Lake Chelan annual operating range and lake level history
The summer of 2015 has been unusual for Lake Chelan. Lake levels were kept somewhat higher than in most years because of the low snowpack and limited runoff that occurred. As we move into the fall, the PUD expects to be at the Federal license minimum of 1,098.7’ by Sept. 7. This allows the PUD to be in a position to manage any rainfall that could occur later in the season. Click here for the Northwest River Forecast Center water supply forecast for Lake Chelan.
Graph lines can be turned "on" and "off" by clicking on the legend names above.
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Lake levels are expected to be within the forecasted operating range most of the time.
Actual lake levels may be higher or lower than the forecasted operating range.
Future Operation (updated Nov. 10):
The “Oct. 1 Forecasted Operating Range” in the graph above represents the annual forecasted operating range for the new water year (October 2015 – September 2016).
The “Current Forecasted Operating Range” in the graph above represents the most recent forecasted operating range between now and the end of the water year (Nov. 10, 2015 – Sept. 30, 2016). Both units at the Chelan Hydro project are expected to generate full time for the foreseeable future to reduce lake levels to prepare for the upcoming year’s runoff into the lake.
For Those on the Go
A direct link to current lake level readings is available using smart phones and tablets by scanning a QR (Quick Response) code. The code is available on posters at boat launches and marinas and rack cards distributed throughout the Chelan-Manson-Chelan Falls community.
Lake Level Management
Lake Chelan is the reservoir for the Lake Chelan Hydro Project. Managing the level of popular Lake Chelan requires balancing seven objectives in the operating license that together provide recreation, protect fish, reduce erosion and restore year-round flows to the Chelan River.
Managing the level of the lake is not an exact science. It involves a series of forecasts and calculations, with the added uncertainty of weather. However, updated tools and additional data will help us provide information that is more useful for residents and visitors.
Targeting a Range
Chelan PUD estimates that Lake Chelan can be operated within the above Current Operating Range most of the time, and meet the District’s seven license operating objectives and target elevations in most years.
We are committed to letting you know about any changes in expected lake levels as soon as we can so residents and visitors know what to expect. We welcome your comments or questions about Lake Chelan levels.
The District expects to maintain the lake level within a range of 1,084 to 1,100 feet above sea level during most years. In extremely wet years, the lake level could be lowered to 1,083 feet above sea level, or lower (the license minimum is 1,079 feet above sea level), as more room is needed to capture increased runoff. Factors that can affect lake level management include:
We are sensitive to the needs of the many users of Lake Chelan. Below are the elevations at the bottom of each concrete boat ramp. As lake levels fluctuate, boaters are asked to take these elevations into consideration before launching a boat.
|Elevation at |
End of Boat Ramp
|Chelan Riverwalk Park||Chelan PUD||Chelan||2 concrete ramps||1080.5 feet|
|Lake Chelan State Park||WA State Parks||Chelan||1 concrete ramp||1090.0 feet|
|City of Chelan||Chelan||2 concrete ramps||1090.0 feet|
|Manson Bay Park||Manson Parks||Manson||1 concrete ramp||1077.9 feet|
|Old Mill Park||Manson Parks||Manson||4 concrete ramps||1082.9 feet|
|25-Mile Creek State Park||WA State Parks||Chelan||2 concrete ramps||1093.0 feet|