Deep Foundations Institute DFI ® 326 Lafayette Avenue Hawthorne, NJ 07506 USA Phone: +1 (973) 423-4030 +1 (973) 423-4031 Fax: A grout curtain, drilled shafts and rock anchors are all part of Phase 3 of the $1.87 billion Soo Lock project between Lakes Superior and Huron.