Flowing 330 miles from the Sierras to the delta, the San Joaquin River is California’s second longest river. It once boasted one of the state's great salmon runs. But since the construction of Friant Dam near Fresno in the 1940s, most of the San Joaquin's water has been siphoned off to farmland in the Central Valley. Now, after years of lawsuits, a new effort to restore the river is offering hope that fish and farmers can co-exist.