Here's a picture of the Tilted Arc in Foley Plaza.
(I was wrong, it's 120 feet long, not 160) from
www.arts.arizona.edu website.
http://www.arts.arizona.edu/are476/files/tilted_arc-ph.htm
I looked up Tilted Arc in google and found a lot of writing about it, very interesting to me. I have to get going to work, will read them later on.
If you're interested, look
Tilted Arc Foley Plaza Richard Serra
up on google, and check the link a few links down the page, from the arts.arizona.edu site. That piece discusses the three parties involved in such a situation, the artist, the government funder, and the public.