John Martin Reservoir Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
John Martin Reservoir water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has John Martin Reservoir been doing?
Across the available 30-day series, John Martin Reservoir is rising overall. The measured range runs from 3,800.9 ft to 3,805.55 ft, with a net change of +4.32 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 | 3805.43 ft | 3805.50 ft | 3805.55 ft |
| Oct 6 | 3805.24 ft | 3805.35 ft | 3805.43 ft |
| Oct 5 | 3804.92 ft | 3805.10 ft | 3805.24 ft |
| Oct 4 | 3804.12 ft | 3804.57 ft | 3804.91 ft |
| Oct 3 | 3802.98 ft | 3803.58 ft | 3804.11 ft |
| Oct 2 | 3801.63 ft | 3802.26 ft | 3802.97 ft |
| Oct 1 | 3801.06 ft | 3801.38 ft | 3801.62 ft |
| Sep 30 | 3801.01 ft | 3801.05 ft | 3801.13 ft |
| Sep 29 | 3801.14 ft | 3801.25 ft | 3801.37 ft |
| Sep 28 | 3801.32 ft | 3801.39 ft | 3801.42 ft |
| Sep 27 | 3801.38 ft | 3801.40 ft | 3801.41 ft |
| Sep 26 | 3801.28 ft | 3801.34 ft | 3801.39 ft |
| Sep 25 | 3801.25 ft | 3801.30 ft | 3801.32 ft |
| Sep 24 | 3801.13 ft | 3801.24 ft | 3801.33 ft |
| Sep 23 | 3801.06 ft | 3801.10 ft | 3801.14 ft |
| Sep 22 | 3801.05 ft | 3801.07 ft | 3801.09 ft |
| Sep 21 | 3800.90 ft | 3801.02 ft | 3801.18 ft |
| Sep 20 | 3800.91 ft | 3800.96 ft | 3800.99 ft |
| Sep 19 | 3800.94 ft | 3800.97 ft | 3800.99 ft |
| Sep 18 | 3800.91 ft | 3800.97 ft | 3801.01 ft |
| Sep 17 | 3800.92 ft | 3801.01 ft | 3801.07 ft |
| Sep 16 | 3801.03 ft | 3801.09 ft | 3801.14 ft |
| Sep 15 | 3801.14 ft | 3801.19 ft | 3801.23 ft |
| Sep 14 | 3801.22 ft | 3801.26 ft | 3801.29 ft |
| Sep 13 | 3801.26 ft | 3801.29 ft | 3801.31 ft |
| Sep 12 | 3801.22 ft | 3801.28 ft | 3801.33 ft |
| Sep 11 | 3801.14 ft | 3801.17 ft | 3801.22 ft |
| Sep 10 | 3801.13 ft | 3801.17 ft | 3801.22 ft |
| Sep 9 | 3801.16 ft | 3801.18 ft | 3801.21 ft |
| Sep 8 | 3801.17 ft | 3801.20 ft | 3801.24 ft |
John Martin Reservoir level-history FAQ
How has John Martin Reservoir water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is +4.32 ft and the overall direction is rising.
What was the highest John Martin Reservoir level in the last 30 days?
The highest reading in the available 30-day series is 3,805.55 ft.
What was the lowest John Martin Reservoir level in the last 30 days?
The lowest reading in the available 30-day series is 3,800.9 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.