{"id":2055,"date":"2026-07-27T15:50:00","date_gmt":"2026-07-27T19:50:00","guid":{"rendered":"https:\/\/www.ecoportal.net\/uk\/?p=2055"},"modified":"2026-07-27T15:50:00","modified_gmt":"2026-07-27T19:50:00","slug":"baltimore-new-key-bridge-maryland-longest","status":"publish","type":"post","link":"https:\/\/www.ecoportal.net\/uk\/baltimore-new-key-bridge-maryland-longest\/2055\/","title":{"rendered":"Baltimore’s new Key Bridge will be Maryland’s longest cable-stayed span at 11,015 feet"},"content":{"rendered":"

Foundation work is underway<\/strong> in Baltimore’s Patapsco River on the replacement for the Francis Scott Key Bridge, a new cable-stayed structure that will stretch 11,015 feet<\/strong> end to end and become Maryland’s first highway bridge of its type.<\/p>\n

The Maryland Transportation Authority has set a target opening date of late 2030, with an estimated construction cost now pegged at between $4.3 billion and $5.2 billion, up from earlier projections.<\/p>\n

A collapse that changed Baltimore overnight<\/h2>\n

The original Key Bridge, a 1.6-mile steel span, collapsed on March 26, 2024, after a container ship struck one of its piers.<\/p>\n

The collapse killed six construction workers<\/strong> who were filling potholes when the structure fell.<\/p>\n

Baltimore’s port was closed for months after the collapse, and increased traffic congestion has remained a problem for drivers across the region.<\/p>\n

The original bridge, built between 1972 and 1977, carried Interstate 695 across the mouth of Baltimore’s harbor and allowed drivers to bypass the city entirely.<\/p>\n

The MDTA has acknowledged the financial strain<\/strong> the loss placed on businesses and commuters across the state.<\/p>\n

What the new cable-stayed design looks like<\/h2>\n

Unveiled by Governor Moore on February 4, 2025, the replacement is Maryland’s first cable-stayed highway bridge, eclipsing the original steel truss design in both scale and safety.<\/p>\n

Stretching 11,015 feet, the structure features a 1,665-foot main span<\/strong> with 144 cables distributing weight evenly, flanked by marine and land approach spans.<\/p>\n

Two towers each standing more than 600 feet tall will support the main span, founded on 45 steel piles more than 200 feet long and 8 feet in diameter, with 20-foot thick footings.<\/p>\n

The bridge will carry four 12-foot travel lanes and 10-foot outside shoulders, with a minimum vertical clearance of 230 feet<\/strong> over the 800-foot federally authorized Fort McHenry Navigation Channel.<\/p>\n

That clearance exceeds what the original bridge offered, a deliberate design choice to reduce the risk of a repeat ship strike.<\/p>\n

How fast engineers are moving on design<\/h2>\n

Kiewit Infrastructure Co. won the contract in August 2024 and received notice to proceed on September 16, 2024.<\/p>\n

In March 2025, Kiewit conducted the first of two phases of wind tunnel testing<\/strong> on the proposed design to evaluate aerodynamic behavior under high wind conditions.<\/p>\n

In late November 2025, Kiewit submitted plans to MDTA for review at a 70 percent level of design completion.<\/p>\n

MDTA chief engineer Jim Harkness noted that reaching the 70 percent milestone<\/strong> on a structure more than two miles long in only 14 months is a pace that “can take five to seven years on average.”<\/p>\n

On August 14, 2025, crews began procurement of material for a temporary work trestle, a road built on pilings that lets equipment and concrete reach foundation sites over open water.<\/p>\n

The cost picture and what drives it higher<\/h2>\n

In November 2025, MDTA said the updated estimated cost would run between $4.3 billion and $5.2 billion, more than initially projected.<\/p>\n

The wide range reflects how much is still being finalized in a project of this complexity.<\/p>\n

Cable-stayed bridges are concrete intensive<\/a> structures, and material costs on major civil projects have been volatile across the industry in recent years.<\/p>\n

Labor availability<\/strong> and long lead procurement items continue to disrupt large projects, requiring proactive planning by contractors and owners alike.<\/p>\n

Foundation piling and specialized cable assemblies for a span this size must be ordered far in advance, locking in prices before conditions change.<\/p>\n

MDTA officials say they expect a clearer cost estimate<\/strong> as design work nears completion in the coming months.<\/p>\n

What the bridge means for Baltimore and the wider region<\/h2>\n

The United States is in the middle of the largest bridge construction and rehabilitation cycle in a generation, with the Federal Highway Administration classifying tens of thousands of bridges as structurally deficient in recent reporting cycles.<\/p>\n

Baltimore’s project stands apart because it is not a routine repair but a full replacement of a critical interstate link after a sudden, catastrophic loss.<\/p>\n

As of early 2026, demolition of the original structure is complete and foundation work is advancing<\/strong>, moving to restore the I-695 beltway bypass<\/a> for travelers who currently use Baltimore’s tunnels or city streets.<\/p>\n

Every day the bridge is absent, tens of thousands of drivers and freight trucks take longer, costlier routes around the harbor.<\/p>\n

The Port of Baltimore, one of the busiest on the East Coast for vehicle imports, also depends on clear channel access that the new higher clearance will help protect.<\/p>\n

Kiewit and MDTA hit a major design milestone<\/a> in roughly a year, a timeline engineers say could inform how future emergency replacements are procured on other structurally critical US bridges.<\/p>\n

The design is not yet finalized and cost pressures remain real, but the foundation work now advancing in the Patapsco River marks a firm commitment: Baltimore’s harbor will have its bridge back before the decade is out.<\/p>\n","protected":false},"excerpt":{"rendered":"

Foundation work is underway in Baltimore’s Patapsco River on the replacement for the Francis Scott Key Bridge, a new cable-stayed structure that will stretch 11,015 feet end to end and become Maryland’s first highway bridge of its type. The Maryland Transportation Authority has set a target opening date of late 2030, with an estimated construction … Read more<\/a><\/p>\n","protected":false},"author":11,"featured_media":2054,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-2055","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-construction"],"_links":{"self":[{"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/posts\/2055","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/comments?post=2055"}],"version-history":[{"count":1,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/posts\/2055\/revisions"}],"predecessor-version":[{"id":2140,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/posts\/2055\/revisions\/2140"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/media\/2054"}],"wp:attachment":[{"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/media?parent=2055"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/categories?post=2055"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoportal.net\/uk\/wp-json\/wp\/v2\/tags?post=2055"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}