Seasonal maintenance of the existing road continued but no further work was done. In 1964, the road was renamed the Dempster Highway, after petitions by Vancouver Yukoners Association and the Yukon Order of Pioneers. Construction resumed in 1970 as the Canadian government sought to assert sovereignty over their Arctic territories after the American discovery of oil and gas deposits at Prudhoe Bay, Alaska in 1968. Work was further motivated by speculation that an oil pipeline might be built in the Mackenzie Valley.