Minnesota's landslide risk concentrates along the Mississippi and Minnesota River bluffs and Lake Superior's North Shore, where extreme freeze-thaw cycling — Minnesota sees some of the widest annual temperature swings of any state in this program — progressively fractures till and shale into a loosened mass that MnDOT's river-bluff corridors experience as recurring, worsening slope movement.
GSI sees this alongside other Steep Slope Stability Issues work across the state's infrastructure network.
GSI's soil nail walls for Minnesota's river bluffs are designed around the state's extreme freeze-thaw range, using corrosion and fatigue-rated hardware suited to temperature swings from -30°F to over 100°F annually. GSI's soil nailing experience informs this approach.
Spring snowmelt infiltration into freeze-thaw-fractured till drives most Minnesota bluff reactivation — horizontal drains intercept that seasonal pulse specifically, rather than managing groundwater at a constant assumed rate. This draws directly on GSI's Soil Nail Launcher™ work.
Till that has been fractured by Minnesota's extreme freeze-thaw cycling often cannot hold a conventional borehole open through installation — the Soil Nail Launcher™ avoids that dependency entirely. GSI's horizontal drains capability supports this step.
Where relevant, landslide emergency response is factored into the Minnesota project plan from day one.
Engineered for Minnesota's conditions. GSI engineers Minnesota slope repairs for the state's extreme freeze-thaw range — hardware and sequencing suited to temperature swings most other states' slopes never experience. This is reinforced by GSI's work in general contractors and asset owners.
Design/build delivery. The same organization designs and installs — avoiding the miscommunication between separate design and build firms.
MnDOT specification compliance. Project documentation and field methods comply with state DOT standards beginning with the first engineering package.
MnDOT partners and Minnesota infrastructure owners describe GSI's landslide repair results.
GSI's engineers are ready to assess landslide repair conditions at your Minnesota site.