Backhoe photos on Flickr

A few feet down, the backhoe hit limestone. They were barely able to scratch the surface of it with the backhoe. So we didn't get to bury the aerobic system as deep as originally intended, but it's buried enough.

COSI's "The Science of Big Machines 2012" by COSI Columbus

Scenes from COSI's "The Science of Big Machines 2012." Bulldozers, dump trucks, and backhoes converged in downtown Columbus from June 9 through June 17, 2012. COSI's "The Science of Big Machines 2012" was created and made possible by the Ohio Contractors Association and the Ohio Operating Engineers Apprenticeship & Training Local 18 and was presented by Bob Evans.

COSI is Columbus, Ohio's dynamic hands-on Center of Science and Industry. For more information, please visit www.cosi.org.

Backhoe_1757 by George Post

Playing with the hoe by Lisa Richards

Jared's Tractor IV by dailyinvention

This has been an integral part of the house's construction.

Working by Megan Savela

Backhoe (39C) by Preservation Resource Center of New Orleans

Backhoe artistry by Pat Kight

Backhoe 9316 by John Linahan

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Backhoe 4 by Judy Baxter

View as a slideshow: flickr.com/photos/judybaxter/sets/72157594205077773/

Backhoe, 2009 by zantimisfit

This is the huge machine that was in my yard, digging up and then putting everything right in my driveway.

Cat backhoes by TheMichiganMan111

DSCN2404 by alnbbates

Claw [bw] by nezua

Jamie admiring a backhoe by John Chew

Two years old and still fascinated by construction equipment.

Ready to Pull by Gary Daniel

Backhoe waits for the signal to begin removing 42-inch thick blocks from the southeastern face of the Idaho State Capitol. Crews here are preparing to open up the new southeastern pathway entrance to the building’s Garden Level.

Allie does a little gardening by jjbuga