Angostura Reservoir Water Level Today
Daily level, distance to full pool and history for Angostura Reservoir, on the Cheyenne River in South Dakota.
Updated · Source: Bureau of ReclamationReclamation
Water level
3,169.85ft
- 17.35 ftbelow full pool (3,187.2 ft)
- +0.05 ftin 24 h+0.24 ft in 7 days+0.55 ft in 30 days
- Full pool
- 1 yr ago
Is Angostura Reservoir full?
No. Angostura Reservoir is 17.35 ft below full pool (3,187.2 ft). It is 1.75 ft lower than a year ago (3,171.60 ft on Nov 8, 2025).
Angostura Reservoir level history
View data table
| Date | Level (ft) |
|---|---|
| Nov 8, 2026 | 3,169.85 |
| Nov 7, 2026 | 3,169.80 |
| Nov 6, 2026 | 3,169.76 |
| Nov 5, 2026 | 3,169.75 |
| Nov 4, 2026 | 3,169.73 |
| Nov 3, 2026 | 3,169.71 |
| Nov 2, 2026 | 3,169.70 |
| Nov 1, 2026 | 3,169.61 |
| Oct 31, 2026 | 3,169.61 |
| Oct 30, 2026 | 3,169.57 |
| Oct 29, 2026 | 3,169.56 |
| Oct 28, 2026 | 3,169.55 |
| Oct 27, 2026 | 3,169.54 |
| Oct 26, 2026 | 3,169.52 |
| Oct 25, 2026 | 3,169.49 |
| Oct 24, 2026 | 3,169.48 |
| Oct 23, 2026 | 3,169.48 |
| Oct 22, 2026 | 3,169.47 |
| Oct 21, 2026 | 3,169.45 |
| Oct 20, 2026 | 3,169.43 |
| Oct 19, 2026 | 3,169.41 |
| Oct 18, 2026 | 3,169.40 |
| Oct 17, 2026 | 3,169.40 |
| Oct 16, 2026 | 3,169.40 |
| Oct 15, 2026 | 3,169.38 |
| Oct 14, 2026 | 3,169.34 |
| Oct 13, 2026 | 3,169.34 |
| Oct 12, 2026 | 3,169.36 |
| Oct 11, 2026 | 3,169.34 |
| Oct 10, 2026 | 3,169.30 |
| Oct 9, 2026 | 3,169.30 |
Full pool 3,187.2 ftLow 3,166.12 ft · Sep 4High 3,175.53 ft · May 9
View data table
| Month | Low (ft) | High (ft) |
|---|---|---|
| Nov 2026 | 3,169.61 | 3,169.85 |
| Oct 2026 | 3,169.21 | 3,169.57 |
| Sep 2026 | 3,166.12 | 3,169.15 |
| Aug 2026 | 3,166.42 | 3,169.24 |
| Jul 2026 | 3,169.49 | 3,172.87 |
| Jun 2026 | 3,173.10 | 3,173.98 |
| May 2026 | 3,173.96 | 3,175.53 |
| Apr 2026 | 3,175.10 | 3,175.42 |
| Mar 2026 | 3,174.43 | 3,175.04 |
| Feb 2026 | 3,173.63 | 3,174.35 |
| Jan 2026 | 3,172.99 | 3,173.56 |
| Dec 2025 | 3,172.19 | 3,172.93 |
| Nov 2025 | 3,171.60 | 3,172.13 |
Full pool 3,187.2 ft
View data table
| Year | Low (ft) | High (ft) |
|---|---|---|
| 2026 | 3,166.24 | 3,175.51 |
| 2025 | 3,170.43 | 3,180.10 |
| 2024 | 3,176.50 | 3,186.68 |
| 2023 | 3,172.25 | 3,183.06 |
| 2022 | 3,170.61 | 3,180.96 |
| 2021 | 3,175.07 | 3,183.49 |
| 2020 | 3,176.57 | 3,185.62 |
| 2019 | 3,182.08 | 3,186.90 |
| 2018 | 3,179.37 | 3,186.73 |
| 2017 | 3,177.35 | 3,185.87 |
| 2016 | 3,179.60 | 3,180.49 |
Full pool 3,187.2 ftRecord high 3,189.37 ft · May 20, 1978Record low 3,162.90 ft · Sep 28, 1960
View data table
| Decade | Low (ft) | High (ft) |
|---|---|---|
| 2020s | 3,166.42 | 3,186.27 |
| 2010s | 3,173.95 | 3,187.27 |
| 2000s | 3,163.47 | 3,186.84 |
| 1990s | 3,167.83 | 3,187.12 |
| 1980s | 3,165.89 | 3,187.26 |
| 1970s | 3,169.20 | 3,189.37 |
| 1960s | 3,162.99 | 3,187.61 |
| 1950s | 3,167.82 | 3,187.91 |
- Angostura Reservoir level
- Full pool 3,187.2 ft
- Above full pool
Angostura Reservoir on Nov 8 in past years
Lake facts
- Record high
- 3,189.37 ftMay 20, 1978
- Record low
- 3,162.90 ftSep 28, 1960
- Data since
- Apr 1, 1952
- Dam
- Angostura Damcompleted 1949
- River
- Cheyenne River
- Owned by
- Bureau of Reclamation
- Dam location
- Fall River County
- Gauge location
- 43.3433, −103.4383
Dam, river and owner from the National Inventory of Dams (USACE). Records cover Apr 1, 1952 to today (daily averages).
