The final two sculptures, on the viaduct at I-25, don't carry on this march-of-time theme, instead looking to time itself as the subject. "Clockworks" and "Sundial" convey the mechanistic and naturalistic approaches to the passage of time. These last two were late additions to the original commission and are perhaps the finest of the three pairs, though they do look kind of lonely out there.
Griggs's viaduct project is a rare local example of a public-art commission gone right. It's the kind of success worth showing to those distinguished visitors from around the world. Fortunately, you don't need to be a foreign dignitary to take a look.
"Platte Valley Time Vanes," six related sculptures by David Griggs, on permanent display on the 23rd Street viaduct.