The names of the drains in this area are believed to be switched.   The label for Chrissman Drain, running largely south, is actually Plum Brook, and the Plum Brook, slightly above it to the Northeast running east is Chrissman.
Evidence:   Macomb County Drain Map: https://publicworks.macombgov.org/sites/default/files/content/government/publicworks/pdfs/Maps/City%20of%20Sterling%20Heights.pdf