The Lincoln Memorial Pool Mystery: 4 Theories on the Green Water

A major renovation of the Lincoln Memorial Reflecting Pool was meant to give it a sleek new look resembling the American flag. However, instead of a vibrant blue water, the pool has turned an uninviting green.

Images from the past few days show algae spreading rapidly across the surface, leading many to wonder if the changes made to the pool have created an environment that's perfect for algae growth.

The renovation, ordered by former US President Donald Trump, involved resurfacing the pool with a dark blue coating. However, this upgrade came at a cost of over $14 million, far exceeding the initial estimate of $1.5 to $2 million.

The 2,000-foot-long reflecting pool, situated between the Lincoln Memorial and the Washington Monument, has been a defining feature of Washington, D.C. since 1923. Despite numerous renovations, it has struggled with algae blooms, particularly during the summer months.

So, what's causing the green hue of the pool? We take a closer look at four theories:

1. Residual algae: With supply lines closed for eight weeks during construction, the water had time to become stagnant, allowing algae to grow and spread.

2. Darker coating absorbing heat: The new dark blue coating may be absorbing more sunlight and heat than the previous surface, raising water temperatures and creating ideal conditions for algae growth.

3. Favorable weather: Warm temperatures, strong sunlight, and calm conditions can all contribute to a perfect storm for algae growth in shallow, slow-moving bodies of water.

4. Infrastructure challenges: Issues with water circulation or aging pipe systems could be creating stagnant conditions, making it easier for algae to grow and thrive.

No evidence suggests any foul play, with officials dismissing claims of deliberate sabotage.

While the current pool conditions are not ideal, this episode offers an opportunity to reflect (pun intended) on the importance of preserving our nation's history and historical landmarks.