On June 6, 2018, the Michigan Legislature repealed the state’s decades-old prevailing wage law. The repeal will go into effect immediately without the need for a signature from Governor Rick Snyder (who opposed the measure) because it was initiated through a ballot drive.
See here for more information: https://www.freep.com/story/news/2018/06/06/prevailing-wage-repealed-gop-michigan-legislature/678292002/