A fiber optic boring drill punched through a 16-inch crude oil line at 3 a.m. in East Los Angeles, and 2,400 gallons reached the river before anyone closed the valve
Black crude oil began bubbling up through asphalt at Eastern Avenue and East Cesar Chavez Avenue in East Los Angeles just after 3 a.m. on a Friday in late May.
Within minutes it was sheeting across the intersection.
By the time a valve was found and closed, the oil had entered the nearest storm drain and was moving toward the Los Angeles River.
Directional drilling steers a rotating drill head underground in a controlled arc, letting crews thread fiber under roads and buildings without opening the pavement.
What happened under that street corner explains why spills like this are so hard to stop once they start.
How a boring drill punched through a crude oil line beneath a city street
The mechanism was straightforward. A boring crew conducting directional drilling for a fiber optic line struck the 16-inch petroleum pipeline, sending crude oil onto streets and into storm drains. Directional drilling steers a rotating drill head underground in a controlled arc, letting crews thread fiber under roads and buildings without opening the pavement.
The pipeline was ruptured in two separate places, meaning two distinct release points. Pressure inside a crude oil transmission line is enough to push oil outward faster than most people expect, and the spill was running at roughly five gallons per second before anyone shut it off. At that rate, the volume of a standard bathtub empties into the street every four seconds, so the clock started the moment the drill bit made contact.
Thirty minutes and 3.4 miles of storm drain between the drill bit and the river
It took approximately 30 minutes to shut off the valve, which sits near Dodger Stadium, a significant distance from the rupture point. Finding and closing a buried valve on a transmission line in the dark, in an urban neighborhood, while oil rises on the street above, is not a quick operation.
Hazardous materials crews were on scene in an effort to block the storm drain, but the fire department said the flow of the oil was too strong and some of it made it in. Once inside the storm drain network, crude is nearly impossible to intercept. Initial cleanup covered nearly 3.4 miles of storm drain, and the spill later reached the Los Angeles River and was moving downstream toward Long Beach and the ocean, with wildlife officers from the state fish and wildlife agency already en route.
What the records show: the pipeline, the operator, and the drilling contractor
The pipeline is operated by a major California crude oil transmission company that has held the asset since 2006. The operator issued a statement the same morning describing a release after “the underground line was reportedly struck by an unaffiliated telecommunications contractor.” Spill report updates from the California Office of Emergency Services indicate that the reported cause of the spill was “human error.”
The telecommunications firm identified in news reports as the boring contractor is one of the companies awarded a contract for the Broadband for All plan, a $6 billion state and federal investment to close the digital divide. Because the two companies are separate legal entities, the question of who bears the cleanup bill is not simple. In a June 1 statement, the contractor responsible for installing the fiber optic lines said the pipeline operator failed to properly mark the line’s location before the excavation work began. Nearly 80 oiled birds were found along the river corridor in the days after the spill.
The broader problem this street corner made visible
Urban crude oil pipelines and broadband infrastructure now share the same narrow underground corridors beneath American cities, and the gap between their mapping systems is a recurring source of conflict. Directional boring has become the standard method for threading fiber through dense neighborhoods precisely because it avoids tearing up pavement, but it relies on accurate utility location data.
When that data is incomplete, or a bore path strays from its plan, the consequences surface fast. About 10,000 miles of fiber optic cable is being installed throughout California, including more than 500 miles in Los Angeles County. That exposure echoes the pattern described in coverage of a leak response that ended in a house explosion after ground movement pulled a fitting apart underground. The common thread is a mismatch between what crews expect to find underground and what is actually there.
What came next, and what remains unresolved
The pipeline has been shut down, and crews excavated and repaired the line, with the damaged section fully restored. Streets reopened after several days of closures that disrupted nearby residents, businesses and schools. According to LA County’s recovery page on the incident, the underground pipeline broke when a private telecommunications crew was installing fiber optic cable.
The soil investigation report will provide testing results and recommend next steps, with the county working alongside the water board to determine the scope of remediation required. That process can take months, and the full extent of subsurface contamination rarely becomes clear until sampling is complete. The deeper question the incident leaves open is procedural: who verifies that a boring plan clears every buried energy line before the drill head turns? For context on how much energy moves through ground that looks ordinary from above, the geology beneath apparently exhausted basins holds similar surprises.
No charges had been filed as of publication, and the full investigation had not concluded. The pipeline was back in service, the intersection was open, and the river was cleaner. What the ground beneath Eastern Avenue still holds, the soil report will eventually say.
Hugo is an engineer with strong technical expertise. Multilingual from an early age, his writing combines technical clarity with a strong interest in science and energy.
