Reservoir · Washington · United States · BOR RISE
Franklin D. Roosevelt Lake, Grand Coulee
Franklin D. Roosevelt Lake, Grand Coulee Dam, and Powerplant
53.5% full
Capacity
11,794.55 hm³
Volume stored
6307 hm³
Vs month average
103% of normal
Coordinates
47.957°N, 118.981°W
Last updated
2026-10-19
Current fill
53.5%vs 7 days ago
+1.5 ppgaining
vs 1 year ago
+0.9 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
103%of normal
53.5% full on 2026-10-19, against an average of 51.9% for October across 6 years of readings (+1.6 points).
Drought Monitor at this site · 20 October 2026
D1moderate drought
The ground at Franklin D. Roosevelt Lake, Grand Coulee's coordinates falls inside the D1 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Washington drought figures →
Data source: BOR RISE — US Bureau of Reclamation — 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: 2026-10-19.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 47.957°N, 118.981°W · Open in Google Maps
About Franklin D. Roosevelt Lake, Grand Coulee
As of October 19, 2026, Franklin D. Roosevelt Lake, Grand Coulee is filled to 53.5% of its total capacity, holding 6,307 hm³ of water out of a maximum 11,795 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has risen by 1.5 percentage points, and it sits close to where it was a year earlier.
Across the readings we hold for Franklin D. Roosevelt Lake, Grand Coulee — 1815 data points between October 28, 2021 and October 19, 2026 — the level has ranged from a low of 18.1% (April 10, 2023) to a high of 55.4% (July 9, 2022). On average the reservoir is fullest around July and at its lowest around April.
It is operated by BOR primarily for multiple purposes. It is at 47.957°N, 118.981°W.
Key facts
- Current fill level
- 53.5% of total capacity
- Water stored
- 6,307 hm³
- Total capacity
- 11,795 hm³
- 7-day change
- ▲ 1.5 pp
- Year-on-year
- ▲ 0.9 pp
- Primary use
- Multipurpose
- Operator
- BOR
- Coordinates
- 47.957°N, 118.981°W
- Last updated
- October 19, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 19 Oct 2026 | 53.5% | 6,307 |
| 18 Oct 2026 | 53.3% | 6,288 |
| 17 Oct 2026 | 53.3% | 6,288 |
| 16 Oct 2026 | 53.1% | 6,268 |
| 15 Oct 2026 | 52.7% | 6,218 |
| 14 Oct 2026 | 52.5% | 6,188 |
| 13 Oct 2026 | 52.0% | 6,139 |
| 12 Oct 2026 | 52.0% | 6,129 |
| 11 Oct 2026 | 52.0% | 6,129 |
| 10 Oct 2026 | 52.1% | 6,149 |
| 9 Oct 2026 | 52.2% | 6,159 |
| 8 Oct 2026 | 52.4% | 6,178 |