Blue Marsh Lake water level

What this level means

Station 01470870, Blue Marsh Lake near Bernville, PA, publishes the water surface elevation used here. The last value stored here, 290.39 ft, is from 2026-09-09. The top of the dam sits at 331.3 ft. Over the record shown on the level page the gauge has moved between 284.47 ft and 290.54 ft (low on 2025-11-07, high on 2026-09-03). The Corps of Engineers puts the top of the flood pool at 306.3 ft. The agency sets full pool at 284.3 ft. Beach width and ramp access both move with the pool, so the number above is worth a look first.

How this reading is taken

USGS gauge 01470870 measures the water surface and publishes the value continuously. This page stores the latest reading at build time and refreshes the record daily, so the figure above is a real measurement rather than a model or an estimate.

Full pool for Blue Marsh Lake is 284.3 ft, so the gap between the reading and that number is what the reservoir is missing.

Elevations are given in feet above the gauge datum used by the operating agency. Two lakes are only comparable with each other through how full they are, not through their raw elevation, because each dam sits at a different height.