Horsethief Reservoir Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
Horsethief Reservoir water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has Horsethief Reservoir been doing?
Across the available 30-day series, Horsethief Reservoir is falling overall. The measured range runs from 2,419.94 ft to 2,420.21 ft, with a net change of -0.10 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 | 2420.10 ft | 2420.10 ft | 2420.11 ft |
| Oct 6 | 2420.11 ft | 2420.12 ft | 2420.13 ft |
| Oct 5 | 2420.12 ft | 2420.13 ft | 2420.14 ft |
| Oct 4 | 2420.13 ft | 2420.14 ft | 2420.14 ft |
| Oct 3 | 2420.13 ft | 2420.15 ft | 2420.15 ft |
| Oct 2 | 2420.14 ft | 2420.15 ft | 2420.16 ft |
| Oct 1 | 2420.14 ft | 2420.15 ft | 2420.17 ft |
| Sep 30 | 2420.03 ft | 2420.09 ft | 2420.15 ft |
| Sep 29 | 2420.00 ft | 2420.01 ft | 2420.03 ft |
| Sep 28 | 2420.00 ft | 2420.01 ft | 2420.02 ft |
| Sep 27 | 2420.01 ft | 2420.02 ft | 2420.03 ft |
| Sep 26 | 2420.03 ft | 2420.03 ft | 2420.05 ft |
| Sep 25 | 2420.02 ft | 2420.02 ft | 2420.04 ft |
| Sep 24 | 2420.01 ft | 2420.02 ft | 2420.03 ft |
| Sep 23 | 2419.94 ft | 2419.98 ft | 2420.03 ft |
| Sep 22 | 2419.95 ft | 2419.96 ft | 2419.97 ft |
| Sep 21 | 2419.96 ft | 2419.97 ft | 2419.98 ft |
| Sep 20 | 2419.96 ft | 2419.97 ft | 2419.99 ft |
| Sep 19 | 2419.95 ft | 2419.97 ft | 2419.99 ft |
| Sep 18 | 2419.98 ft | 2420.00 ft | 2420.03 ft |
| Sep 17 | 2420.01 ft | 2420.03 ft | 2420.05 ft |
| Sep 16 | 2420.02 ft | 2420.05 ft | 2420.06 ft |
| Sep 15 | 2420.03 ft | 2420.05 ft | 2420.08 ft |
| Sep 14 | 2420.06 ft | 2420.09 ft | 2420.11 ft |
| Sep 13 | 2420.10 ft | 2420.12 ft | 2420.13 ft |
| Sep 12 | 2420.13 ft | 2420.15 ft | 2420.17 ft |
| Sep 11 | 2420.16 ft | 2420.18 ft | 2420.19 ft |
| Sep 10 | 2420.11 ft | 2420.18 ft | 2420.21 ft |
| Sep 9 | 2420.11 ft | 2420.12 ft | 2420.14 ft |
| Sep 8 | 2420.12 ft | 2420.15 ft | 2420.17 ft |
Horsethief Reservoir level-history FAQ
How has Horsethief Reservoir water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is -0.10 ft and the overall direction is falling.
What was the highest Horsethief Reservoir level in the last 30 days?
The highest reading in the available 30-day series is 2,420.21 ft.
What was the lowest Horsethief Reservoir level in the last 30 days?
The lowest reading in the available 30-day series is 2,419.94 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.