According to Christopher Stone, Assistant Deputy Director of the county Dept. of Public Works, the county wants to remove 25,000 cubic yards of sediment from the south end of the watershed before the next storm season.
Pictured: from the presentation, the side of Devils Gate Dam,
before and after sediment washed down from the 2009 Station Fire.
Stone gave a presentation to the Altadena Town Council at its Tuesday night meeting about the interim plan for Hahamongna Watershed sediment cleanup. The county board of supervisors recently halted a fast-track plan to remove sediment from the Hahamongna Watershed after objections from the public about the removal of trees and habitat such a cleanup would entail, as well as the thousands of truck trips it would take to move the vast amount of sediment that has built up over the decades and after the Station Fire.
But while the county supervisors’s request for an environmental impact report has halted immediate action, some interim form of mitigation needs to be done to clear up the area, which was filled with additional thousands of square yards of sediment following the fire and significant rainfall. The watershed is a key line of defense against potential flooding in Pasadena, South Pasadena, and other communities downstream along the Arroyo Seco.
Even though the county has stalled the startup of sediment removal from Hahamongna Watershed Park, the department of public works is going ahead on an interim plan to clear the area of the park nearest Devil’s Gate Dam.
Pictured: from the presentation, the side of Devils Gate Dam,
before and after sediment washed down from the 2009 Station Fire.
Stone gave a presentation to the Altadena Town Council at its Tuesday night meeting about the interim plan for Hahamongna Watershed sediment cleanup. The county board of supervisors recently halted a fast-track plan to remove sediment from the Hahamongna Watershed after objections from the public about the removal of trees and habitat such a cleanup would entail, as well as the thousands of truck trips it would take to move the vast amount of sediment that has built up over the decades and after the Station Fire.
But while the county supervisors’s request for an environmental impact report has halted immediate action, some interim form of mitigation needs to be done to clear up the area, which was filled with additional thousands of square yards of sediment following the fire and significant rainfall. The watershed is a key line of defense against potential flooding in Pasadena, South Pasadena, and other communities downstream along the Arroyo Seco.