Halfway Point in Storage Tunnel Project Part of (NEORSD) Project Clean Lake with a large 20.75-ft. Herrenknecht TBM and an 1970s 12-ft. robbins TBM
https://www.constructionequipmentguide.com/crews-near-halfway-point-in-storage-tunnel-project/45357
cover tunnel photo by: Matt Brown from London, England / CC BY
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