Prairie du Sac Dam
The century-old Prairie du Sac Dam in Wisconsin was constructed on 12,000 timber piles. Over time, the piles began to deteriorate as the tailwater receded. Nicholson was awarded the remediation contract as the General Contractor and installed close to 1,000 micropiles in varying orientations and loading
combinations through the dam and constructed a reinforced concrete transfer beam as a means of permanently supporting the structure.