Portland Company
rolling stock manufacturer
The Portland Company was established 10 November 1846 by John A. Poor and Norris Locomotive Works engineer Septimus Norris as a locomotive foundry to build railroad equipment for the adjacent Portland terminus of the Atlantic and St. Lawrence Railroad connection between Portland, Maine, and Montreal. The shops opened for business in October, 1847. Its first locomotive, the Augusta, emerged from the shops in July 1848 for delivery to the Portland, Saco & Portsmouth (later part of the Boston and Maine Railroad). Over the next several decades, the company produced in its Fore Street facilities over 600 steam locomotives as well as 160 merchant and naval vessels, railcars, construction equipment, Knox automobiles, and the like. Portland Company built the engines of the civil war side-wheel gunboats Agawam and Pontoosuc. Taking into account its other products, the company could lay claim to being one of the leading medium-to-heavy steel manufacturers in New England. The company ceased production in 1978.
Presently, according to The Portland Company Complex website, the site has become marine-oriented, with a small marina, several marine and other office tenants and the Maine Narrow Gauge Railroad Co. & Museum.
This brief starts where responsible research should: with the source description of “Portland Company” as rolling stock manufacturer. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the general reference register because the source frames it as rolling stock manufacturer. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Oct 22, 2025. The linked authority identifier is Q7231907. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1846, 1847, 1848 and 1978.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
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Three-step research path
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This entry incorporates text from “Portland Company” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.