Reservoir · Oklahoma · United States · USACE CWMS
Birch Lake
95.5% full
Capacity
23.71 hm³
Volume stored
23 hm³
Coordinates
36.535°N, 96.162°W
Last updated
2026-06-11
Current fill
95.5%vs 7 days ago
-0.1%losing
vs 1 year ago
-1.0%year-over-year
7-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: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 36.535, -96.162 · Open in Google Maps
About Birch Lake
As of June 11, 2026, Birch Lake is filled to 95.5% of its total capacity, holding roughly 23 hm³ of water out of a maximum 24 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts), and it is 1.0 points below its level on the same date a year earlier.
Across the readings we hold for Birch Lake — 329 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 75.4% (January 7, 2022) to a high of 105.0% (June 28, 2021). On average the reservoir is fullest around May and at its lowest around January.
It is operated by USACE primarily for multiple purposes. It lies within the Oklahoma basin at 36.535°N, 96.162°W.
Key facts
- Current fill level
- 95.5%
- Water stored
- 23 hm³
- Total capacity
- 24 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▼ 1.0 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 36.535°N, 96.162°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 95.5% | 23 |
| 10 Jun 2026 | 95.6% | 23 |
| 9 Jun 2026 | 96.4% | 23 |
| 8 Jun 2026 | 97.0% | 23 |
| 7 Jun 2026 | 97.5% | 23 |
| 6 Jun 2026 | 97.4% | 23 |
| 5 Jun 2026 | 96.9% | 23 |
| 4 Jun 2026 | 97.7% | 23 |
| 3 Jun 2026 | 98.4% | 23 |
| 2 Jun 2026 | 98.7% | 23 |
| 1 Jun 2026 | 97.3% | 23 |
| 31 May 2026 | 98.2% | 23 |
Frequently asked questions
What is the current water level of Birch Lake?
As of June 11, 2026, Birch Lake is at 95.5% of its capacity, holding approximately 23 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Birch Lake reservoir full?
Birch Lake is essentially full, sitting at 95.5% of capacity as of June 11, 2026.
Is the water level at Birch Lake rising or falling?
The level at Birch Lake has been broadly stable over the latest week on record (-0.1 points).
How much water can Birch Lake hold?
Birch Lake has a total capacity of 24 hm³.
Where is Birch Lake reservoir located?
Birch Lake is located in Oklahoma, United States, within the Oklahoma basin (coordinates 36.535°N, 96.162°W).
What is Birch Lake used for?
Birch Lake is used primarily for multiple purposes, and is managed by USACE.