Whakakihia te rerenga e whai ake nei: Ko te Piriti Raina o Dumbarton (i mohiotia ko te Piriti Dumbarton Point, ko te Piriti Dumbarton ranei, ko tetahi o nga hanganga nui o te raina tereina o Dumbarton Cut-off) i wikitoria e E. H. Harriman. I mua i te otinga o te Dumbarton Cut-off, ka tukuna nga taonga tereina whakawhiti ki Oakland ka tukuna ki San Francisco. I tiimata nga mahi tuatahi i te tau 1904 me te whakawakanga o te whenua i Dumbarton Point, me te whakaurunga o te Kamupene Railway Central California, i hangaia e etahi o nga rangatira o te Moananui a Kiwa mo te kaupapa kotahi o te hanga raina tereina mai i Newark ki San Mateo. I reira ko te tahi mau te ātete ki te piriti i rōpū pakihi rohe, me te United States Army Corps o Engineers puritia he whakarongo tūmatanui i roto i August 1906 fakaafe'i urupare tūmatanui i runga i te mahere mo te piriti. I tohe a Henry Rengstorff ka aukati te piriti i te waka wai, e hiahiatia ana hei huarahi rereke i te wa o te patu tereina, te parekura taiao ranei, penei i te
te ru tata nei.