Duncan Robertson's shipyard operated from 1870 to 1894 and built at least sixty vessels. If anyone can provide any further information about this shipyard or add to the table below, please e-mail me at timcolton@aol.com
| Name | Owner | Type | Built | Disposition |
| Robert Howlett | John Connelley | Schooner | 1870 | Scuttled off Chicago 1905 |
| Wolverine | William Schlosser | Schooner | 1871 | Abandoned 1909 |
| City of Grand Haven | Orin W. Angwall | Schooner | 1872 | Abandoned 1920 |
| City of Grand Rapids | Cornelius Anderson | Schooner | 1873 | Abandoned 1903 |
| Willie Loutit | Charles Donahue | Schooner-Barge | 1873 | Abandoned 1908 |
| William H. Dunham | Lors D. Ludwig | Schooner | 1873 | Stranded 1902 |
| Ottawa | Clause Weberg | Schooner | 1874 | Sank 1911 |
| Tempest | Well & Eber | Steamer | 1876 | Destroyed by fire 1909 |
| City of Grand Rapids | Wiarton Shipbuilding | Steamer | 1879 | Destroyed by fire 1907 |
| Stephen C. Hall | Davidson & Smith | Steamer | 1880 | Later W. H. Ritchie 1921, destroyed by fire 1921 |
| Albert Soper | Greiling Brothers | Steamer | 1881 | Abandoned 1920 |
| Robert G. Weddell | White & Friant | Barge | 1881 | Scrapped 1939 |
| Charles E. Wyman | Albert Bolster | Schooner | 1882 | Wrecked 1919 |
| White and Triant | Albert Bolster | Schooner | 1882 | Converted to barge 1901 |
| Thomas Friant | Captain Einar Miller | Steamer | 1884 | Sank after being damaged by ice flows 1924 |
| Alice M. Gill | Kelley Island Lime | Steamer | 1887 | Scrapped following fire 1935 |
| Thomas R. Scott | Peninsula Tug & Towing | Steamer | 1887 | Sank 1914 |
| Charles A. Street | Joseph B. Lozen | Steamer | 1888 | Destroyed by fire 1908 |
| Mary H. Boyce | Paterson | Steamer | 1888 | Destroyed by fire 1928, scrapped 1936 |
| Mary A. McGregor | Potter-Teare Transit | Steamer | 1889 | Ran on rocks, caught fire and destroyed 1920 |
| Sachem | D. O. Lockhart | Steamer | 1889 | Destroyed by fire 1928 |
| Ionia | Canada Steamship | Steamer | 1890 | Later Fairfax 1912, Maplegorge 1920, scuttled 1925 |
| Theora | John Parker | Fish Tug | 1893 | Scuttled 1929 |
| Pentland | A. R. Hinckly | Steamer | 1894 | Abandoned after colliding with breakwall at Port Colborne 1928 |