Clark Construction’s 56-day overhaul of two Maryland Metro stations shows how much work can fit into a short shutdown when crews plan around tight access, aging records and limited rail logistics. The Bethesda and Grosvenor-Strathmore upgrades were completed on time and on budget, according to the Washington Metropolitan Area Transit Authority. That result says as much about preparation as it does about the pace of work: In a shutdown, crews have little room to absorb surprises once trains stop running.
Two stations, different scopes
At Bethesda, Clark Civil demolished structural elements in a 44-hour window in November 2025, then installed heavy steel, fireproofing and structural concrete. The sequence compressed demolition and rebuilding into a narrow period, leaving little time to resolve unforeseen conditions once the work was under way. The project also advanced a new mezzanine connecting the Red Line with the Maryland Transit Administration’s future Purple Line, which is slated to open next year. Bethesda station work is expected to continue through 2027, so the shutdown marked a major phase rather than the end of construction.
Three miles away, the Grosvenor-Strathmore station received its first major overhaul since opening in 1984. Crews used remote demolition robots to remove more than 18,000 square feet of platform tile and concrete topping slab, then replaced 1,200 linear feet of track edge along the 600-foot platform. That work addressed worn platform components across a confined rail setting, where demolition debris and replacement materials had to move through restricted access points. Clark says the station’s modernization is complete.
The Bethesda mezzanine has faced a substantial cost increase: The Washington Post reported in December 2024 that its estimated cost rose from $2.4 million in 2016 to $52 million. The figures refer to estimates at different points in the project’s development, and the available information doesn’t explain the causes of the increase. WMATA and Clark did not respond to Construction Dive’s request for current construction costs. That leaves an important gap in assessing the final price of the work, even as the agencies describe the shutdown projects as on budget.
Working around old plans and restricted access
Clark described the shutdown work as “a unique puzzle.” Scott Betteker, a project executive for Clark Civil, said teams spent months preparing during non-revenue nights to coordinate the work before the shutdown began. That preparation matters because subway projects depend on tightly sequenced access: crews, materials, inspections and equipment all need to reach the work area within the available window. The schedule can look simple on paper and still be vulnerable to a mismatch between plans and actual site conditions.
Site conditions often differed from the historical plans, which relied on hand-drawn schematics from the 1970s and 1980s. Crews had to reconcile those discrepancies and adjust structural connections within hours to keep the stations on schedule. Inspectors remained on call throughout round-the-clock operations, Betteker said. This is more significant than it looks: old drawings can provide a starting point, but underground construction still requires crews to verify what’s physically in front of them before connecting new work to existing structures.
One rail access yard and a single crane supplied both projects, making just-in-time deliveries essential. With rail power cut, equipment had to arrive by diesel locomotive and flatbed car. At Bethesda, compact spider cranes fit through narrow corridors and worked inside the station’s curved vault. There was little slack in that arrangement. If a delivery arrived out of sequence, the bottleneck could affect more than one task because both projects depended on the same limited access and lifting resources.
Concrete work under summer heat
High summer temperatures pushed crews to schedule concrete pours for 4 a.m. to keep mix temperatures below 95 degrees. That choice reflects a familiar constraint in concrete work: heat can shorten the time available to place and finish a mix, while the underground setting limits options for moving equipment and material. The early start shifted the work into cooler hours, but it also made coordination with the rest of the overnight operation more demanding.
Bethesda presented another constraint: there was no direct vertical route for pumping concrete to the mezzanine. Clark ran a 500-foot pipe from an above-ground vent shaft through the access tunnels and used a custom mix designed to travel that distance without clogging. The solution depended on both the route and the material behaving as planned. In a confined station, a blocked line would threaten the pour schedule and create additional cleanup in an area already difficult to access.
What the work signals for future upgrades
The completed Grosvenor-Strathmore work and ongoing Bethesda construction reflect the demands of upgrading active transit infrastructure within confined underground sites. A short shutdown can concentrate disruptive work, but it doesn’t eliminate the need for long-term preparation, field verification and follow-on construction. The contrast between the finished platform work and Bethesda’s continuing build also shows why a single shutdown milestone shouldn’t be mistaken for a project’s final completion.
If you’re working in this space, the lesson is practical: access, equipment and reliable knowledge of existing conditions can shape the schedule as much as the construction task itself. (And this is the part most people overlook.) Tight logistics leave little room for improvisation. The Purple Line connection’s remaining work is tied to Bethesda’s 2027 completion target—a clear milestone, though the available account doesn’t detail the work still ahead.
