Ninetynine Island Res Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
Ninetynine Island Res water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has Ninetynine Island Res been doing?
Across the available 30-day series, Ninetynine Island Res is rising overall. The measured range runs from 507.7 ft to 511.77 ft, with a net change of +1.23 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 | 509.68 ft | 509.78 ft | 509.86 ft |
| Oct 6 | 509.71 ft | 509.79 ft | 509.88 ft |
| Oct 5 | 509.11 ft | 510.04 ft | 510.75 ft |
| Oct 4 | 507.84 ft | 508.26 ft | 509.08 ft |
| Oct 3 | 507.73 ft | 507.93 ft | 508.10 ft |
| Oct 2 | 508.11 ft | 508.41 ft | 508.69 ft |
| Oct 1 | 508.69 ft | 508.90 ft | 509.11 ft |
| Sep 30 | 509.11 ft | 509.33 ft | 509.52 ft |
| Sep 29 | 509.52 ft | 509.66 ft | 509.76 ft |
| Sep 28 | 509.76 ft | 509.80 ft | 509.85 ft |
| Sep 27 | 509.70 ft | 509.81 ft | 509.86 ft |
| Sep 26 | 509.72 ft | 509.80 ft | 509.90 ft |
| Sep 25 | 509.72 ft | 510.39 ft | 511.01 ft |
| Sep 24 | 511.03 ft | 511.39 ft | 511.77 ft |
| Sep 23 | 509.84 ft | 510.23 ft | 511.00 ft |
| Sep 22 | 509.72 ft | 509.81 ft | 509.87 ft |
| Sep 21 | 509.65 ft | 509.98 ft | 510.37 ft |
| Sep 20 | 507.88 ft | 509.40 ft | 510.37 ft |
| Sep 19 | 507.71 ft | 507.87 ft | 508.05 ft |
| Sep 18 | 507.71 ft | 507.84 ft | 508.01 ft |
| Sep 17 | 507.70 ft | 507.85 ft | 508.00 ft |
| Sep 16 | 507.72 ft | 507.91 ft | 508.20 ft |
| Sep 15 | 508.21 ft | 508.59 ft | 508.87 ft |
| Sep 14 | 508.88 ft | 509.02 ft | 509.07 ft |
| Sep 13 | 509.06 ft | 509.27 ft | 509.54 ft |
| Sep 12 | 509.55 ft | 509.71 ft | 509.80 ft |
| Sep 11 | 509.74 ft | 509.81 ft | 509.84 ft |
| Sep 10 | 509.69 ft | 509.81 ft | 509.92 ft |
| Sep 9 | 509.66 ft | 509.78 ft | 509.92 ft |
| Sep 8 | 508.46 ft | 509.52 ft | 510.52 ft |
Ninetynine Island Res level-history FAQ
How has Ninetynine Island Res water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is +1.23 ft and the overall direction is rising.
What was the highest Ninetynine Island Res level in the last 30 days?
The highest reading in the available 30-day series is 511.77 ft.
What was the lowest Ninetynine Island Res level in the last 30 days?
The lowest reading in the available 30-day series is 507.7 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.