Portland Company
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. 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 and. 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 a marine-oriented complex with a small marina, several marine as well as other office tenants and the Maine Narrow Gauge Railroad Co. & Museum.
5'6"-gauge locomotives for the Atlantic and St. Lawrence Railroad
| Works number | Date | Type | Weight | Drivers | Cylinders | A&StL# | Name | GTR # |
| 2 | September 1848 | 4-4-0 | 23 tons | 60" | 15x22 | 1 | Montreal | 101 |
| 5 | 30 December 1848 | 4-4-0 | 23 tons | 60" | 15x22 | 2 | Machigonne | 102 |
| 6 | 24 February 1849 | 4-4-0 | 22 tons | 60" | 15x22 | 3 | Oxford | 103 |
| 8 | 16 May 1849 | 4-4-0 | 24 tons | 60" | 14x20 | 4 | William P. Preble | 104 |
| 13 | 30 December 1949 | 4-4-0 | 22 tons | 66" | 15x20 | 5 | Waterville | 105 |
| 14 | 1 February 1850 | 4-4-0 | 22 tons | 66" | 15x20 | 6 | Coos | 106 |
| 18 | 1850 | 4-4-0 | 25 tons | 60" | 15x20 | 26 | Jenny Lind | |
| 19 | January 1851 | 4-4-0 | 22 tons | 60" | 15x20 | 7 | Felton | 107 |
| 20 | June 1851 | 4-4-0 | 24 tons | 54" | 17x22 | 8 | Railway King | 108 |
| 28 | December 1851 | 4-4-0 | 22 tons | 60" | 14x20 | 9 | Casco | 109 |
| 29 | January 1852 | 4-4-0 | 22 tons | 66" | 15x20 | 10 | Forest City | 110 |
| 30 | March 1852 | 4-4-0 | 20 tons | 60" | 13x20 | 11 | Danville | 111 |
| 31 | 1852 | 4-4-0 | 23 tons | 60" | 13x20 | 27 | Consuelo | |
| 32 | May 1852 | 4-4-0 | 22 tons | 60" | 14x22 | 12 | Falmouth | 112 |
| 36 | 11 November 1852 | 4-4-0 | 22 tons | 60" | 15x20 | 13 | Daniel Webster | 113 |
| 40 | January 1853 | 4-4-0 | 24 tons | 60" | 16x22 | 14 | Cumberland | 114 |
| 41 | April 1853 | 4-4-0 | 24 tons | 60" | 16x22 | 17 | Norway | 117 |
| 42 | 27 January 1853 | 4-4-0 | 21 tons | 66" | 14x22 | 15 | Nulhegan | 115 |
| 43 | 11 April 1853 | 4-4-0 | 23 tons | 72" | 15x22 | 16 | Paris | 116 |
| 44 | 24 June 1853 | 4-4-0 | 23 tons | 66" | 15x22 | 20 | Gloucester | 120 |
| 45 | 23 May 1853 | 4-4-0 | 24 tons | 60" | 15x22 | 18 | Yarmouth | 118 |
| 46 | June 1853 | 4-4-0 | 24 tons | 60" | 15x22 | 19 | Amonoosuc | 119 |
| 48 | 20 September 1853 | 4-4-0 | 24 tons | 60" | 16x22 | 21 | Vermont | 121 |
| 49 | 16 November 1853 | 4-4-0 | 22 tons | 72" | 14x22 | 22 | Gorham | 122 |
| 56 | 1 December 1853 | 4-4-0 | 23 tons | 72" | 15x22 | 23 | J.S.Little | 123 |
Two-Foot Gauge Locomotives
In 1890, The Portland Company acquired patterns used by the Hinkley Locomotive Works for 2-foot gauge locomotives. Portland improved the pattern into the most successful design on Maine's 2-foot gauge railroads. The Portland design retained ornate Victorian features including capped domes and a cab roof with graceful reversing curvature. The first of the design was the heaviest and most powerful locomotive on any of the Maine 2-foot gauge railroads at the time of delivery. Portland locomotives became the standard for passenger service as larger freight engines were built. Portland locomotives were subsequently used for yard service and on lines with lighter rail. Portland Company was the dominant manufacturer of freight cars for the Maine 2-foot gauge railroads between 1890 and 1907.The final 2-foot gauge locomotive built by The Portland Company was a less successful enlargement of the original design. Vulcan Iron Works built two modernized versions of Portland's basic design for the Monson Railroad in 1913 and 1918 after Portland Company ceased manufacture of railway locomotives. The basic Portland design pulled the last Kennebec Central Railroad train in 1929, the last Wiscasset, Waterville, and Farmington Railway train in 1933, and the last Monson Railroad train in 1943.
| Works number | Date | Type | Weight | Railroad | Number | Notes |
| 615 | 7 October 1890 | 0-4-4 Forney locomotive | 18 tons | Phillips and Rangeley Railroad | 1 | became Sandy River and Rangeley Lakes Railroad #7 |
| 616 | 22 October 1890 | 0-4-4 Forney locomotive | 18 tons | Sandy River Railroad | 4 | became Sandy River and Rangeley Lakes Railroad #5 |
| 621 | December 1890 | 0-4-4 Forney locomotive | Kennebec Central Railroad | 2 | ||
| 622 | 2 May 1891 | 0-4-4 Forney locomotive | 18 tons | Sandy River Railroad | 5 | became Sandy River and Rangeley Lakes Railroad #6 then Kennebec Central Railroad #4 then Wiscasset, Waterville and Farmington Railway #9 preserved |
| 624 | 14 April 1892 | 0-4-4 Forney locomotive | 19 tons | Bridgton and Saco River Railroad | 3 | became Kennebec Central Railroad #3 then Wiscasset, Waterville and Farmington Railway #8 |
| 626 | November 1894 | 0-4-4 Forney locomotive | 19 tons | Wiscasset and Quebec Railroad | 2 | |
| 627 | November 1894 | 0-4-4 Forney locomotive | 19 tons | Wiscasset and Quebec Railroad | 3 | |
| 628 | November 1906 | 2-4-4 Forney locomotive | 27 tons | Bridgton and Saco River Railroad | 5 |
Preserved Portland locomotives
The following locomotives built by Portland have been preserved.| Serial number | Wheel arrangement | Build date | Operational owner | Disposition |
| 233 | 4-4-0 | 1872 | Grand Trunk Railway number 40 | Canada Science and Technology Museum |
| 622 | 0-4-4T Forney locomotive | 2 May 1891 | Sandy River Railroad number 5 Sandy River and Rangeley Lakes Railroad number 6 Kennebec Central Railroad number 4 Wiscasset, Waterville and Farmington Railway number 9 | Wiscasset, Waterville and Farmington Railway |