The political battle to keep the Los Angeles River officially a river after is heating up. Earlier this month, the U.S. Army Corps issued a finding stating that only two small portions of the Los Angeles River constitute as "traditional navigable waters" under the Clean Water Act.

If the decision is allowed to stand, "it would greatly undermine federal protections both for the LA River and the ephemeral streams and tributaries that feed into it," according to Damian Carroll at Assembly Mike Feuer's office. "This issue is of particular importance in light of the City's work in developing the Los Angeles River Revitalization Master Plan."

It is currently illegal to boat in the LA River for safety reasons, but "the fact that it has been accomplished provides credible evidence to overturn the Army Corps' finding," Feuer wrote in a letter to Stephen L. Johnson of the EPA. Feuer also noted in his objection to the Army Corps' finding that the city and other agencies have spent "countless hours" creating the Los Angeles River Revitalization Master Plan that includes permitted boating and river recreation.