Lincoln Memorial Reflecting Pool faces issues with algae and peeling coating
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National Park Service crews are working to clear a large bloom of green algae from the Lincoln Memorial Reflecting Pool. The effort is complicated by a failing "American flag blue" surface coating that is reportedly peeling off during the maintenance process.
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National Park Service workers are currently treating a significant growth of green algae at the Lincoln Memorial Reflecting Pool in Washington, D.C. The maintenance operation has encountered complications regarding the pool's surface treatment, which was applied to give the water an "American flag blue" appearance during the Trump administration.
Coating deterioration and maintenance
The New York Times reports that the "American flag blue" coating is peeling off as crews attempt to clear the algae. This development has created a dual challenge for park officials: managing the biological growth while simultaneously addressing the physical degradation of the surface layer. The report notes that the coating's failure occurred during the active cleanup and treatment of the water.
Technical challenges with water quality
Scientific American reports on the technical reasons why the algae remains despite the application of the blue tint. A water treatment expert explained that while the "American flag blue" was intended to provide a specific aesthetic for the pool, it did not address the underlying biological factors that cause algal blooms. The expert noted that because the coating is a surface-level measure rather than a systemic treatment, the bloom may continue to reappear unless the root causes of the growth are addressed independently of the water's color.