When ocean erosion closed in on Cape Hatteras Lighthouse in North Carolina, engineers and the National Park Service picked relocation over shoreline hardening. The 198-foot brick tower once sat 1,500 feet from the surf, but storms and shifting sand cut that buffer to 120 feet, making a move the only workable path to keep the lighthouse standing and operational.
The challenge with a masonry tower is simple, it does not flex. In 1999, crews cut the lighthouse free from its foundation, built a grid of steel shoring beams under it, and used roughly 100 hydraulic jacks working in sync. Sensors tracked tilt and movement while push jacks drove the tower forward on a steel track, about five feet per cycle. Rollers carried the load, and workers coated the rails with ordinary bar soap to reduce friction.
The move started June 17, 1999, and ended July 9, 23 days later. The tower traveled 2,900 feet inland at an average of 125 feet a day. The project cost $11.8 million, set the lighthouse 1,500 feet back from the shoreline, and the beacon was relit that November. The relocation later won the American Society of Civil Engineers’ Outstanding Civil Engineering Achievement Award.
Restoration work that began in late 2023 brought full-height scaffolding and a closer look at the gallery deck support system near the top. Crews expected 30 to 40 cracks in the cast-iron brackets. Instead, they found 116 measurable cracks across 16 brackets, hidden behind about seven layers of brick. The Park Service also reported significant corrosion in the brackets and the tension ring that ties them together.
Engineers chose to dismantle the top of the lighthouse and install a concealed stainless steel support system with cantilevered arms embedded into the brickwork. The top 47 feet, including the lantern room and watch level, came off during 2026. The expanded scope raised the project cost from $19.2 million to about $30 million, with completion pushed to next summer.
For mason contractors, the story is a clear reminder that brickwork performance and hidden metal performance are different scopes. When embedded iron or steel sits behind multiple wythes, inspection access, corrosion repair, and replacement details drive cost and schedule. On heavy restoration jobs, temporary works, synchronized lifting, and movement monitoring protect mortar joints while crews address what the masonry has covered for decades.
Read the full, original article from EcoPortal.net here.