TheInterlake Steamship Company is an Americanfreight ship company that operates a fleet on theGreat Lakes inNorth America.^[1][2][3] It is now part ofInterlake Maritime Services.

The company ischaired byJames R. Barker, with his son, Mark W. Barker, serving asPresident. Paul R. Tregurtha serves as Vice-Chairman of the company.^[4]

The firm was founded in 1913 when a consortium of firms bought out the seventeen vessels of the Gilchrist Company, which had gone into receivership.^[5] The other firms were: the Lackawanna Steamship Company, the Acme Steamship Company, the Standard Steamship Company, the Provident Steamship Company and the Huron Barge Company. The combined fleet operated 56 vessels.

When Interlake launched its largest vessel,MVWilliam J. Delancey (now MVPaul R. Tregurtha), its fleet contained 151 vessels, and was capable of carrying over three million tons of cargo at one time.^[6]

In early 2018, Interlake established a subsidiary service known as Interlake Logistics Solutions. Although its existing freight services were focused on bulk raw materials, the new service offered shipping of finished goods. The Barker and Tregurtha families, owners of Interlake Steamship,chartered the 418-foot (127 m), 14,000 short tons (13,000 t) bargeMontville to provide this new service on an as-needed basis.^[7]

In April 2019, Interlake Steamship announced construction of a 639-foot (195 m) long, 75-foot (23 m) wideRiver-class self-unloading bulk freighter. The vessel, built byFincantieri Bay Shipbuilding inSturgeon Bay, Wisconsin, was the first U.S.-flagged,Jones Act-compliant ship built on the Great Lakes since 1983.^[8] and the first built by Interlake since 1981.^[9] The ship waschristenedMVMark W. Barker inCleveland, Ohio^[8] on 1 September 2022.^[10]

In December 2020,SS Badger was acquired by the Interlake Steamship Company.^[11] The deal also included acquisition of the tugUSS Undaunted (ATA-199) (renamed MTUndaunted), deck bargeSS City of Midland 41 (renamed ATBPere Marquette 41), and SSBadger sister shipSS Spartan, currently in long-term lay-up.^[11][12] This was a part of a larger sale of assets. TheMiddleburg Heights, Ohio-based Interlake Holding Company acquired the assets ofLake Michigan Car Ferry Company, based inLudington, Michigan.^[13]

The Interlake Steamship Company Vessels^[14]

image	name	launch date	retired	notes
	ATBPere Marquette 41	1940	1988	Currently an articulated tug barge with the tug MTUndaunted[11] Constructed as SSCity of Midland 41
	MV Lee A. Tregurtha	1942		Constructed as USSChiwawa for theUnited States Navy, later renamed SSWalter A. Sterling and SSWilliam Clay Ford (II)
	SSFrank Armstrong	1943	1987[15]	The fourth ship originally constructed for theU.S. Maritime Commission[16][17] Sold for scrap to Turkish Shipbreakers in 1988
	MTUndaunted	1944		Currently an Auxiliary Fleet Tug on the Great Lakes[11] Built asUSS Undaunted (ATA-199)
	SS Badger	1952		The last, and largest, coal-fired, steam engine car-ferry constructed in the United States[11]
	MV Kaye E. Barker	1952		Constructed as SSEdward B. Greene, later renamed SSBenson Ford (III)
	SS Spartan	1952	1979	Currently on long-term lay-up inLudington, Michigan[11]
	Dorothy Ann-Pathfinder Tug-Barge	1953		Constructed asSSJ. L. Mauthe, later renamedPathfinder, a self-unloading barge paired with theZ-drive tugDorothy Ann in 1999
	MVHonorable James L. Oberstar	1958		Constructed as SSShenango II, later renamed SSCharles M. Beeghly
	SSJohn Sherwin	1958	2008	Currently on long-term lay-up at the Interlake Steamship Company Dock inDeTour, Michigan
	MVHerbert C. Jackson	1959		Has always sailed for the Interlake Steamship Company Constructed atGreat Lakes Engineering Works at the same time of theSS Edmund Fitzgerald
	MVStewart J. Cort	1972		First 1000-foot vessel on the Great Lakes, the only 1000-foot vessel with pilothouse forward
	MVJames R. Barker	1976		Third 1000-foot vessel on the upper Great Lakes[18]
	MVMesabi Miner	1977		Fourth 1000-foot vessel on the upper Great Lakes[19]
	MVPaul R. Tregurtha	1981		Thirteenth 1000-foot vessel on the upper Great Lakes[6] Built as MVWilliam J. Delancey[6] Flagship for the Interlake Steamship Company Longest ship ever to operate on Great Lakes Queen of the Lakes since 1981
	MG Winfield Scott (LT-805)	1993	2021	Currently on long-term lay-up inLudington, Michigan[11]
	MVMark W. Barker	2022		The first Great Lakes bulk carrier that was constructed on the Great Lakes in more than 35 years The first ship on the Great Lakes with engines that meetEPA Tier 4 emissions standards FirstJones Act-compliant vessel on Great Lakes in four decades.[8]

• Interlake Steamship Company

• Interlake Maritime Services
• Interlake Maritime Services subsidiaries
• Transport companies established in 1913
• Shipping companies of the United States
• American companies established in 1913
• Great Lakes shipping companies
• Great Lakes

• Articles with short description
• Short description matches Wikidata