Reservoir · Tennessee · United States · USACE CWMS
Old Hickory Lock and Dam
97.7% full
Capacity
518.06 hm³
Volume stored
506 hm³
Vs month average
100% of normal
Coordinates
36.294°N, 86.657°W
Last updated
2026-10-28
Current fill
97.7%vs 7 days ago
-0.3 pplosing
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
100%of normal
97.7% full on 2026-10-28, against an average of 98.0% for October across 2 years of readings (-0.3 points).
Drought Monitor at this site · 20 October 2026
D2severe drought
The ground at Old Hickory Lock and Dam's coordinates falls inside the D2 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Tennessee drought figures →
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: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 36.294°N, 86.657°W · Open in Google Maps
About Old Hickory Lock and Dam
As of October 28, 2026, Old Hickory Lock and Dam is filled to 97.7% of its total capacity, holding 505.92 hm³ of water out of a maximum 518.06 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.3 pp).
Across the readings we hold for Old Hickory Lock and Dam — 323 data points between October 29, 2021 and October 28, 2026 — the level has ranged from a low of 92.4% (March 4, 2022) to a high of 104.3% (February 26, 2022). On average the reservoir is fullest around June and at its lowest around March.
It is operated by USACE primarily for multiple purposes. It is at 36.294°N, 86.657°W.
Key facts
- Current fill level
- 97.7% of total capacity
- Water stored
- 505.92 hm³
- Total capacity
- 518.06 hm³
- 7-day change
- ▼ 0.3 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 36.294°N, 86.657°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 97.7% | 505.92 |
| 27 Oct 2026 | 96.4% | 499.17 |
| 26 Oct 2026 | 96.4% | 499.44 |
| 25 Oct 2026 | 96.8% | 501.58 |
| 24 Oct 2026 | 97.4% | 504.54 |
| 23 Oct 2026 | 97.4% | 504.82 |
| 22 Oct 2026 | 97.5% | 505.09 |
| 21 Oct 2026 | 98.0% | 507.84 |
| 20 Oct 2026 | 98.2% | 508.94 |
| 19 Oct 2026 | 98.2% | 508.94 |
| 18 Oct 2026 | 98.8% | 511.68 |
| 17 Oct 2026 | 98.1% | 508.11 |