Looking inside and outside of Tillotson’s elevator in Cavalier, N.D.


Story by Ronald Ahrens with photos by Scott Hansen

While looking at the specifications for Tillotson Construction Company’s concrete elevator built at Cavalier, N.D., in 1948, we gave a call to CHS, Inc. and reached Scott Hansen, who oversees operations at the 460,000-bushel facility there.

South view.

South view. Click on the image to enlarge it.

Hansen said the Tillotson elevator is mainly used for extra capacity during harvest. The operation mainly handles wheat, he said in a subsequent text message, “but also a lot of soybeans and corn.”

He offered to take some pictures, and we present them here, along with repeating the specs from our post of July 27.

This elevator was built according to the plan used for an elevator at Sheldon, Iowa, in 1941. It featured a center driveway and four tanks, each being 14.5 feet in diameter and rising 102 feet. Total capacity was 93,700 bushels.

The job required 1,027 tons of reinforced concrete and 55.13 tons of steel.

At 18 inches thick and covering 1,768 square feet, the main slab supported a gross weight as as high as 5,321 tons. Eight bins were overhead in the 12-by-17-foot driveway.

Crowning the main house was a cupola, or headhouse, of 15.5 x 32 x 22.5 feet, and the pulley center in this single-leg elevator was 127.0 feet above the floor.

North view.

North view. The blue conveyor fills the structure; the gray one on the ground empties it.

Boot and head pulleys were 60 x 14 inches, but the head pulley’s axle diameter of 3-7/16 inches was 1.25 inches greater than the boot’s.

The 14-inch, 6-ply Calumet belt had cups of 12 x 6-inches spaced 10 inches apart. A 20-hp Howell motor supplied the drive in the headhouse. Actual leg capacity was 4500 bushels per hour.

A 2-hp motor operated the man lift. (Lifts in some Tillotson elevators of this era were still hand-operated.)

Cavalier was a fully accessorized elevator, with a 10-bushel load-out scale, an 8-inch load-out spout of 10-gauge steel, and 14-gauge cupola spouting. There was a 7.5-hp truck lift and a dust collection system consisting of a fan, column, and bin.

In the space for remarks at the page’s bottom, we find written, “One end round on cupola.” Yet the photo shows both ends are rounded.


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