Show us the necessary backbones of life - from support columns to transit systems to power relays.
You can also view the photos that didn't make the cut for this contest – the B-Sides.
Contest links on Fark.com: All Entries | Voting Results Click on any photo to view larger size.
Glen Canyon Dam at the mouth of Lake Powell
Spillway at Lake Spavinaw, source of Tulsa's municipal water supply
Drawbridge & sailboat in Tampa Bay
