Geno Allessandrini of the Michigan Laborers District Council was appointed to the Mackinac Straits Corridor Authority on Wednesday, but resigned a day later for personal reasons.
The authority will oversee the construction and operation of a tunnel for a new oil pipeline in the straits.
Ari Adler, a spokesman for Governor Snyder, says the governor didn’t ask for the resignation.
"He did resign of his own free will, and he said that he was stepping aside for personal reasons," says Adler.
Snyder appointed Republican J.R. Richardson from the Department of Natural Resources as his replacement. Now the authority has two Republicans and one Democrat.
They will meet for the first time Wednesday Dec. 19 in Saint Ignace.