Tempe Town Lake Pedestrian bridge (1855)

Tempe Town Lake Pedestrian bridge and dam. Underneath the bridge are the bladders that form the dam that creates the reservoir. Re Town Lake, see earlier picture and Wikipedia description: en.wikipedia.org/wiki/Tempe_Town_Lake

Updated 3/7/2015: It turns out the bladder dam had burst back in 2010 and they're building a new dam to the west:
www.azcentral.com/story/news/local/tempe/2014/12/02/tempe-plans-two-year-warranty-year-dam/19767515