Name: Grand Lake St Marys water-level time series
Creator: Lakebrief

Question 1

What is the current water level at Grand Lake St Marys?

Accepted Answer

Grand Lake St Marys's current water level is shown at the top of this page, sourced from USGS gauge 403204084342601 and updated continuously. The 7-day trend, full-pool comparison, and a multi-year history chart are all on this page.

Question 2

What is the full pool elevation for Grand Lake St Marys?

Accepted Answer

Grand Lake St Marys has a full pool elevation of 872 ft (NGVD29). Surface area at full pool is 13,500 acres.

Question 3

How is Grand Lake St Marys's water level measured?

Accepted Answer

Water-surface elevation for Grand Lake St Marys is measured by USGS gauge 403204084342601. Lakebrief polls the upstream feed continuously and renders the latest reading, recent trend, and multi-year context.

Question 4

What is the historical low water level for Grand Lake St Marys?

Accepted Answer

The lowest recorded modern elevation for Grand Lake St Marys is approximately 869.1 ft. The low-water advisory threshold for the dashboard is 870 ft.

Grand Lake St Marys water level