Reservoir · Tennessee · United States · USACE CWMS
J Percy Priest Dam
78.6% full
Capacity
581.92 hm³
Volume stored
457 hm³
Coordinates
36.149°N, 86.619°W
Last updated
2026-06-12
Current fill
78.6%vs 7 days ago
+0.4%gaining
vs 1 year ago
+8.1%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: 2026-06-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 36.149, -86.619 · Open in Google Maps
About J Percy Priest Dam
As of June 12, 2026, J Percy Priest Dam is filled to 78.6% of its total capacity, holding roughly 457 hm³ of water out of a maximum 582 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), and it is 8.1 points above its level on the same date a year earlier.
Across the readings we hold for J Percy Priest Dam — 330 data points between June 13, 2021 and June 12, 2026 — the level has ranged from a low of 64.5% (December 29, 2021) to a high of 100.0% (September 22, 2021). On average the reservoir is fullest around September and at its lowest around February.
It is operated by USACE primarily for multiple purposes. It lies within the Tennessee basin at 36.149°N, 86.619°W.
Key facts
- Current fill level
- 78.6%
- Water stored
- 457 hm³
- Total capacity
- 582 hm³
- 7-day change
- ▲ 0.4 pts
- Year-on-year
- ▲ 8.1 pts
- Primary use
- Multipurpose
- River basin
- Tennessee
- Operator
- USACE
- Coordinates
- 36.149°N, 86.619°W
- Last updated
- June 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Jun 2026 | 78.6% | 457 |
| 11 Jun 2026 | 78.2% | 455 |
| 10 Jun 2026 | 78.2% | 455 |
| 9 Jun 2026 | 77.5% | 451 |
| 8 Jun 2026 | 77.1% | 449 |
| 7 Jun 2026 | 76.9% | 448 |
| 6 Jun 2026 | 76.8% | 447 |
| 5 Jun 2026 | 76.8% | 447 |
| 4 Jun 2026 | 76.7% | 446 |
| 3 Jun 2026 | 76.6% | 445 |
| 2 Jun 2026 | 76.4% | 445 |
| 1 Jun 2026 | 76.1% | 443 |
Frequently asked questions
What is the current water level of J Percy Priest Dam?
As of June 12, 2026, J Percy Priest Dam is at 78.6% of its capacity, holding approximately 457 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is J Percy Priest Dam reservoir full?
No. As of June 12, 2026, J Percy Priest Dam is within its normal operating range at 78.6% of its capacity, so it is not full.
Is the water level at J Percy Priest Dam rising or falling?
The level at J Percy Priest Dam has been broadly stable over the latest week on record (+0.4 points).
How much water can J Percy Priest Dam hold?
J Percy Priest Dam has a total capacity of 582 hm³.
Where is J Percy Priest Dam reservoir located?
J Percy Priest Dam is located in Tennessee, United States, within the Tennessee basin (coordinates 36.149°N, 86.619°W).
What is J Percy Priest Dam used for?
J Percy Priest Dam is used primarily for multiple purposes, and is managed by USACE.