This oak and others could buried any day now - unless you act to support it! Photo by permission of EcoToneStudios - All rights reserved

The story has been covered well by Josh Link at L.A. Creek Freak, Barbara Eisenstein at Weeding Wild Suburbia, and elsewhere, but I want to weigh in briefly on the threatened native oak woodlands site in Arcadia, which Los Angeles County Public Works department plans to bury with sediment.

The San Gabriel Mountains gradually wear down, through rain fall. Mountain streams carry sediment down steep hills and deposit sediment on flatter alluvial plains. This is a natural process;  it’s what created the alluvial places where nearly all Southern California residents live.

At a site along Highland Oaks Drive in the city of Arcadia, sediment from the Santa Anita Wash (an eastern tributary of the Rio Hondo and the Los Angeles River) has built up and now the county wants to deposit that wash sediment on top of an adjacent grove of oak trees. Sadly, the county sees this sediment – rich, wonderful soil – as a problem to get rid of – not as a resource. (more…)

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