Giant silo protects road workers on Ala Moana Boulevard

Drivers may have seen a giant silo in the middle of Ala Moana Boulevard.

According to the Department of Transportation, the cylinder in front of Ward Warehouses is called a batch filter. It lays down a layer of grout that creates a barrier to protect workers from underground water.

“It has to go down deeper than usual. It goes down about 15 feet, so when you get down that far, you get underneath the water table,” DOT Spokesperson Caroline Sluyter said.

Workers are putting in conduits and underground cables as part of the Ala Moana Beautification Project.

The DOT says they expect to remove the silo by the end of the year.

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