Twin Buttes Reservoir: 7.2% full as of 2026-08-09
Historical Data
| Date | Percent Full |
Mean Water Level (ft) |
Reservoir Storage (acre-ft) |
Conservation Storage (acre-ft) |
Conservation Capacity (acre-ft) |
Surface Area (acres) |
|
|---|---|---|---|---|---|---|---|
| Today | 2026-08-09 | 7.2 | 1,898.97 | 16,974 | 13,225 | 182,454 | 1,292 |
| Yesterday | 2026-08-08 | 7.3 | 1,899.03 | 17,052 | 13,303 | 182,454 | 1,296 |
| 2 days ago | 2026-08-07 | 7.3 | 1,899.10 | 17,144 | 13,395 | 182,454 | 1,300 |
| 1 week ago | 2026-08-02 | 7.6 | 1,899.43 | 17,580 | 13,831 | 182,454 | 1,320 |
| 1 month ago | 2026-07-09 | 8.1 | 1,900.17 | 18,570 | 14,821 | 182,454 | 1,367 |
| 3 months ago | 2026-05-09 | 10.1 | 1,902.70 | 22,237 | 18,488 | 182,454 | 1,549 |
| 6 months ago | 2026-02-09 | 11.7 | 1,904.44 | 25,024 | 21,275 | 182,454 | 1,675 |
| 1 year ago | 2025-08-09 | 15.6 | 1,908.32 | 32,246 | 28,497 | 182,454 | 2,084 |
*
Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.
**
Values above, including today's are averaged conditions. For near real-time instantaneous water level, see table below or the interactive map viewer.
Most Recent Instantaneous Water Level
| Date/time |
Water Level (ft) |
Conservation Pool Elevation (ft) |
Height Above Conservation Pool (ft) |
|
|---|---|---|---|---|
| Most recent | 2026-08-09 18:00 | 1,898.94 | 1,940.20 | -41.26 |
| 1 hour prior | 2026-08-09 17:00 | 1,898.95 | 1,940.20 | -41.25 |
| 2 hours prior | 2026-08-09 16:00 | 1,898.95 | 1,940.20 | -41.25 |
| 6 hours prior | 2026-08-09 12:00 | 1,898.96 | 1,940.20 | -41.24 |
| 12 hours prior | 2026-08-09 06:00 | 1,898.99 | 1,940.20 | -41.21 |
| 24 hours prior | 2026-08-08 18:00 | 1,899.01 | 1,940.20 | -41.19 |
| 48 hours prior | 2026-08-07 18:00 | 1,899.08 | 1,940.20 | -41.12 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1963-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 1,885.00 ft above NGVD29 |
| Emergency spillway crest elevation | 1,969.10 ft above NGVD29 |
| Flood pool elevation | 1,969.10 ft above NGVD29 |
| Maximum design elevation | 1,985.00 ft above NGVD29 |
| Top of dam elevation | 1,991.00 ft above NGVD29 |
| Conservation pool elevation | 1,940.20 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1964-01-01 (source: USBR)
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| Data Source | USGS:08131200 |
| USGS Monitoring Location | USGS:08131200 |
Lake Location
