In the 1820s Joseph Brooks, a Welshman who had immigrated to Philadelphia, built a woolen mill of stone, 3½ stories high.
Supplies, operatives, and materials such as expensive raw wool, had to be brought in from Philadelphia, and the finished products shipped down to this city by wagons, a trip which took 10 days.
[5] After nearly 3 years of closure to the public, reopening in May 2013, the park had accessible trails and picnic sites that met Americans with Disabilities Act (ADA) standards.
[7] In October 2022 the NPS announced that a nearly $3 million contract had been awarded to Puyenpa services, LLC from Gaithersburg, MD 20877, a company experienced in trail construction and familiar with sensitive natural and cultural resources for a final phase of restoration and construction work.
[9] On May 30, 2023 the NPS announced the final stage of restoration was set to start with work to continue through the fall and into early winter.