Reservoir · Texas · United States · BOR RISE
Choke Canyon Reservoir
Choke Canyon Reservoir and Dam
21.2% full
Capacity
880.85 hm³
Volume stored
187 hm³
Coordinates
28.467°N, 98.167°W
Last updated
2026-09-09
Current fill
21.2%vs 7 days ago
-0.4%losing
vs 1 year ago
+10.4%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. 28.467, -98.167 · Open in Google Maps
About Choke Canyon Reservoir
As of September 9, 2026, Choke Canyon Reservoir is filled to 21.2% of its total capacity, holding roughly 187 hm³ of water out of a maximum 881 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.4 pts), and it is 10.4 points above its level on the same date a year earlier.
Across the readings we hold for Choke Canyon Reservoir — 1943 data points between September 12, 2021 and September 9, 2026 — the level has ranged from a low of 6.6% (May 17, 2026) to a high of 47.4% (September 12, 2021). On average the reservoir is fullest around October and at its lowest around February.
It is operated by BOR primarily for multiple purposes. It lies within the Texas basin at 28.467°N, 98.167°W.
Key facts
- Current fill level
- 21.2%
- Water stored
- 187 hm³
- Total capacity
- 881 hm³
- 7-day change
- ▼ 0.4 pts
- Year-on-year
- ▲ 10.4 pts
- Primary use
- Multipurpose
- River basin
- Texas
- Operator
- BOR
- Coordinates
- 28.467°N, 98.167°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 21.2% | 187 |
| 8 Sep 2026 | 21.3% | 188 |
| 7 Sep 2026 | 21.3% | 188 |
| 6 Sep 2026 | 21.4% | 188 |
| 5 Sep 2026 | 21.4% | 189 |
| 4 Sep 2026 | 21.5% | 189 |
| 3 Sep 2026 | 21.5% | 189 |
| 2 Sep 2026 | 21.6% | 190 |
| 1 Sep 2026 | 21.6% | 190 |
| 31 Aug 2026 | 21.6% | 191 |
| 30 Aug 2026 | 21.7% | 191 |
| 29 Aug 2026 | 21.7% | 192 |