GRS-IBS

The bridge over a railway was closed for two decades before Rock County, MN, could afford to replace it. The new bridge is Minnesota’s first Geosynthetic Reinforced Soil Integrated Bridge System(GRS-IBS) and an economical option for the County. Construction of the bridge was completed in less than two months.

Keefer Road Bridge was too deteriorated for repairs, and needed replacing. The engineering team led by Williams & Works, Grand Rapids, MI, wanted to move beyond using standard CMU for the abutment structures and instead use segmental retaining wall (SRW) as the facing material. It could be dry-stacked and met …

An old, deteriorating trestle bridge above an historic trail in Tallahassee, FL, was scheduled for replacement. Orange Avenue Bridge sits above the intersecting bike and pedestrian trail portions of St. Marks Trail. Replacing the 60-foot (18.3-m) bridge would be straightforward in most circumstances. But this short-span bridge