Whitney Bros.
Superior WI
Most recent update: August 31, 2021.
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| O/N | Customer | Type | LDT | LOA | Built | Notes | ||
| Hukey | 51 | 218026 | USSB | tugboat | 300 | 150 | June 1919 | A. G. Wells 1925, scrapped 1954 |
| Hulver | 52 | USSB | tugboat | 300 | 150 | July 1919 | ||
| Humaconna | 53 | 218071 | USSB | tugboat | 300 | 150 | July 1919 | Gregory J. Busch 1981 |
| Humrick | 54 | 218072 | USSB | tugboat | 300 | 150 | Aug 1919 | scrapped 1975 |
| Keshena | 55 | USSB | tugboat | 300 | 150 | Sep 1919 | ||
| Kiokee | 56 | USSB | tugboat | 300 | 150 | Oct 1919 | ||
| Kiron | 57 | 218729 | USSB | tugboat | 300 | 150 | Oct 1919 | A. L. Walker 1923, scrapped 1948 |
| Kitchi | 58 | USSB | tugboat | 300 | 150 | Nov 1919 | ||
| Kolda | 59 | USSB | tugboat | 300 | 150 | Nov 1919 | ||
| Kaleen | 60 | USSB | tugboat | 300 | 150 | Dec 1919 | ||
| William A. Whitney | 61 | 220054 | Whitney Bros. | tugboat | 145 | 100 | 1920 | Peggy D. Hannah 1993 |
| The Clyde | 168680 | Whitney Bros. | derrick barge | 277 | 122 | 1922 | ||
| Derrick #4 | 169844 | derrick barge | 277 | 122 | 1922 | |||
| M. Sullivan | 171625 | U.S. Dredge & Dock | dredge barge | 454 | 126 | 1933 | William Denny 1958, Sullivan 1966, NLD 1988 |