After more than six decades of painstaking efforts, Salinas Valley farmers are on the verge of ending the advance of seawater intrusion into the groundwater they use to irrigate nearly $4 billion worth of crops. Construction in the 1960s of reservoirs at Lake Nacimiento and Lake San Antonio in the hills at the south end of Monterey County produced a supply of water to recharge the underground aquifer in the height of the pumping season.

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