The I-29 & US 275 Interchange project is the first portion of a multi-phase, multi-year highway construction project. The Iowa DOT awarded the design to CH2M Hill and the overall work to Hawkins Construction. Menard USA was subcontracted to install Controlled Modulus Column (CMC)® and wick drains for ground improvement to support proposed embankment construction.
The site included seven contract areas. The project was impressive for Menard USA in that it had 8 load tests, the most CMCs installed in the US (over 15,000), and had 6 drill rigs operating at one time. Overall, it was a multifaceted, schedule driven project in a generally congested area.