 The confluence of Los Trancos Creek with San Francisquito Creek occurs just below Piers Lane Road (between Interstate 280 and the Stanford Golf Course) in a small residential island of land belonging to Menlo Park within Stanford's lands.In 1929 Stanford installed a diversion dam on Los Trancos Creek to its Felt Lake water storage reservoir.The dam, located just below the intersection of Arastradero and Alpine Roads, blocked access of anadromous steelhead trout ("Oncorhynchus mykiss") to over of pristine upstream spawning grounds.