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.

504.05 ft -0.12 ft in 7 days

Reading of Sep 9, 2026 · source: USGS

100% of conservation capacityFull pool 504.0 ft
Full pool 504.0 ft502.4504.7507.0509.3511.62025-092026-032026-09
━ Water surface elevation (ft)- - - Full pool

Recent readings

Daily values from USGS gauge 08105600.

DateElevation (ft)Change
2026-09-08504.06-0.03
2026-09-07504.09-0.01
2026-09-06504.10-0.01
2026-09-05504.11-0.02
2026-09-04504.13-0.01
2026-09-03504.14-0.02
2026-09-02504.16-0.02
2026-09-01504.18

Operating levels set by the Corps of Engineers

Reference elevations published by the SWF district for this project.

Reference levelElevation
Bottom of Inactive464.1 ft
Bottom of Inactive457.0 ft
Design Capacity550.3 ft
Maximum Tailwater481.5 ft
Streambed440.0 ft
Top of Conservation504.0 ft
Top of Dam555.0 ft
Top of Flood528.0 ft
Top of Inactive491.9 ft
Top of Inactive457.0 ft
Bottom of Inactive464.1 ft
Bottom of Inactive457.0 ft
Design Capacity550.3 ft
Maximum Tailwater481.5 ft
Spillway Crest528.0 ft
Streambed440.0 ft
Top of Conservation504.0 ft
Top of Dam555.0 ft
Top of Flood528.0 ft
Top of Inactive491.9 ft
Top of Inactive457.0 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.

Over the last 400 days the gauge has ranged from 503.31 ft (2025-10-24) to 510.67 ft (2026-06-08). These are the limits of that window, not all-time records.

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.