Mosinee Waste Treatment Plant 200 Fremont St Mosinee, WI 54455 Phone : (715) 693-6454 Business Category Government Offices-City Village & Twp Legislative Bodies Mosinee City Administrator--waste Treatment Plant Mosinee, WI 54455 Phone : (715) 693-6454 Business Category Government Offices-City Village & Twp General Business Services Business Consulting Services Government Offices State & Local Government Offices & Public Schools