INCA structural design for retaining walls for transportation and navigation projects totals over 2 million-square feet. Wall types include diaphragm walls (secant drilled shaft or slurry), soldier pile with or without tie-backs, soil nail, reinforced concrete cantilever, structural earth, crib wall, gabion, cast-in-place concrete, tie-back, and noise barrier walls.

Representative Projects:

• I-90 Corridor Retaining Walls
• Coal Creek Parkway
• Des Moines Memorial Bridge