The sea wall surrounding the Tidal Basin has been sinking into the mud for years as water levels rise.
The agency is proposing a massive project to restore 6,800 feet of sea wall around the Tidal Basin and in West Potomac Park, and re-landscape the shoreline.The basin, which dates back more than a century, is a beloved focus of the National Cherry Blossom Festival, when it is crowded with people who gather to view and photograph the blooming cherry trees.The basin is also the site of the Martin Luther King Jr.
But parts of the sea wall have been sinking for years, and the structure and its walkway are often submerged by tidal inundations. In some places, the wall has settled as much as four feet since it was rebuilt in the 1930s and ’40s, the Park Service said. A decade ago, the agency spent more than $12 million to fix the sea wall in front of the Jefferson Memorial, where it was slipping away and sinking into the mud.
That section was believed to have failed because it was built on a foundation of wooden pilings that were not long enough to reach bedrock. The old foundation was replaced with concrete pilings and caissons resting on bedrock. A contract to design and execute the project will be awarded next year or in early 2024, the Park Service said.
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