Tamarack Lake B (Pa-461b) in Crawford, Pennsylvania, is a state-regulated earth dam constructed in 1962 for flood risk reduction along the Mud Run river. With a dam height of 21 feet and a length of 425 feet, the reservoir has a maximum storage capacity of 8,150 acre-feet and a normal storage capacity of 3,850 acre-feet, covering a surface area of 556 acres. The dam serves multiple purposes, including flood risk reduction and recreation, making it a valuable resource for both environmental protection and public enjoyment.

Despite its high hazard potential, Tamarack Lake B is currently assessed to be in fair condition, with the last inspection conducted in September 2020. The dam is under the jurisdiction of the Pennsylvania Department of Environmental Protection and undergoes regular state permitting, inspection, and enforcement to ensure its safety and functionality. With its strategic location in East Fairfield Township and its critical role in flood control, Tamarack Lake B stands as a testament to sustainable water resource management in Pennsylvania, providing a vital link between water conservation, recreation, and disaster prevention in the region.

Water resource and climate enthusiasts can appreciate Tamarack Lake B as a prime example of effective dam infrastructure designed to balance flood protection with recreational opportunities. The reservoir's history of modifications and ongoing maintenance demonstrate a commitment to ensuring public safety and environmental stewardship in the face of changing climate patterns. As a state-regulated facility with a significant impact on the local ecosystem and community, Tamarack Lake B serves as a model for sustainable water management practices that prioritize both human needs and natural resource conservation.