Act 233 of 1875 - Canal or Harbor Companies (485.1 - 485.25)

Act 149 of 1869 - River Improvement Companies (485.101 - 485.129)

Act 91 of 1887 - Improvement of State Boundary Rivers (485.201 - 485.214)

Act 188 of 1889 - Improvement of Rivers for Logging (485.301 - 485.303)