An Otter Tail Company

Langdon Wind Energy Center photos

Tower foundations

Click on any photo to see an enlargement

Click to see an enlargement A backhoe prepares an area 60 x 60 feet and 8 feet deep for a tower foundation.
Click to see an enlargement Fibers indicate the depth to visually aid the workers in getting the foundations level.
Click to see an enlargement Workers spread wet concrete as it's poured for a floor under a wind tower foundation.
Click to see an enlargement They are creating a temporary level surface to work on under the wind tower foundation.
Click to see an enlargement Workers use a power screed on the wet concrete.
Click to see an enlargement Each tower foundationbase has 25 tons of rebar in it to reinforce the concrete tower base.
Click to see an enlargement 277 yards (about 28 cement trucks) of concrete is then poured into each of the tower base frameworks.
A completed tower base.
This tower base is ready to have the bottom section of a tower attached to it. It contains 120 bolts, each of which are 8 feet long and 1.25 inches in diameter.