Marsh Creek Reservoir (Pa-437) in Chester, Pennsylvania is a state-owned water resource managed by the Pennsylvania Department of Environmental Protection. Built in 1973 by AandE-Gannett Fleming, this Earth-type dam serves multiple purposes including flood risk reduction, recreation, and water supply. With a height of 90 feet and a storage capacity of 24,000 acre-feet, the reservoir covers 535 acres and has a drainage area of 20 square miles.

Located in Upper Uwchlan Township, Marsh Creek Reservoir is a popular recreational spot offering activities such as fishing, boating, and hiking. The dam's hazard potential is rated as high, but its condition assessment is marked as fair. Regular inspections are conducted to ensure the safety and functionality of the structure, with the last inspection taking place in July 2020. The reservoir plays a crucial role in water management and conservation efforts in the region, providing both recreational opportunities and essential water supply for the community.

Managed by state regulators and meeting all necessary permitting and inspection requirements, Marsh Creek Reservoir is a key asset in the water infrastructure of Pennsylvania. With its tranquil setting and diverse ecological benefits, the reservoir serves as a vital resource for residents and visitors alike. Climate enthusiasts and water resource advocates can appreciate the strategic design and management of this reservoir in balancing flood control, recreation, and water supply needs in the region.