Delaware's limited relief means landslide risk concentrates on the steeper stream-cut slopes along the Piedmont's western edge near I-95 and the Brandywine corridor, where fill embankments built decades ago on marginal Coastal Plain sediments are now showing the differential settlement and slope creep typical of underengineered original construction meeting modern traffic loads.
This pattern is consistent with the broader Steep Slope Stability Issues challenges GSI addresses across the state.
Soil nail reinforcement stabilizes Delaware's aging fill embankments by anchoring into the more competent natural ground beneath the historically placed fill, rather than attempting to compact fill that was never properly engineered. GSI's soil nailing capability supports this step.
Delaware's Coastal Plain sediments hold groundwater close to the surface — horizontal drains lower that water table locally along the embankment to reduce the pore pressure driving continued creep. This is one application of GSI's broader Soil Nail Launcher™ expertise.
Where original fill placement was inconsistent, soil composition varies enough within a single slope that the Soil Nail Launcher™'s no-excavation installation avoids the unpredictable borehole conditions conventional drilling would encounter. GSI's horizontal drains experience informs this approach.
This approach is informed by GSI's broader landslide emergency response work across Delaware.
Engineered for Delaware's conditions. GSI's Delaware repairs are engineered around the specific weaknesses of decades-old, underengineered fill embankments — not new-construction slope standards that don't reflect what's actually in the ground. It's backed by GSI's broader general contractors and asset owners capability.
Design/build delivery. A single team handles design and construction — avoiding the coordination failures that split design and build.
DelDOT specification compliance. Design documentation and construction practices meet DOT specifications starting with the first design package.
DelDOT partners and Delaware infrastructure owners describe GSI's landslide repair results.
GSI's engineers are ready to assess landslide repair conditions at your Delaware site.
