South Englewood Flood Reduction Site B Update

Over February, the contractor and construction crew made progress on the new stormwater ponds off Navajo Street and the second tunnel run along Stanford Drive.

The pond features include stormwater elements such as trickle channels in both ponds, a concrete base at Pond A, and a concrete baffle wall at Pond B. The baffle wall was a significant effort to construct due to its large amount of rebar, which had to be cut, formed, and installed by hand. Non-stormwater features, including gabion baskets and light poles, have also begun to be installed at the ponds.

At the tunnel, the crew successfully launched the Tunnel Boring Machine (TBM) for Run 2 along Stanford Drive this month and has begun tunneling toward Stanford Avenue, where it will connect with Run 1. Both runs are being constructed using the two-pass method, meaning a temporary tunnel is built behind the TBM, and once the entire run is complete, the permanent pipe is slid and grouted into place. Crews are currently sliding the pipe into place for Run 1 and are more than halfway through this process.