Reservoir · Texas · United States · BOR RISE
Twin Buttes Reservoir
Twin Buttes Reservoir and Dam
7.6% full
Capacity
229.69 hm³
Volume stored
17 hm³
Coordinates
31.377°N, 100.534°W
Last updated
2026-09-09
Current fill
7.6%vs 7 days ago
-0.3%losing
vs 1 year ago
-8.5%year-over-year
7-day trend
→stable
Data source: BOR RISE — US Bureau of Reclamation — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-09-09.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 31.377, -100.534 · Open in Google Maps
About Twin Buttes Reservoir
As of September 9, 2026, Twin Buttes Reservoir is filled to 7.6% of its total capacity, holding roughly 17 hm³ of water out of a maximum 230 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has held broadly steady (-0.3 pts), and it is 8.5 points below its level on the same date a year earlier.
Across the readings we hold for Twin Buttes Reservoir — 1824 data points between September 12, 2021 and September 9, 2026 — the level has ranged from a low of 7.6% (September 8, 2026) to a high of 53.0% (September 12, 2021). On average the reservoir is fullest around October and at its lowest around August.
It is operated by BOR primarily for multiple purposes. It lies within the Texas basin at 31.377°N, 100.534°W.
Key facts
- Current fill level
- 7.6%
- Water stored
- 17 hm³
- Total capacity
- 230 hm³
- 7-day change
- ▼ 0.3 pts
- Year-on-year
- ▼ 8.5 pts
- Primary use
- Multipurpose
- River basin
- Texas
- Operator
- BOR
- Coordinates
- 31.377°N, 100.534°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 7.6% | 17 |
| 8 Sep 2026 | 7.6% | 18 |
| 7 Sep 2026 | 7.7% | 18 |
| 6 Sep 2026 | 7.7% | 18 |
| 5 Sep 2026 | 7.7% | 18 |
| 4 Sep 2026 | 7.8% | 18 |
| 3 Sep 2026 | 7.8% | 18 |
| 2 Sep 2026 | 7.9% | 18 |
| 1 Sep 2026 | 8.0% | 18 |
| 31 Aug 2026 | 8.0% | 18 |
| 30 Aug 2026 | 8.1% | 19 |
| 29 Aug 2026 | 8.1% | 19 |