Project Summary Southern Expressway Allan Block retaining walls have been used in more settings than anyone dreamed possible. Applications continue to come along adding to the system's list of successes. New latest success story comes all the way from "Down Under" in Adelaide, South Australia, where a well-known highway, the Southern expressway, was extended. This extension passes through the rolling landscape of the suburbs of Adelaide. To best utilize the space of the growing countryside, a single retaining wall was built over a two- mile span with heights up to approximately 17 ft (5.2 m). PROJECT NAME & LOCATION Southern Expressway, Adelaide, Australia PRODUCT AB Pitched Stones, AB Pitched Classic PROJECT SIZE 110,000 AB Units, 2 miles in length, 14.5 ft (

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