Deteriorating Lighthouse At Cape Cod National Seashore Set For Extended Closure

September 11, 2018

Highland Light will remain open for tours through October 21/NPS

One of the most iconic historic structures at Cape Cod National Seashore, Highland Light in Truro, Massachusetts, will undergo extensive rehabilitation beginning in October and remain closed through 2019.

After the lighthouse closes for the season on October 21, a $1.2 million project will address needed structural and safety repairs. This will be the first major rehabilitation of the lighthouse since the U.S. Coast Guard conveyed it to the National Park Service in 1998.

Although the lighthouse will be closed, the exhibit area and the Keeper’s Shop operated by Eastern National will remain open. The last day to climb Highland Light before the extended closure is October 21. Visit www.highlandlighthouse.org for tour hours, fees, and minimum height requirement.

The rehabilitation follows several years of analysis by preservation specialists and engineers who determined that accelerated deterioration of the lighthouse — evidenced by exterior cracks, spalling bricks, and corrosion — is due to excessive moisture caused by changes to the tower’s ventilation system. Ventilation was a critical design element of the 1857 lighthouse. Three rings of masonry walls and air space in the lower tower area facilitated air being drawn up toward the vent at the top of the lighthouse.

When the lighthouse was relocated back from the eroding cliff in 1996, these air spaces were filled with a cement-like material to provide stability during the move. This action, combined with layers of non-breathable coatings applied to the exterior, significantly reduced venting, promoting excessive moisture and causing deterioration to the masonry tower and corrosion to its metal components.

During the rehabilitation project, venting will be reestablished; masonry will be repaired; exterior coatings will be removed and a new breathable coating applied; windows will be replaced; corroded elements will be repaired or replaced; and safety improvements will be made.

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