President Trump aimed to enhance the Reflecting Pool at the Lincoln Memorial with a recent $14.2 million renovation. However, algal blooms quickly emerged after the project, altering the pool’s intended look.

The renovation involved applying dark blue waterproofing material to the concrete floor to improve its appearance and address leaks and algae issues. Initially, the pool was shiny and clear upon refilling. Yet, consecutive hot, humid days led to algae resurfacing, affecting its pristine appearance.

The Interior Department, responsible for the site, has yet to comment. Last week, spokeswoman Katie Martin indicated ongoing efforts to eliminate the algae, attributed to residual build-up in the inactive supply lines during construction. She assured that the algae would soon be gone.

President Trump described the pool as “filthy” prior to the renovation and expressed confidence in the improvements.

The renovation bypassed the usual bidding process, citing urgency due to the upcoming 250th national birthday celebration. Two no-bid contracts were awarded: one to Atlantic Industrial Coatings from Virginia for waterproofing and joint repairs, and the other to Ohio’s Greenwater Services for an upgraded purification system. While Atlantic Industrial Coatings completed its job on June 4, the status of the purification system installation remains unknown.

Workers from the National Park Service, alongside Pearl Purity Water Solutions personnel, have actively skimmed algae blooms from the pool. The algae did not bother all visitors. Bonnie Garvin, visiting from Monticello, Ga., remarked that the green water was not problematic as no swimming occurred. Conversely, Jessica Lea from Portland, Ore., expressed disappointment in the landmark’s appearance, noting the lack of reflection due to the algae.

Climate change reporter Maxine Joselow reported for The Times from Washington.