Cold Brook Reservoir Water Level Today
South Dakota · near Hot Springs · At full pool
- Elevation
- 3,585.27 ft
- From full pool
- +0.27 ft
- Percent of pool
- 100.7%
- 24-hour change
- −0.04 ft
- 7-day change
- +0.12 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Cold Brook Reservoir
Cold Brook Reservoir is at full pool, 3,585.27 ft, down 0.04 ft in the last 24 hours. That puts the lake at 100.7 percent of its conservation pool. The top of the flood pool is 66.1 ft higher, at 3,651.40 ft.
Over the last 7 days the level rose 0.12 ft, and over 30 days it rose 0.10 ft. In the 400 days of readings on this page the high was 3,585.30 ft on Sep 21, 2026 and the low was 3,585.11 ft on Aug 22, 2025, a range of 0.19 ft.
The reading is the U.S. Army Corps of Engineers gauge at Cold Brook Dam & Reservoir, near Hot Springs, 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.
Cold Brook Reservoir pool elevations
| Current elevation | 3,585.27 ft |
|---|---|
| Full pool (top of conservation) | 3,585.00 ft |
| Top of flood pool | 3,651.40 ft |
| Bottom of conservation pool | 3,545.00 ft |
| Top of dam | 3,675.00 ft |
| Inflow | 6 cfs |
| Outflow | 0 cfs |
| 30-day change | +0.10 ft |
| 1-year high | 3,585.30 ft (Sep 21, 2026) |
| 1-year low | 3,585.11 ft (Aug 22, 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 South Dakota
- Lake Oahe 1,592.17 ft, −15.33 ft from full
- Lake Francis Case 1,353.60 ft, +3.60 ft from full
- Lewis and Clark Lake 1,207.51 ft, +3.01 ft from full
- Lake Sharpe 1,420.87 ft, +0.87 ft from full
- Cottonwood Springs Reservoir 3,848.73 ft, −26.27 ft from full
- Pactola Reservoir 4,558.11 ft, −22.09 ft from full
Cold Brook Reservoir level questions
What is the water level of Cold Brook Reservoir today?
Cold Brook Reservoir is at 3,585.27 ft as of Sep 21, 2026, +0.27 ft relative to full pool (3,585.00 ft). The 24-hour change is −0.04 ft.
What is full pool at Cold Brook Reservoir?
Full pool, the top of the conservation pool, is 3,585.00 ft (LOCAL). Above that, water is stored temporarily in the flood pool up to 3,651.40 ft. The bottom of the conservation pool is 3,545.00 ft.
Is Cold Brook Reservoir rising or falling?
Over the last 24 hours the level is −0.04 ft; over 7 days it rose 0.12 ft, and over 30 days it rose 0.10 ft.
Where does this Cold Brook Reservoir level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Cold Brook Dam & Reservoir. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.