Ref No: 93TJ1018
Date: October 18, 1993
Author: Thomas E. Jewett, Vice President Engineering
Subject: Tahoe Keys Resort Sheet pile bulkhead restoration.
Project Site: St. Moritz Isle, Tahoe Keys Resort (Lake Tahoe), California (U.S.A.)
Description of Problem: Homeowners of the exclusive St. Moritz Isle in the environmentally sensitive Tahoe Keys Resort were faced with an immediate concern: Over 100 homes and properties were being threatened by progressive structural failure of a sheet pile bulkhead that separated their residential properties from Lake Tahoe.
Site / Design Conditions: Several sections of the seawall bulkhead failed during the winter of 1993.
Ref No: 95TJ1011
Date: October 11, 1995
Author: Thomas E. Jewett, Vice President Engineering Services
Subject: Allan Block / MANTA RAY® Hybrid Retaining Wall
Project Site: 7670 Bush Lake Drive; Bloomington, Minnesota (U.S.A.). Residential retaining wall on "spec" home.
Description of Problem: Local site conditions preclude normal excavation for installation of geo grid for this type of wall.
Site / Design Conditions:
Wall #1 4.2' - 4.8' tall
Wall #2 6'4" above and 5' - 14' behind wall #1
Access only from driveway in front of walls.
Proposed Solution / Selected Solution: Where excavation is impossible or impractical, this type of wall could not be installed.