Reservoir · Texas · United States · USACE CWMS
Pat Mayse Lake
57.6% full
Capacity
233.25 hm³
Volume stored
135 hm³
Coordinates
33.853°N, 95.544°W
Last updated
2026-06-11
Current fill
57.6%vs 7 days ago
-0.1%losing
vs 1 year ago
+3.7%year-over-year
7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — 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: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 33.853, -95.544 · Open in Google Maps
About Pat Mayse Lake
As of June 11, 2026, Pat Mayse Lake is filled to 57.6% of its total capacity, holding roughly 135 hm³ of water out of a maximum 233 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts), and it is 3.7 points above its level on the same date a year earlier.
Across the readings we hold for Pat Mayse Lake — 329 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 51.9% (February 12, 2026) to a high of 73.1% (June 13, 2021). On average the reservoir is fullest around June and at its lowest around February.
It is operated by USACE primarily for multiple purposes. It lies within the Texas basin at 33.853°N, 95.544°W.
Key facts
- Current fill level
- 57.6%
- Water stored
- 135 hm³
- Total capacity
- 233 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▲ 3.7 pts
- Primary use
- Multipurpose
- River basin
- Texas
- Operator
- USACE
- Coordinates
- 33.853°N, 95.544°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 57.6% | 134 |
| 10 Jun 2026 | 57.7% | 135 |
| 9 Jun 2026 | 57.7% | 135 |
| 8 Jun 2026 | 57.4% | 134 |
| 7 Jun 2026 | 56.7% | 132 |
| 6 Jun 2026 | 56.3% | 131 |
| 5 Jun 2026 | 56.3% | 131 |
| 4 Jun 2026 | 56.4% | 131 |
| 3 Jun 2026 | 56.4% | 132 |
| 2 Jun 2026 | 56.5% | 132 |
| 1 Jun 2026 | 56.6% | 132 |
| 31 May 2026 | 56.6% | 132 |
Frequently asked questions
What is the current water level of Pat Mayse Lake?
As of June 11, 2026, Pat Mayse Lake is at 57.6% of its capacity, holding approximately 135 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Pat Mayse Lake reservoir full?
No. As of June 11, 2026, Pat Mayse Lake is within its normal operating range at 57.6% of its capacity, so it is not full.
Is the water level at Pat Mayse Lake rising or falling?
The level at Pat Mayse Lake has been broadly stable over the latest week on record (-0.1 points).
How much water can Pat Mayse Lake hold?
Pat Mayse Lake has a total capacity of 233 hm³.
Where is Pat Mayse Lake reservoir located?
Pat Mayse Lake is located in Texas, United States, within the Texas basin (coordinates 33.853°N, 95.544°W).
What is Pat Mayse Lake used for?
Pat Mayse Lake is used primarily for multiple purposes, and is managed by USACE.