A $1.73 billion dry dock expansion at Portsmouth Naval Shipyard, two new University of Maine buildings in Orono, a relocated Downeaster station for Portland and three new ferries headline Maine's public pipeline.
*How to read the total: the sum of the published figures in the list below. Bases differ by project — most are total cost estimates, some are federal grants, program totals, or construction contracts as awarded. Each project's expanded view labels its own basis. We add them up with the labels showing rather than pretend they're all the same kind of number.
Hover a pin for the project snapshot. Pin numbers match the project list below. Locations are approximate (nearest city or corridor midpoint) on a schematic state outline.
Click any project to expand its full record — description, owner, dates, funding, the law behind it, and its source. Filter by who owns it and where it stands, or sort by cost.
18 major public projects are listed. The listed figures sum to $2,395,349,332 (≈$2.4B) — and more than 72% of that total is a single federal record, the $1,731,477,644 Dry Dock #1 contract at Portsmouth Naval Shipyard in Kittery. Bases differ and are labelled on every record: firm contracts, published totals, committed funding and two grant-basis records. This is a majors list, not a census — MaineDOT's 2026–2028 work plan alone carries 2,798 projects worth $4.5B, almost all below this page's $10M published-figure threshold or without a published project total of their own.
How the border and corridor cases were handled: the Piscataqua River Bridge (I-95, Kittery–Portsmouth) is listed once here at its full $20M published painting-phase estimate — MaineDOT administers the work and costs split 50/50 with New Hampshire, whose page carries a pointer only. The Sarah Mildred Long Bridge has no priced current phase (its replacement opened March 30, 2018) and is not listed. The Downeaster tie-replacement programme is listed once here by NNEPRA, Maine's rail authority, although the corridor continues through New Hampshire. Portsmouth Naval Shipyard sits on Seavey Island in Kittery, Maine — federal, and Maine's.
News- and trade-flagged sources: several rows rest on news or trade-press reporting of official figures, flagged on their records — the Presque Isle Bypass (WCYY, MaineDOT bid figures), the Bangor Broadway Bridge (New England Construction, MaineDOT figures), the Aroostook River Bridge (Bangor Daily News, MaineDOT work plan), the International Marine Terminal reefer yard (Mainebiz, MARAD grant) and the Exit 4 ramp (Mainebiz). The softest records on the page are the IMT reefer yard (counted at its $14.2M grant against a higher ≈$17.8M component estimate), the Battery Steele ferry (a $25M trade-press cost figure, with the delivery timeline taken from Casco Bay Lines' own September 2026 update) and the Bangor Broadway Bridge (a $30.6M budget from a single trade account).
Deliberately excluded: MaineHealth and Maine Medical Center are private nonprofits, and all private builds are excluded with them — Bath Iron Works, the private utilities (Central Maine Power, Versant) and private colleges among them. Terminated: the Gorham Connector (Maine Turnpike Authority) — estimated at $331M or more, studied since 2001 with over $18M spent, paused on March 6, 2025 and then dropped; verified terminated, so it is named here and never listed as suspended. Unfunded: the Sears Island offshore wind port at Searsport ($760M estimate) — its $456M federal grant application was denied in October 2024, so there is no funded project to list. Completed in a prior year, however large: the I-395/Route 9 Connector ($107M, opened June 2025), the Madawaska–Edmundston International Bridge ($97.5M, opened June 2024) and its companion U.S. port of entry ($65M, 2024), the University of Southern Maine's Crewe Center for the Arts ($63M, opened October 3, 2025), the Piscataqua River Bridge rehabilitation ($52.6M, completed 2022), the Sarah Mildred Long Bridge replacement ($158.5M, opened 2018) and the Matinicus ferry Charles Norman Shay (≈$11.7M, commissioned 2024). The Portland International Jetport's gate expansion is described by the airport as recently completed, and the largest verified current Jetport figure is an $11.3M FY2025 FAA grant with no published project total above threshold, so no Jetport record is listed. Two 2026 completions ARE listed under the current ruling — UMaine's GEM building (opened summer 2026) and NNEPRA's Downeaster tie replacement (completed mid-August 2026) — while the Frank J. Wood Bridge, whose new span opened December 12, 2025, stays listed as under construction because finishing work and demolition of the old bridge run through late 2026.