(Wines&Vines) - Vineyard owner and manager Davie Piña admitted that persuading vineyard owners to sacrifice vines for the sake of juvenile salmon and river sediment it wasn’t an easy sell. “That was probably the hardest part,” said Piña, owner of Piña Vineyard Management LLC and leader of the Rutherford Dust Association’s committee on river restoration. Most Napa Valley growers, he said, either have left the flood-prone river to government management or tried to control erosion by dumping rubble along its banks.