Lower Granite Lake Water Level Today
Washington · near Pullman · Near full pool
- Elevation
- 736.64 ft
- From full pool
- −1.36 ft
- Percent of pool
- 72.8%
- 24-hour change
- +0.04 ft
- 7-day change
- −0.53 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Lower Granite Lake
Lower Granite Lake is 1.36 ft below full pool, at 736.64 ft, up 0.04 ft in the last 24 hours. That puts the lake at 72.8 percent of its conservation pool. The top of the flood pool is 9.9 ft higher, at 746.50 ft.
Over the last 7 days the level fell 0.53 ft, and over 30 days it rose 0.89 ft. In the 397 days of readings on this page the high was 737.39 ft on Sep 6, 2025 and the low was 733.32 ft on Aug 18, 2025, a range of 4.07 ft.
The reading is the U.S. Army Corps of Engineers gauge at Lower Granite Lock and Dam, near Pullman, taken Sep 21, 2026 and referenced to the NGVD29 datum. This page is rebuilt once a day from the agency feed; it is not a live gauge, so during a fast rise or a scheduled release check the USACE page for hourly values.
Lower Granite Lake pool elevations
| Current elevation | 736.64 ft |
|---|---|
| Full pool (top of conservation) | 738.00 ft |
| Top of flood pool | 746.50 ft |
| Bottom of conservation pool | 733.00 ft |
| Top of dam | 751.00 ft |
| Inflow | 16,900 cfs |
| Outflow | 16,300 cfs |
| 30-day change | +0.89 ft |
| 1-year high | 737.39 ft (Sep 6, 2025) |
| 1-year low | 733.32 ft (Aug 18, 2025) |
| Vertical datum | NGVD29 |
| Operating agency | U.S. Army Corps of Engineers, NWW district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in Washington
- Lake Roosevelt 1,283.60 ft, −6.40 ft from full
- Baker Lake 722.05 ft, +10.49 ft from full
- Howard A Hanson Lake 1,146.65 ft, −20.35 ft from full
- Lake Entiat 705.65 ft, −1.35 ft from full
- Lake Pateros 777.87 ft, −3.13 ft from full
- Little Goose Lake 636.63 ft, −1.37 ft from full
Lower Granite Lake level questions
What is the water level of Lower Granite Lake today?
Lower Granite Lake is at 736.64 ft as of Sep 21, 2026, −1.36 ft relative to full pool (738.00 ft). The 24-hour change is +0.04 ft.
What is full pool at Lower Granite Lake?
Full pool, the top of the conservation pool, is 738.00 ft (NGVD29). Above that, water is stored temporarily in the flood pool up to 746.50 ft. The bottom of the conservation pool is 733.00 ft.
Is Lower Granite Lake rising or falling?
Over the last 24 hours the level is +0.04 ft; over 7 days it fell 0.53 ft, and over 30 days it rose 0.89 ft.
Where does this Lower Granite Lake level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Lower Granite Lock and Dam. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.