UPDATE 04/18 5:20 p.m.
43-year-old Ryan Herbert was arrested on Friday after allegedly making threats, according to Pima County Sheriff's Department. He lost his son, Dominick Herbert, in the industrial accident Thursday morning.
“Unfortunately, in dealing with the tragic news, Mr. Herbert made some serious threats that required a law enforcement intervention. We understand the grieving process and the toll of such a loss on a family," said PCSD.
UPDATE 10:50 p.m.
According to the Pima County Sheriff’s Department, the workers’ injuries were caused by a downed power line.
One worker, 20-year-old Dominic Herbert, was pronounced dead at the scene.
A second worker sustained life-threatening injuries and was taken to a hospital, where he remains in critical condition.
Preliminary findings from the investigation indicate the workers were installing a new water main along West Pecos Way, near an energized Tucson Electric Power line. The power line broke and fell into a trench where the workers were located. The cause of the break is still under investigation.
Multiple agencies are participating in the ongoing investigation, including the Pima County Department of Transportation, the Arizona Division of Occupational Safety and Health and Tucson Electric Power.
UPDATE 12:45 p.m.
One worker was killed Thursday morning, and another was seriously injured and hospitalized during what authorities are calling an "industrial accident," according to Pima County Sheriff's Department.
The road is estimated to remain closed for the next 4-5 hours. Power was out for about 1500 customers for approximately 30 minutes.
Investigating agencies include OSHA and Golder Ranch in addition to PCSD. Authorities have not yet released the identities or employers of the workers involved in the incident.
KGUN 9's Kenny Darr is on scene and will have a full report later today.
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ORIGINAL STORY:
A downed power line has closed West Pecos Way on Tucson's northwest side, from North Thornydale Road to West Lambert Lane.
According to a social media post from Pima County Sheriff's Department, an initial report says there are two people injured.
The cause of the downed power line is still being determined, the post said.
People are being asked to avoid the area.
Just before 8:30 a.m., Golder Ranch Fire District responded to a trench rescue off Pecos Way between Thornydale Road and Lambert Lane. There is a power line down and possible injuries to two people.
— Golder Ranch Fire (@GRFDAZ) April 17, 2025
Our personnel is currently working alongside @NorthwestFire, @TucsonFireDept,… pic.twitter.com/RdVzQon9Mf
