Print, Photographic

2016.072.016Photo

Print, Photographic

2018.110.336Photo

Certificate, Stock

2016.072.079Archive

Duluth-Superior Dredging Company

Letter

2016.072.107Archive

Dunbar & Sullivan Dredging Co.
Sugar Island, Non Conforming Use Registration and Petition for Certificate, Township of Grosse Ile, Michigan

Typescript

2016.072.012Archive

Dunbar & Sullivan History

Statement, Financial

2016.072.398Archive

Dunbar & Sullivan Dredging Company Employees' Retirement Plan

Print, Photographic

2016.072.157Photo

Print, Photographic

2016.072.156Photo

Print, Photographic

2018.110.324Photo

Print, Photographic

2016.072.155Photo

Letter

2018.110.271Archive

Dunbar & Sullivan Dredging Co.

Print, Photographic

2018.110.323Photo