Tiber Reservoir Water Level Today
Montana · near Great Falls · Below full pool
- Elevation
- 2,988.17 ft
- From full pool
- −4.83 ft
- Percent of pool
- 81.8%
- 24-hour change
- −0.02 ft
- 7-day change
- −0.13 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Tiber Reservoir
Tiber Reservoir is 4.83 ft below full pool, at 2,988.17 ft, down 0.02 ft in the last 24 hours. That puts the lake at 81.8 percent of its conservation pool. The top of the flood pool is 24.3 ft higher, at 3,012.50 ft.
Over the last 7 days the level fell 0.13 ft, and over 30 days it fell 1.05 ft. In the 399 days of readings on this page the high was 2,993.70 ft on Jul 6, 2026 and the low was 2,979.55 ft on Nov 17, 2025, a range of 14.15 ft.
The reading is the U.S. Army Corps of Engineers gauge at Tiber Dam & Reservoir, near Great Falls, taken Sep 21, 2026 and referenced to the LOCAL 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.
Tiber Reservoir pool elevations
| Current elevation | 2,988.17 ft |
|---|---|
| Full pool (top of conservation) | 2,993.00 ft |
| Top of flood pool | 3,012.50 ft |
| Bottom of conservation pool | 2,966.40 ft |
| Top of dam | 3,026.00 ft |
| Inflow | 94 cfs |
| Outflow | 509 cfs |
| 30-day change | −1.05 ft |
| 1-year high | 2,993.70 ft (Jul 6, 2026) |
| 1-year low | 2,979.55 ft (Nov 17, 2025) |
| Vertical datum | LOCAL |
| Operating agency | U.S. Army Corps of Engineers, NWO district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in Montana
- Fort Peck Lake 2,222.45 ft, −11.55 ft from full
- Lake Koocanusa 2,444.76 ft, −14.24 ft from full
- Canyon Ferry Reservoir 3,785.41 ft, −11.59 ft from full
- Clark Canyon Reservoir 5,514.74 ft, −31.36 ft from full
- Flathead Lake 2,893.05 ft, +0.05 ft from full
- Yellowtail Reservoir 3,623.41 ft, −16.59 ft from full
Tiber Reservoir level questions
What is the water level of Tiber Reservoir today?
Tiber Reservoir is at 2,988.17 ft as of Sep 21, 2026, −4.83 ft relative to full pool (2,993.00 ft). The 24-hour change is −0.02 ft.
What is full pool at Tiber Reservoir?
Full pool, the top of the conservation pool, is 2,993.00 ft (LOCAL). Above that, water is stored temporarily in the flood pool up to 3,012.50 ft. The bottom of the conservation pool is 2,966.40 ft.
Is Tiber Reservoir rising or falling?
Over the last 24 hours the level is −0.02 ft; over 7 days it fell 0.13 ft, and over 30 days it fell 1.05 ft.
Where does this Tiber Reservoir level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Tiber Dam & Reservoir. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.