The mailing address here is Washington Michigan. Clifton Mills is nearby. There are Clifton's in Keweenaw and Jackson counties also.
From Michigan Place Names
Macomb County: the site of a mill which had burned down at least as early as 1840, about 1855, Neil and Hugh Gray, brothers, founded Gray's Mills on the site and around them gathered quite a little settlement. It was platted as a village [Eldredge]