Explore the history of LA River, from its natural state to concrete confinement, and efforts for restoration. Learn about grassroots activism, wildlife, and challenges balancing environmental concerns with urban development. Discover the missed opportunities for green spaces and river protection in Los Angeles.
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Quick takeaways
The LA River's concrete channelization contrasts with natural rivers, impacting biodiversity.
Efforts to restore the LA River's natural habitat and clean water protections are ongoing.
Deep dives
The Prevalence of Concrete in Los Angeles River
The Los Angeles River, previously a free-flowing body of water, now exists as a concrete trapezoidal channel due to urbanization. Most of the year, it consists of a tiny stream at the bottom, resembling a giant storm drain. The river's engineered form contrasts sharply with natural rivers in other major cities, impacting the overall landscape and biodiversity in Los Angeles.
Historical Changes in the LA River
Historically, the LA River behaved erratically, flooding and changing its course with heavy rains. Native indigenous communities built their lives around the river's patterns of flooding and drought. The arrival of European settlers altered the river's dynamics, leading to water depletion and eventually its concrete channelization.
Consequences of 1938 Flood and Channelization
The catastrophic 1938 flood and subsequent Army Corps of Engineers flood control measures resulted in channelizing the LA River with concrete, transforming it into a flood control channel. This endeavor aimed to prevent devastating floods but also buried the river's natural attributes and hindered environmental replenishment.
Advocacy for LA River Revitalization
Efforts led by organizations and activists like Friends of the Los Angeles River have sought to restore the LA River's natural habitat and clean water protections. By reinterpreting the river as navigable, clean water safeguards remain in place, although recent Supreme Court decisions pose threats to these protections, emphasizing the ongoing need for environmental advocacy and awareness.
When you hear the word "river," you probably picture a majestic body of water flowing through a natural habitat. Well, the LA River looks nothing like that. Most people who see it probably mistake it for a giant storm drain. It's a deep trapezoidal channel with steep concrete walls, and a flat concrete bottom. Los Angeles was founded around this river. But decades ago it was confined in concrete so that, for better or worse, the city could become the sprawling metropolis that it is today. All these years later the county is still grappling with the consequences of those actions.
Reported by Gillian Jacobs, guest hosted by 99PI producer, Vivian Le.