Why LA’s concrete river matters more than ever
The Los Angeles River is a crucial piece of infrastructure that has evolved from a natural ecosystem to a concrete flood-control system. While it effectively prevents flooding, the concrete encasement has led to challenges in water management and local ecology. Efforts to restore the river aim to balance habitat preservation, public access, and stormwater capture without compromising flood protection.
- ▪The Los Angeles River spans 51 miles and serves as both an ecosystem and a flood-control mechanism.
- ▪About 80% of the river was encased in concrete after the catastrophic flood of 1938 to prevent future disasters.
- ▪Restoration efforts are complicated by the need to balance habitat, public access, and stormwater management.
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Metro Why LA’s concrete river matters more than ever By Brad Coleman Published May 20, 2026 Updated May 20, 2026, 3:00 p.m. ET See more of our coverage in your search results. Add The California Post on Google You’ve seen it in car chases, drag races and apocalyptic movie scenes, but the Los Angeles River isn’t a movie set. It’s one of the city’s most important pieces of infrastructure — and one of its biggest environmental questions. The 51-mile river cuts across Los Angeles in a form that feels uniquely LA: half urban, half natural, part ecosystem, part flood-control machine. Before the concrete, before the city, this river sustained life for thousands of years. Contrary to popular belief, LA isn’t a desert — it was once a lush basin dotted with wetlands.
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