 High winter flows in Los Trancos Creek are diverted by Stanford's Lagunitas Diversion Dam just downstream from Rossotti's to Felt Lake.The lake is actually a reservoir that lies west of Interstate 280 and bounded by Alpine Road and the Pearson Arastradero Preserve on Arastradero Road.Felt Lake was constructed in 1876 by gold miner and lumber dealer Job Johnston Felt, who bought 700 acres in northern Santa Clara County to farm.