Ririe Reservoir Water Level Today
Idaho · near Idaho Falls · Below full pool
- Elevation
- 5,064.52 ft
- From full pool
- −41.48 ft
- Percent of pool
- 61.9%
- 24-hour change
- −0.03 ft
- 7-day change
- −2.49 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Ririe Reservoir
Ririe Reservoir is 41.48 ft below full pool, at 5,064.52 ft, down 0.03 ft in the last 24 hours. That puts the lake at 61.9 percent of its conservation pool. The top of the flood pool is 54.4 ft higher, at 5,118.90 ft.
Over the last 7 days the level fell 2.49 ft, and over 30 days it fell 19.54 ft. In the 396 days of readings on this page the high was 5,100.18 ft on Aug 18, 2025 and the low was 5,064.52 ft on Sep 21, 2026, a range of 35.66 ft.
The reading is the U.S. Army Corps of Engineers gauge at Ririe Dam on Willow Creek, near Idaho Falls, 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.
Ririe Reservoir pool elevations
| Current elevation | 5,064.52 ft |
|---|---|
| Full pool (top of conservation) | 5,106.00 ft |
| Top of flood pool | 5,118.90 ft |
| Bottom of conservation pool | 4,997.00 ft |
| Top of dam | 5,128.00 ft |
| Inflow | 29 cfs |
| Outflow | 44 cfs |
| 30-day change | −19.54 ft |
| 1-year high | 5,100.18 ft (Aug 18, 2025) |
| 1-year low | 5,064.52 ft (Sep 21, 2026) |
| 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 Idaho
- Lucky Peak Lake 2,960.65 ft, −94.35 ft from full
- Dworshak Reservoir 1,520.63 ft, −79.37 ft from full
- Anderson Ranch Lake 4,152.42 ft, −41.58 ft from full
- Arrowrock Lake 3,129.91 ft, −85.84 ft from full
- Lake Pend Oreille 2,062.30 ft, −0.20 ft from full
- Little Wood Reservoir 5,183.68 ft, −48.32 ft from full
Ririe Reservoir level questions
What is the water level of Ririe Reservoir today?
Ririe Reservoir is at 5,064.52 ft as of Sep 21, 2026, −41.48 ft relative to full pool (5,106.00 ft). The 24-hour change is −0.03 ft.
What is full pool at Ririe Reservoir?
Full pool, the top of the conservation pool, is 5,106.00 ft (NGVD29). Above that, water is stored temporarily in the flood pool up to 5,118.90 ft. The bottom of the conservation pool is 4,997.00 ft.
Is Ririe Reservoir rising or falling?
Over the last 24 hours the level is −0.03 ft; over 7 days it fell 2.49 ft, and over 30 days it fell 19.54 ft.
Where does this Ririe Reservoir level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Ririe Dam on Willow Creek. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.