PASADENA >> Bulldozers will begin scooping sediment from behind Devil’s Gate Dam starting Friday as part of a temporary dig in the Hahamongna Watershed Park wilderness area, the county announced this week.
An interim project will remove 4,000 cubic yards of dead trees, muck and debris washed down from higher elevations from last winter’s storms, enough to reduce the potential of dangerous debris flows during the coming winter, according to the county.
“Dead tree branches and other vegetative matter will also be removed from the work area immediately in front of the dam,” the county’s Department of Public Works announced in a statement Wednesday.
The work is expected to take four weeks to complete, the county reported. Some material will be stored in the Upper Arroyo Seco at Johnson Field, after the county received permission from the city of Pasadena. The green waste will be hauled to Scholl Canyon Landfill near Glendale in dump trucks at a rate of about 10 per day for four weeks.
Public Works stressed that this is only a temporary measure and is not part of the larger sediment removal project approved by the county Board of Supervisors in 2014 that has been tied up in court over environmental concerns. The county wants to remove 2.4 million cubic yards of sediment, dirt and plants that would take five years using 425 trucks a day.
That project was dealt a blow in February when Superior Court Judge James Chalfant agreed in part with the Arroyo Seco Foundation and the Pasadena Audubon Society that the final environmental impact report was deficient in three areas.
The county has reworked portions of the…
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