Allegheny Reservoir, PA

As of 2026-10-13, Allegheny Reservoir sits at 1321.40 ft, which is high for this time of year. That is 6.13 ft below full pool of 1327.53 ft. Over the past 30 days the level has fallen 6.32 ft.

The most recent reading at Allegheny Reservoir is 1321.40 ft (2026-10-13), sourced from the U.S. Army Corps of Engineers. Readings on this page refresh automatically as the agency publishes new data.

The highest level for Allegheny Reservoir in our records is 1340.52 ft on 2024-04-16. The lowest is 1296.41 ft on 2025-10-30. Our record covers about 12 years of readings.

Compared with every October in our records, the current level is higher than 83% of them, which we classify as high for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.

Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Allegheny Reservoir has fallen 6.32 ft over the past 30 days. For the operational reason on any given week, check the U.S. Army Corps of Engineers directly.

Allegheny Reservoir is +18.75 ft compared with this date last year (1321.40 ft today). The full-history chart above covers 12 years, with a record high of 1340.52 ft and a record low of 1296.41 ft.