The Army Corps of Engineers has chosen a plan to revitalize the Los Angeles River. The $453-million plan is the second cheapest of four options shortlisted in a feasibility study released Friday. The plan, known as Alternative 13, would revitalize an 11-mile stretch of the river between Griffith Park and Downtown by removing concrete from the bottom of the river and widening it to create a freshwater marsh by Glassell Park.

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The federal government will foot more than a quarter of the price tag, according to the Los Angeles Times. The city of Los Angeles will cover the rest. Environmental and advocacy groups don't think the plan chosen by the Corps goes far enough and are planning to push regulators to adopt and more comprehensive, albeit it more expensive, proposal.

The Corps will make its final recommendation after a 45-day public comment period. The project would need Congress' authorization before it could start, which could take years.

Guests:

Josephine Axt, Chief of Planning, Army Corps of Engineers, Los Angeles District

Omar Brownson, Executive Director, LA River Revitalization Corporation, a nonprofit created by the city of Los Angeles