A busy Interstate 70 off-ramp in downtown St. Louis turned into a gaping crater on Saturday after three water mains burst, chewing through pavement and sending water pouring into a growing sinkhole just north of Biddle Street near Broadway, within sight of the Dome.
The collapse carved out a hole that quickly filled with water as city water crews hustled in to figure out what gave way. Workers were already in the area when the ground opened up and began securing the site as the cavity expanded.
According to the St. Louis Post-Dispatch, reporter Daniel Neman and photographer David Carson documented the damage, with Carson’s photos showing a hole roughly 20 feet across and about 15 feet deep. The outlet reports that three separate water mains broke and that city crews were working the scene while officials held off on naming a cause.
Where the hole opened
The sinkhole opened on the I-70 off-ramp just north of Biddle Street near North Broadway, a stretch that normally funnels drivers straight into the heart of downtown near the convention center and stadiums. Traffic that would usually glide off the highway into downtown now has to navigate around a torn-up lane and a whole lot of caution tape.
A widely shared thread on Reddit features on-the-ground reports and photos that match the off-ramp location. The images show the sinkhole eating into what appears to be a left-turn lane off the ramp, with the asphalt undermined and soil visibly scoured away beneath the surface.
Response and repairs
The City Water Division sent crews to track down valves, slow the torrent and get a look at the buried mains, according to the St. Louis Post-Dispatch. Fully fixing the problem will likely mean digging out the damaged lines, shoring up the ground and then installing permanent repairs, a process that can stretch from hours into days depending on what crews discover under the pavement.
Until that happens, the immediate area is expected to stay blocked off, and drivers should be ready for detours and delays near the ramp while the city trades one giant hole in the ground for a much smaller construction zone.
Why this matters
This downtown sinkhole comes on the heels of a run of water-system headaches around the metro this spring. In May, Hoodline reported multiple water main breaks and murky tap water in parts of St. Louis County, adding to frustration over the region’s aging infrastructure.
Engineers and officials have previously pointed to old pipes, pressure swings and shifting ground as factors in other local water main failures, and the latest collapse highlights the continuing maintenance and funding challenges for the area’s water system. For now, though, city officials have not linked Saturday’s sinkhole to any broader pattern, focusing instead on getting the ramp stable and the water lines back in working order.
