Twin Buttes Reservoir: 5.3% full as of 2026-09-19
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 | 2026-09-19 | 5.3 | 1,896.04 | 13,475 | 9,726 | 182,454 | 1,113 |
| Yesterday | 2026-09-18 | 5.4 | 1,896.08 | 13,521 | 9,772 | 182,454 | 1,116 |
| 2 days ago | 2026-09-17 | 5.4 | 1,896.15 | 13,600 | 9,851 | 182,454 | 1,120 |
| 1 week ago | 2026-09-12 | 5.6 | 1,896.52 | 14,019 | 10,270 | 182,454 | 1,143 |
| 1 month ago | 2026-08-19 | 6.7 | 1,898.17 | 15,970 | 12,221 | 182,454 | 1,243 |
| 3 months ago | 2026-06-19 | 9.2 | 1,901.53 | 20,491 | 16,742 | 182,454 | 1,465 |
| 6 months ago | 2026-03-19 | 11.1 | 1,903.87 | 24,080 | 20,331 | 182,454 | 1,634 |
| 1 year ago | 2025-09-19 | 14.0 | 1,906.82 | 29,260 | 25,511 | 182,454 | 1,917 |
*
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 | 2026-09-19 03:00 | 1,896.04 | 1,940.20 | -44.16 |
| 1 hour prior | 2026-09-19 02:00 | 1,896.04 | 1,940.20 | -44.16 |
| 2 hours prior | 2026-09-19 01:00 | 1,896.05 | 1,940.20 | -44.15 |
| 6 hours prior | 2026-09-18 21:00 | 1,896.05 | 1,940.20 | -44.15 |
| 12 hours prior | 2026-09-18 15:00 | 1,896.07 | 1,940.20 | -44.13 |
| 24 hours prior | 2026-09-18 03:00 | 1,896.10 | 1,940.20 | -44.10 |
| 48 hours prior | 2026-09-17 03:00 | 1,896.18 | 1,940.20 | -44.02 |
*
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
