Located in Oconto, Wisconsin, Reservoir (also known as Mccaslin Brook) is a gravity dam completed in 1877 with a primary purpose of recreation. With a height of 15 feet and a storage capacity of 3500 acre-feet, this reservoir offers a surface area of 618 acres for water enthusiasts to enjoy various activities. The dam has a controlled spillway with a width of 11 feet and a maximum discharge of 275 cubic feet per second, making it an important water resource for the region.

Managed by the local government, Reservoir is regulated by the Wisconsin Department of Natural Resources (WIDNR) and undergoes regular inspections to ensure its structural integrity. Despite being classified as a high hazard potential structure, the dam is currently in a satisfactory condition, with the last assessment conducted in August 2019. With a very high risk assessment rating of 1, it is crucial for stakeholders and climate enthusiasts to monitor and implement appropriate risk management measures to safeguard this vital water resource for future generations.

The surrounding area offers a picturesque setting for outdoor recreation, attracting visitors to engage in activities such as boating, fishing, and hiking. The reservoir's proximity to the Detroit District makes it a popular destination for water and climate enthusiasts seeking to explore the natural beauty of Wisconsin. As climate change continues to impact water resources globally, Reservoir serves as a reminder of the importance of sustainable water management practices to preserve and protect our environment for years to come.