Lake Billy Chinook Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
Lake Billy Chinook water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has Lake Billy Chinook been doing?
Across the available 30-day series, Lake Billy Chinook is falling overall. The measured range runs from 1,942.33 ft to 1,945.05 ft, with a net change of -2.58 ft.
Lake levels can respond to rainfall, watershed inflow, dam and hydropower operations, seasonal target elevations, evaporation and downstream release requirements. This page reports what the matched sensor measured; it does not infer why an operator changed a reservoir.
Recent daily levels
| Date | Low | Average | High |
|---|---|---|---|
| Oct 7 | 1942.46 ft | 1942.46 ft | 1942.47 ft |
| Oct 6 | 1942.44 ft | 1942.46 ft | 1942.47 ft |
| Oct 5 | 1942.46 ft | 1942.46 ft | 1942.47 ft |
| Oct 4 | 1942.46 ft | 1942.47 ft | 1942.47 ft |
| Oct 3 | 1942.33 ft | 1942.39 ft | 1942.48 ft |
| Oct 2 | 1942.36 ft | 1942.39 ft | 1942.45 ft |
| Oct 1 | 1942.45 ft | 1942.49 ft | 1942.56 ft |
| Sep 30 | 1942.41 ft | 1942.54 ft | 1942.67 ft |
| Sep 29 | 1942.46 ft | 1942.61 ft | 1942.77 ft |
| Sep 28 | 1942.42 ft | 1942.54 ft | 1942.69 ft |
| Sep 27 | 1942.56 ft | 1942.68 ft | 1942.82 ft |
| Sep 26 | 1942.70 ft | 1942.86 ft | 1943.00 ft |
| Sep 25 | 1942.88 ft | 1943.12 ft | 1943.23 ft |
| Sep 24 | 1943.17 ft | 1943.28 ft | 1943.41 ft |
| Sep 23 | 1943.39 ft | 1943.50 ft | 1943.64 ft |
| Sep 22 | 1943.62 ft | 1943.70 ft | 1943.83 ft |
| Sep 21 | 1943.54 ft | 1943.68 ft | 1943.85 ft |
| Sep 20 | 1943.57 ft | 1943.70 ft | 1943.84 ft |
| Sep 19 | 1943.85 ft | 1943.93 ft | 1944.03 ft |
| Sep 18 | 1943.97 ft | 1944.05 ft | 1944.19 ft |
| Sep 17 | 1944.00 ft | 1944.13 ft | 1944.23 ft |
| Sep 16 | 1944.16 ft | 1944.29 ft | 1944.44 ft |
| Sep 15 | 1944.14 ft | 1944.30 ft | 1944.42 ft |
| Sep 14 | 1944.20 ft | 1944.37 ft | 1944.52 ft |
| Sep 13 | 1944.24 ft | 1944.36 ft | 1944.50 ft |
| Sep 12 | 1944.29 ft | 1944.42 ft | 1944.56 ft |
| Sep 11 | 1944.42 ft | 1944.55 ft | 1944.65 ft |
| Sep 10 | 1944.44 ft | 1944.61 ft | 1944.73 ft |
| Sep 9 | 1944.59 ft | 1944.74 ft | 1944.92 ft |
| Sep 8 | 1944.55 ft | 1944.71 ft | 1944.87 ft |
Lake Billy Chinook level-history FAQ
How has Lake Billy Chinook water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is -2.58 ft and the overall direction is falling.
What was the highest Lake Billy Chinook level in the last 30 days?
The highest reading in the available 30-day series is 1,945.05 ft.
What was the lowest Lake Billy Chinook level in the last 30 days?
The lowest reading in the available 30-day series is 1,942.33 ft.
Are historical USGS lake readings final?
Not always. Recent readings may be marked provisional and can be revised by the source agency after quality review.