Your choices this year are rich. Two workers with elbows outstretched seem to become part of the orange-rust-surfaced bolts and plates of a Manhattan tower frame. The concentric rings of a rebar cage encircle a worker on an Egyptian monorail project. A bending, torch-bearing worker throws fire on the end of a cable to replace the submarine power line at a Boston Harbor wastewater treatment plant. A tilt-up panel project turns into a tableau of light and color at a battery manufacturing plant in Georgia. And finally, undulating lines of rail, conduit, shadow and light converge on the crew of a tunnel extension in Washington State.

Your choices in the poll will determine the format as well as the image. Two covers are traditional magazine-size vertical images. The remaining three will become what’s known in magazine publishing as a gatefold—a fold-out format that reveals the entirety of the photo when the reader unfolds the cover. If one of those options is the winner, the cover will be delivered to readers folded and looking like a typical magazine cover, but it’s just the first half of the image that is visible. The image adds rich detail when the entire view is visible.

All the winning photos will appear in ENR’s print issue and, of course, on ENR.com, where they will be archived with previous years’ winners.

You can find the contestant photos and the poll at enr.com/photo-contest-poll. Be sure to vote by Dec. 21.