Reservoir · Oklahoma · United States · USACE CWMS
Newt Graham LD18
75.2% full
Capacity
28.99 hm³
Volume stored
22 hm³
Coordinates
36.058°N, 95.535°W
Last updated
2026-09-11
Current fill
75.2%vs 7 days ago
-0.4%losing
vs 1 year ago
N/A7-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: 2026-09-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 36.058, -95.535 · Open in Google Maps
About Newt Graham LD18
As of September 11, 2026, Newt Graham LD18 is filled to 75.2% of its total capacity, holding roughly 22 hm³ of water out of a maximum 29 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 (-0.4 pts).
Across the readings we hold for Newt Graham LD18 — 120 data points between May 14, 2026 and September 11, 2026 — the level has ranged from a low of 65.0% (June 26, 2026) to a high of 80.5% (June 23, 2026).
It is operated by USACE primarily for multiple purposes. It lies within the Oklahoma basin at 36.058°N, 95.535°W.
Key facts
- Current fill level
- 75.2%
- Water stored
- 22 hm³
- Total capacity
- 29 hm³
- 7-day change
- ▼ 0.4 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 36.058°N, 95.535°W
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 75.2% | 22 |
| 10 Sep 2026 | 76.0% | 22 |
| 9 Sep 2026 | 74.6% | 22 |
| 8 Sep 2026 | 75.1% | 22 |
| 7 Sep 2026 | 75.3% | 22 |
| 6 Sep 2026 | 75.5% | 22 |
| 5 Sep 2026 | 76.0% | 22 |
| 4 Sep 2026 | 75.6% | 22 |
| 3 Sep 2026 | 75.4% | 22 |
| 2 Sep 2026 | 75.0% | 22 |
| 1 Sep 2026 | 74.9% | 22 |
| 31 Aug 2026 | 74.8% | 22 |