Reservoir · Mississippi · United States · USACE CWMS
John Rankin Lock and Dam
103.9% full
Capacity
30.71 hm³
Volume stored
32 hm³
Coordinates
34.363°N, 88.408°W
Last updated
2026-09-15
Current fill
103.9%vs 7 days ago
Stale7-day trend
StaleDrought context
Drought Monitor at this site · 20 October 2026
D2severe drought
The ground at John Rankin 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. Mississippi 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: 2026-09-15.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 34.363°N, 88.408°W · Open in Google Maps
About John Rankin Lock and Dam
As of September 15, 2026, John Rankin Lock and Dam is filled to 103.9% of its total capacity, holding 31.91 hm³ of water out of a maximum 30.71 hm³. The reading is past the freshness window, so it is shown as stale.
The 7-day change is not shown, because the latest reading is past the freshness window.
Across the readings we hold for John Rankin Lock and Dam — 55 data points between October 29, 2021 and September 15, 2026 — the level has ranged from a low of 101.0% (December 7, 2021) to a high of 104.4% (September 13, 2026).
It is operated by USACE primarily for multiple purposes. It is at 34.363°N, 88.408°W.
Key facts
- Current fill level
- 103.9% of total capacity
- Water stored
- 31.91 hm³
- Total capacity
- 30.71 hm³
- 7-day change
- Stale
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 34.363°N, 88.408°W
- Last updated
- September 15, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 15 Sep 2026 | 103.9% | 31.91 |
| 14 Sep 2026 | 104.0% | 31.93 |
| 13 Sep 2026 | 104.4% | 32.05 |
| 20 Dec 2021 | 103.0% | 31.62 |
| 19 Dec 2021 | 103.1% | 31.67 |
| 18 Dec 2021 | 102.9% | 31.59 |
| 17 Dec 2021 | 102.6% | 31.52 |
| 16 Dec 2021 | 103.2% | 31.69 |
| 14 Dec 2021 | 101.5% | 31.16 |
| 13 Dec 2021 | 102.1% | 31.35 |
| 12 Dec 2021 | 103.1% | 31.67 |
| 11 Dec 2021 | 102.1% | 31.35 |