Reservoir · Georgia · United States · USACE CWMS
Allatoona Dam and Lake
93.9% full
Capacity
453.27 hm³
Volume stored
426 hm³
Coordinates
34.163°N, 84.728°W
Last updated
2026-09-14
Current fill
93.9%vs 7 days ago
-1.0%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: 2026-09-14.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 34.163, -84.728 · Open in Google Maps
About Allatoona Dam and Lake
As of September 14, 2026, Allatoona Dam and Lake is filled to 93.9% of its total capacity, holding roughly 426 hm³ of water out of a maximum 453 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-1.0 pts).
Across the readings we hold for Allatoona Dam and Lake — 329 data points between September 15, 2021 and September 14, 2026 — the level has ranged from a low of 57.0% (January 14, 2022) to a high of 105.0% (July 26, 2026). On average the reservoir is fullest around June and at its lowest around January.
It is operated by USACE primarily for multiple purposes. It lies within the Georgia basin at 34.163°N, 84.728°W.
Key facts
- Current fill level
- 93.9%
- Water stored
- 426 hm³
- Total capacity
- 453 hm³
- 7-day change
- ▼ 1.0 pts
- Primary use
- Multipurpose
- River basin
- Georgia
- Operator
- USACE
- Coordinates
- 34.163°N, 84.728°W
- Last updated
- September 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Sep 2026 | 93.9% | 426 |
| 13 Sep 2026 | 93.8% | 425 |
| 12 Sep 2026 | 93.6% | 424 |
| 11 Sep 2026 | 93.4% | 423 |
| 10 Sep 2026 | 93.8% | 425 |
| 9 Sep 2026 | 94.3% | 428 |
| 8 Sep 2026 | 94.6% | 429 |
| 7 Sep 2026 | 94.9% | 430 |
| 6 Sep 2026 | 95.0% | 431 |
| 5 Sep 2026 | 95.1% | 431 |
| 4 Sep 2026 | 95.4% | 433 |
| 3 Sep 2026 | 96.1% | 436 |