Peacock, also known as Fowler Lake, is a gravity dam located in Oconomowoc, Wisconsin, that serves primarily for recreational purposes. Completed in 1840, this historic dam stands at a height of 11 feet and has a storage capacity of 630 acre-feet. With a surface area of 78 acres and a drainage area of 88 acres, Peacock Dam plays a crucial role in managing water resources in the region.

Managed by the local government and regulated by the Wisconsin Department of Natural Resources, Peacock Dam has been deemed to have a significant hazard potential, although its condition is currently assessed as satisfactory. The dam has undergone modifications in 1938 and is subject to regular inspections to ensure its safety and structural integrity. Its controlled spillway, with a width of 90 feet, helps regulate the flow of the Oconomowoc River and prevent flooding in the surrounding area.

Despite its age, Peacock Dam continues to be a vital asset for water management and recreational activities in Waukesha County. Enthusiasts of water resources and climate will appreciate the historical significance and functional importance of this structure in sustaining the local ecosystem and providing opportunities for outdoor recreation.