Briggsville, also known as Lake Mason, is a gravity dam located in Marquette, Wisconsin, with a primary purpose of recreation. Completed in 1850, this dam stands at 14 feet tall and spans 250 feet in length, with a storage capacity of 850 acre-feet and a surface area of 856 acres. It is situated on the South Branch Neenah Creek and is regulated by the Wisconsin Department of Natural Resources, with permitting, inspection, and enforcement responsibilities falling under state jurisdiction.

The dam at Briggsville poses a high hazard potential, with a very high risk assessment rating of 1. Despite this, the condition assessment as of June 2019 was deemed satisfactory. The dam has undergone modifications in 1965 and 1993, with the last inspection conducted in May 2019. In the event of an emergency, it is crucial to have an effective Emergency Action Plan (EAP) in place, although details on its preparation and revision are not specified in the available data.

For water resource and climate enthusiasts, Briggsville offers a fascinating insight into the infrastructure that supports recreational activities while also highlighting the importance of proper maintenance and risk management for dams. Its location in a picturesque setting along the South Branch Neenah Creek adds to its allure, making it a valuable resource for both local residents and visitors to enjoy.