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PennsylvaniaReservoir, 586 acres, Armstrong County

Mahoning Creek Lake water level

Mahoning Creek Lake, Pennsylvania
Photo: Margaret Luzier, U.S. Army Corps of Engineers, Public domain

Current level

1,088.84ft NAVD88

Reading from Oct 26, 2026

Past 24 hours
-0.06ft
Past 7 days
-10.58ft
Past 30 days
-23.49ft
Trend
Falling

Mahoning Creek Lake was at 1,088.84 ft on October 26, falling 10.58 ft over the past week.

Last 30 days

109011001110Sep 25Oct 10Oct 25

Recent daily readings

Mahoning Creek Lake daily mean water level, newest first
DateLevel (ft NAVD88)Change
Oct 25, 20261,088.90-0.08
Oct 24, 20261,088.98-1.34
Oct 23, 20261,090.32-1.42
Oct 22, 20261,091.74-1.33
Oct 21, 20261,093.07-3.18
Oct 20, 20261,096.25-3.17
Oct 19, 20261,099.42-1.90
Oct 18, 20261,101.32-0.18
Oct 17, 20261,101.50-0.60
Oct 16, 20261,102.10-3.05
Oct 15, 20261,105.15-2.50
Oct 14, 20261,107.65-1.54
Oct 13, 20261,109.19+1.41
Oct 12, 20261,107.78+8.58

Reading these numbers

Readings are elevations in feet above the North American Vertical Datum of 1988 (NAVD88), the current national reference. Older dam documents often quote NGVD29 instead, which can differ by a few feet. See NGVD29 vs NAVD88.

On a reservoir, a few feet of drop changes the shoreline more than you would think. Low water exposes stumps, sandbars and old roadbeds that are normally well under the hull, and some ramps end before the water does.

High water brings its own problems: floating debris after storms, flooded docks and courtesy piers, and no-wake rules near flooded campgrounds. A quick look at the trend before you hitch up saves a wasted trip.

The gauge is listed by USGS as Mahoning Creek Reservoir at Mahoning Creek Dam, PA. Wind can pile water up at one end of a big lake for a few hours, so short spikes on a windy day are normal.

Mahoning Creek Lake water level questions

What is the water level at Mahoning Creek Lake today?

Mahoning Creek Lake was at 1,088.84 ft on October 26, falling 10.58 ft over the past week.

Is Mahoning Creek Lake rising or falling?

Over the last seven days the level has fallen (-10.58 ft), and it is -23.49 ft compared with 30 days ago.

Where does the Mahoning Creek Lake water level data come from?

From the U.S. Geological Survey, gauge 03035500 (Mahoning Creek Reservoir at Mahoning Creek Dam, PA). USGS publishes provisional readings every 15 to 60 minutes; they can be revised later after quality checks.

How often is this page updated?

The page itself is rebuilt every day with the latest daily values, and the current reading refreshes straight from the USGS each time you open it.

Nearby lakes

If Mahoning Creek is blown out, these are the closest alternatives. Tap through for their water levels.