The Hoover Dam was adorned by a massive football field-sized American flag over Memorial Day weekend ahead of the United States’ 250th anniversary celebration.

Nevada and Arizona leaders came together to adorn the iconic landmark with a 300-foot-tall, 150-foot-wide flag during the road to America250 ceremony, making it one of the most ambitious patriotic displays ever attempted. The dam was also lit up with red, white, and blue lights at night as part of the dramatic installation. (RELATED: Rededicate 250 Puts Christian Revival On Full Display, And Gen Z Came Out In Droves)

“As we approach America’s 250th anniversary, Nevada is proud to help tell the story of innovation, exploration, and progress that shapes our nation, from Hoover Dam to our growing technology and infrastructure sectors to the world-class tourism industry,” Republican Nevada Gov. Joe Lombardo said in a statement. “Nevada has always played an important role in American history.”

“For generations, Hoover Dam has stood as one of the greatest engineering achievements in American history. It represents determination, ingenuity, hard work, and the willingness of Americans to take on challenges that once seemed impossible.”

The installation will be in place through the 4th of July.

The flag itself was a huge undertaking, weighing roughly 2,000 pounds and over 500 pounds of sewing material added to reinforce the display. Hundreds of rings were welded onto the flag, requiring five days of preparatory sewing before installation.

The lighting installation alone utilized over 126,000 feet of wire and more than 550 automated LED lights, drawing roughly 2,250 amps entirely from the Hoover Dam’s hydroelectricity. A total of 30 lighting technicians and 185 elevator trips were required to transport and install the display.

“America’s promise has always been renewed by generations willing to make this country freer, safer, stronger, and more prosperous than they found it,” Democratic Arizona Gov. Katie Hobbs said in a statement. “That is the promise of America. And there is no greater testament to that spirit than Hoover Dam. Ninety years ago, in a time of hardship and uncertainty, Americans came together to build something the world had never seen. An iconic achievement of American infrastructure.”