A $5.2 billion replacement for the collapsed Key Bridge, a $9.8 billion Purple Line laying its last track, a $6 billion tunnel under West Baltimore, and a $2.7 billion rail bridge over the Susquehanna headline Maryland'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.
19 major public projects are listed. The listed figures sum to ≈$29.6B — the largest state tally in this series so far, and it is honest to say why: three Northeast Corridor megaprojects (the $9.8B Purple Line P3 programme value, the ≈$6.0B Frederick Douglass Tunnel and the ≈$2.7B Susquehanna River Rail Bridge) plus the ≈$5.2B Key Bridge replacement account for about $23.7B of it. Bases differ and are labelled on every record — the Purple Line figure is a 30-year P3 programme value whose construction contract is $3.4B, the tunnel and Susquehanna figures are the FRA's 2026 inventory totals, and the Key Bridge figure is the top of MDTA's published range. This is a majors list, not a census of every city and county job in Maryland.
How the border and programme cases were handled: the American Legion Bridge / I-495 & I-270 programme is NOT listed — see the exclusions below. The Susquehanna River Rail Bridge is wholly in Maryland and is listed once here at the FRA total. I-81 Phase 2 is Maryland's own priced phase, distinct from Virginia's statewide I-81 programme record. The Purple Line is counted once at its programme value with the construction contract disclosed on the record; the Light Rail Modernization Program is counted once at its CTP programme total; Pimlico is counted at its $400M authorised bond figure, with the still-negotiated training-centre piece disclosed but not tallied; and Fort Meade is counted only for the one discrete building (NSAW East Campus Building #5, $965M) whose cost the Defense Department itself publishes.
News- and trade-flagged sources: several rows rest on news or trade-press reporting of official figures, flagged on their records — the Key Bridge estimate (Equipment World, MDTA figures, June 2026), the FRA inventory totals for the B&P Tunnel and Susquehanna bridge (Railway Supply, from the FRA's 2026 Northeast Corridor Project Inventory), the NIH SRLM budget (Construction Dive, NIH figures), I-81 Phase 2 (Herald-Mail, MDOT CTP figures), Pimlico (Paulick Report, Stadium Authority figures) and Penn Station (Mass Transit, Amtrak release). Each record names the underlying official source. The softest records on the page are Penn Station (Amtrak's $150M station figure against a $175M trade-press programme figure that includes the paused private buildings) and the Red Line (a programmed design figure the draft CTP has already cut and re-aimed at planning — printed with that cut on the record).
Deliberately excluded: the American Legion Bridge and I-495/I-270 Phase 1 South managed lanes — the original P3 collapsed when Accelerate Maryland Partners (Transurban) terminated its agreement in March 2023; a $2.4B federal grant application was denied and a $2.2B application was still pending at the FY2025 budget hearings; in January 2026 Governor Moore and Secretary Duffy agreed to reconsider a P3 and the final CTP moved design money up — but no construction funding, delivery structure or funded total exists, so the programme is excluded as unfunded-for-construction and named here rather than listed at design on unpriced design money. The Howard Street Tunnel in Baltimore is excluded by the owner rule: its owner is CSX, a private railroad, notwithstanding state and federal grant contributions toward its clearance project. Johns Hopkins University and Johns Hopkins Hospital builds are private and excluded. The Chesapeake Bay Bridge appears only as its Tier 2 bay-crossing STUDY — a study is not a build, and no discrete priced Bay Bridge capital project was verified. The Governor Thomas Johnson Bridge (MD 4) has engineering/study money only against a replacement concept estimated upwards of $500M — unfunded, excluded. Amtrak's Bush River ($18.8M) and Gunpowder River ($30M) bridge programmes are funded only through planning and project development in the FRA inventory — construction unfunded, excluded and named. WMATA capital is a programme-level contribution with no separately priced Maryland-station build verified. Completed in a prior year, however large: the Harry W. Nice–Middleton Bridge replacement (opened October 2022), UMD's Chemistry Building ($132M, opened April 2024), Morgan State's Health and Human Services building ($171M, opened 2024/25), the U.S. Naval Academy's Farragut Field seawall ($37.1M, completed 2025) and I-81 Phase 1 (completed 2020). No verified termination was found among Maryland's other majors in this cycle and no Maryland record is listed as suspended — Penn Station's paused piece is the private mixed-use expansion, disclosed on a station record whose Amtrak works continue.