California Route 91 American Flag painting part 1

I can't find this anywhere on the internet. It's probably the largest thing not to be on the internet.

On California Route 91 west of Riverside there is a huge painting of an American flag and the words 1776-1976 200 Years of Freedom. When it was done it must have been a large undertaking. I've driven by it many times and often thought it needed a fresh coat of paint. I'm amazed I can't find it because it's one of the busiest freeways in California and tens of thousands of cars drive by it every day.

I hope to find out more about this in the near future. If I were a TV reporter in California I'd do one of those stories where they wander around asking people on the street about it on camera and getting lots of "I don't know" and "Never really thought about it." At some point I'd also go to a city or county building looking for answers.