Posts tagged “infrastructure”
I don’t usually link to this kind of stuff. As it is related to energy and physical infrastructure — and is a different type of failure than we’re used to — I think it is worth some thought. The story was originally covered by the WSJ and Foreign Policy; both of those articles are behind paywalls.
The strike against the power plant sounds surgical. The WSJ outlined the timeline of events:
At 12:58 a.m., AT&T fiber-optic telecommunications cables were cut—in a way that made them hard to repair—in an underground vault near the substation, not far from U.S. Highway 101 just outside south San Jose. It would have taken more than one person to lift the metal vault cover, said people who visited the site.
Nine minutes later, some customers of Level 3 Communications, an Internet service provider, lost service. Cables in its vault near the Metcalf substation were also cut.
At 1:31 a.m., a surveillance camera pointed along a chain-link fence around the substation recorded a streak of light that investigators from the Santa Clara County Sheriff’s office think was a signal from a waved flashlight. It was followed by the muzzle flash of rifles and sparks from bullets hitting the fence.
The substation’s cameras weren’t aimed outside its perimeter, where the attackers were. They shooters appear to have aimed at the transformers’ oil-filled cooling systems. These began to bleed oil, but didn’t explode, as the transformers probably would have done if hit in other areas.
About six minutes after the shooting started, PG&E confirms, it got an alarm from motion sensors at the substation, possibly from bullets grazing the fence, which is shown on video.
Four minutes later, at 1:41 a.m., the sheriff’s department received a 911 call about gunfire, sent by an engineer at a nearby power plant that still had phone service.
Riddled with bullet holes, the transformers leaked 52,000 gallons of oil, then overheated. The first bank of them crashed at 1:45 a.m., at which time PG&E’s control center about 90 miles north received an equipment-failure alarm.
Five minutes later, another apparent flashlight signal, caught on film, marked the end of the attack. More than 100 shell casings of the sort ejected by AK-47s were later found at the site.