Union Shipbuilding
Baltimore MD
Most recent update: August 24, 2021.
Union Shipbuilding Company was established in 1916 by the Riter-Conley Manufacturing Co. of Pittsburgh, a large industrial steel fabricator: the site was in the Fairfield section of Baltimore, on the west side of the harbor, where in 1913 Ellicott Machine Corp. had opened a yard to build dredge hulls. Riter-Conley's President, Thomas Riter, died in 1916, however, and the business was sold to McClintic-Marshall Co., who retained ownership until WWII, when it was acquired by the US government and became part of the Bethlehem Fairfield Shipyard.
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| O/N | Name | Customer | Type | GT | Delivered | Notes | |
| 1 | 215916 | Monongahela | Gulf Refining Co. | tank barge | 1,677 | Apr 1918 | |
| 2 | 216378 | Ohio | Gulf Refining Co. | tank barge | 1,677 | June 1918 | |
| 3 | 218433 | Hermitage | Aluminum Co. of America | schooner barge | 2,111 | 1919 | |
| 4 | 218864 | Dykes | Aluminum Co. of America | schooner barge | 2,072 | Sep 1919 | reefed off NJ 1983 |
| 5 | barge | 1918 | |||||
| 6 | barge | 1918 | |||||
| 7 | 219874 | George B. Mackenzie | American Bauxite Co. | freighter | 3,212 | 1919 | |
| 8 | 220320 | John R. Gibbons | American Bauxite Co. | freighter | 3,212 | 1920 | later Ingerto, captured by Germany 1940, bombed and sunk 1945 |
| 9 | 220261 | Winthrop | Demerara Bauxite Co. | tugboat | 189 | 1920 | to British Guyana 1923 |
| 10 | freighter | 7,150 | not built | ||||
| 11 | freighter | 7,150 | not built | ||||
| 12 | freighter | 7,150 | not built | ||||
| 13 | freighter | 7,150 | not built | ||||
| 14 | 221003 | Gulfking | Gulf Refining Co. | tanker | 6,560 | Jan 1921 | |
| 15 | 221213 | Gulfprince | Gulf Refining Co. | tanker | 6,560 | May 1921 | torpedoed and scrapped 1943 |