Angostura Reservoir map and depth
- Dam and level gauge
- Average depth when full
- about 31 ftcapacity ÷ surface area
- Surface area
- about 4,010 acresmeasured on the OpenStreetMap outline
- Height of Angostura Dam
- 193 ftNational Inventory of Dams
The outline shows the mapped shoreline, not today’s water line: when the lake is low, the water stands back from it.
Weather on the lake
- Today59°FHighLow 39°FE 3–7 mphMostly Sunny
- Tonight39°FLowNW 2–9 mphPartly Cloudy
- Tuesday65°FHighLow 38°FW 10–17 mphMostly Sunny
- Wednesday60°FHighLow 37°FNW 6–16 mphSunny
- Thursday59°FHighLow 35°FN 8 mphSunny
- Friday63°FHighLow 41°FW 5–9 mphSunny
- Saturday66°FHighLow 41°FW 5–13 mphSunny
Forecast: National Weather Service for the dam area (43.34, −103.44). Wind speeds are forecasts, not measurements.
Nearby lakes
Quick answers
What is the full pool level of Angostura Reservoir?
3,187.2 ft above mean sea level, the top of its conservation pool. Above it, water is released or flows over the spillway of Angostura Dam.
How much does Angostura Reservoir need to be full?
Angostura Reservoir needs 17.35 ft more water to reach full pool (3,187.2 ft), as of Nov 8, 2026.
How deep is Angostura Reservoir?
Angostura Reservoir is about 31 ft deep on average when full: 123,048 acre-ft of storage spread over about 4,010 acres of surface. As in most reservoirs, the deepest water is in the old river channel near Angostura Dam.
Is Angostura Reservoir rising or falling?
It is rising: +0.24 ft in the last 7 days and +0.05 ft in 24 hours, to 3,169.85 ft on Nov 8, 2026 (Bureau of Reclamation).
When was Angostura Reservoir last full?
It was last at or above full pool (3,187.2 ft) on Jun 7, 2015. On Nov 8, 2026 it was 17.35 ft below.
What was the highest level ever recorded?
Angostura Reservoir reached 3,189.37 ft on May 20, 1978. The lowest was 3,162.90 ft on Sep 28, 1960 (Reclamation data since 1952).
How much has Angostura Reservoir changed in the last year?
In the last 12 months it ranged from 3,166.12 ft (Sep 4, 2026) to 3,175.53 ft (May 9, 2026), a swing of 9.41 ft.
How often is this page updated?
This page is updated every day with the daily reading of the Bureau of Reclamation, which is usually published one or two days later. The last reading is from Nov 8, 2026.
Where this data comes from
Daily elevation from the Bureau of Reclamation (data.usbr.gov). Updated once a day. Weather from the National Weather Service. Dam details from the National Inventory of Dams.
Lake Levels Daily is an independent site, not affiliated with TWDB, LCRA, USACE, USGS, NOAA, TVA or any lake operator. Check official sources before making safety decisions.