Three Rivers receives four ABC Greater Michigan Awards Dec. 22, 2020 FacebookTwitterEmail Three Rivers Corporation received three Gold Excellence in Construction Awards and a Platinum award in the Safety Training & Evaluation Process (STEP) from Associated Builders and Contractors of Greater Michigan. (Photo provided) Three Rivers Corp. received three Gold Excellence in Construction Awards and a Platinum award in the Safety Training & Evaluation Process (STEP) from Associated Builders and Contractors of Greater Michigan at the Excellence in Construction 2020 Awards. Shelterhouse in Midland won the Gold Award for best GC/CM: New Construction - $5-$10 Million. This is a design/build of the 25,000-square-foot building containing 15 suites, each designated for a single family. Each suite has its own living space and kitchen area. Two suites were designed specifically to be wheelchair-accessible.