WMATA E2C, E3B, and E4B Projects

WMATA E2C, E3B, and E4B Projects


Washington D.C.

The WMATA E2C, E3B, and E4B projects include twin 20 foot diameter subway tunnels in soft flowing ground.


Portal with drainage flows.

Deere & Ault Consultants, Inc. staff provided a pre-bid analysis of the tunnel alignments, and consulting services for one of the contracts. Our services included mapping the geologic conditions as they were encountered, and conducting a soil exploration and laboratory testing program ahead of the digger shield.

Deere & Ault’s staff also advised the contractor on dewatering methods, the effectiveness of chemical grouting, and geologic conditions that required special consideration.

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