Reservoir · Oklahoma · United States · USACE CWMS
W.D. Mayo LD14
96.4% full
Capacity
43.73 hm³
Volume stored
42 hm³
Coordinates
35.315°N, 94.560°W
Last updated
2026-07-30
Current fill
96.4%vs 7 days ago
+0.1%gaining
vs 1 year ago
-0.2%year-over-year
7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-07-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 35.315, -94.560 · Open in Google Maps
About W.D. Mayo LD14
As of July 30, 2026, W.D. Mayo LD14 is filled to 96.4% of its total capacity, holding roughly 42 hm³ of water out of a maximum 44 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.1 pts), and it sits close to where it was a year earlier.
Across the readings we hold for W.D. Mayo LD14 — 330 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 37.7% (January 24, 2022) to a high of 100.0% (July 4, 2026). On average the reservoir is fullest around May and at its lowest around November.
It is operated by USACE primarily for multiple purposes. It lies within the Oklahoma basin at 35.315°N, 94.560°W.
Key facts
- Current fill level
- 96.4%
- Water stored
- 42 hm³
- Total capacity
- 44 hm³
- 7-day change
- ▲ 0.1 pts
- Year-on-year
- ▼ 0.2 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 35.315°N, 94.560°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 96.4% | 42 |
| 29 Jul 2026 | 96.3% | 42 |
| 28 Jul 2026 | 98.5% | 43 |
| 27 Jul 2026 | 95.5% | 42 |
| 26 Jul 2026 | 96.9% | 42 |
| 25 Jul 2026 | 98.4% | 43 |
| 24 Jul 2026 | 96.9% | 42 |
| 23 Jul 2026 | 96.5% | 42 |
| 22 Jul 2026 | 96.6% | 42 |
| 21 Jul 2026 | 97.4% | 43 |
| 20 Jul 2026 | 98.9% | 43 |
| 19 Jul 2026 | 95.1% | 42 |
Frequently asked questions
What is the current water level of W.D. Mayo LD14?
As of July 30, 2026, W.D. Mayo LD14 is at 96.4% of its capacity, holding approximately 42 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is W.D. Mayo LD14 reservoir full?
W.D. Mayo LD14 is essentially full, sitting at 96.4% of capacity as of July 30, 2026.
Is the water level at W.D. Mayo LD14 rising or falling?
The level at W.D. Mayo LD14 has been broadly stable over the latest week on record (+0.1 points).
How much water can W.D. Mayo LD14 hold?
W.D. Mayo LD14 has a total capacity of 44 hm³.
Where is W.D. Mayo LD14 reservoir located?
W.D. Mayo LD14 is located in Oklahoma, United States, within the Oklahoma basin (coordinates 35.315°N, 94.560°W).
What is W.D. Mayo LD14 used for?
W.D. Mayo LD14 is used primarily for multiple purposes, and is managed by USACE.