Rathbun Reservoir Water Level Today
Iowa · near Oskaloosa · In the flood pool
- Elevation
- 905.81 ft
- From full pool
- +1.81 ft
- Percent of pool
- 103.9%
- 24-hour change
- +0.02 ft
- 7-day change
- +0.18 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Rathbun Reservoir
Rathbun Reservoir is 1.81 ft above full pool, at 905.81 ft, in its flood pool, up 0.02 ft in the last 24 hours. That puts the lake at 103.9 percent of its conservation pool. The top of the flood pool is 20.2 ft higher, at 926.00 ft.
Over the last 7 days the level rose 0.18 ft, and over 30 days it fell 0.11 ft. In the 399 days of readings on this page the high was 910.86 ft on Jun 16, 2026 and the low was 904.10 ft on Dec 22, 2025, a range of 6.76 ft.
The reading is the U.S. Army Corps of Engineers gauge at Rathbun Dam & Reservoir, near Oskaloosa, 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.
Rathbun Reservoir pool elevations
| Current elevation | 905.81 ft |
|---|---|
| Full pool (top of conservation) | 904.00 ft |
| Top of flood pool | 926.00 ft |
| Bottom of conservation pool | 857.00 ft |
| Top of dam | 946.00 ft |
| Inflow | 210 cfs |
| Outflow | 13 cfs |
| 30-day change | −0.11 ft |
| 1-year high | 910.86 ft (Jun 16, 2026) |
| 1-year low | 904.10 ft (Dec 22, 2025) |
| Vertical datum | LOCAL |
| Operating agency | U.S. Army Corps of Engineers, NWK district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in Iowa
- Lake Red Rock 747.17 ft, +5.17 ft from full
- Saylorville Lake 837.18 ft, +1.18 ft from full
Rathbun Reservoir level questions
What is the water level of Rathbun Reservoir today?
Rathbun Reservoir is at 905.81 ft as of Sep 21, 2026, +1.81 ft relative to full pool (904.00 ft). The 24-hour change is +0.02 ft.
What is full pool at Rathbun Reservoir?
Full pool, the top of the conservation pool, is 904.00 ft (LOCAL). Above that, water is stored temporarily in the flood pool up to 926.00 ft. The bottom of the conservation pool is 857.00 ft.
Is Rathbun Reservoir rising or falling?
Over the last 24 hours the level is +0.02 ft; over 7 days it rose 0.18 ft, and over 30 days it fell 0.11 ft.
Where does this Rathbun Reservoir level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Rathbun Dam & Reservoir. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.