 51,822 acre-feet. The Corps of Engineers puts the top of the flood pool at 528.0 ft. Over the record shown on the level page the gauge has moved between 503.31 ft and 510.67 ft (low on 2025-10-24, high on 2026-06-08). The top of the dam sits at 555.0 ft. The conservation pool tops out at 504.0 ft. Beach width and ramp access both move with the pool, so the number above is worth a look first.
How this reading is taken
USGS gauge 08105600 measures the water surface and publishes the value continuously. This page stores the latest reading at build time and refreshes the record daily, so the figure above is a real measurement rather than a model or an estimate.
Full pool for Granger Lake is 504.0 ft, so the gap between the reading and that number is what the reservoir is missing.
Elevations are given in feet above the gauge datum used by the operating agency. Two lakes are only comparable with each other through how full they are, not through their raw elevation, because each dam sits at a different height.
Water level questions
What is the current water level at Granger Lake?
The latest reading is 504.05 ft, 0.1 ft above the 504.0 ft full pool, from USGS gauge 08105600.
How full is Granger Lake?
It was last reported at 100% of conservation capacity, holding 51,822 of 51,822 acre-feet.
What is full pool at Granger Lake?
Full pool is 504.0 ft. Water above that level is flood storage and is released as conditions allow.
Sources
Every figure on this page comes from one of these public sources.
