Facts and Data


Lake Monroe Facts

  • Lake Monroe was designed and built by the U.S. Army Corps of Engineers (USACE) beginning in 1960 and became fully operational in February, 1966
  • The purpose of the lake is flood control, water supply, and low flow augmentation for downstream waters
  • Normal pool for the lake is 538’ above mean sea level (MSL)
  • At normal pool, the lake has an area of 10,750 acres and is the largest lake in Indiana.
  • The maximum depth of Lake Monroe is 54’ in the bed of Salt Creek near the dam. The average depth is 17’
  • The shoreline length of Lake Monroe is 103 miles at normal pool
  • Lake Monroe lies mostly in Monroe County (88%), with the remaining 12% in Brown  County
  • Lake Monroe serves as the sole source of drinking water for over 100,000 people, serving residents in Monroe and Brown Counties.
  • Lake Monroe attracts over a million visitors per year. Popular activities include sight-seeing, fishing, swimming, picnicking, boating, skiing, and birding
  • Lake Monroe is a wildlife resources to a variety of species including the federally endangered clubshell mussel and Indiana bat.

Fig. 1

Breakdown of Watershed Counties


Fig. 1. A breakdown of the major counties that lie in the Lake Monroe drainage basin, the largest portion being Brown County (56.1%).



portion of the watershed from the North Fork of Salt Creek


portion from the Middle and South Forks of Salt Creek


portion from Brummett's Creek and Stephen's Creek

A map showing private vs. public areas in the watershed.

A map showing private vs. public areas in the watershed.



More Data Soon!

FOLM is working diligently to update, analyze, and act on data. For more information about data collection or to request access to raw data, please contact us.

Name *