Answer:
1960's
Step-by-step explanation:
it because in 1911 new oils were produced, in 1960, companies came to buy the newly produced oil for work in the cook let and production in oil, in 1968,the system became a joint venture between the British petroleum Atlantic Rich field and humble it was completed 1977 and it is an 800 mile pipeline that transport oil through pipelines Proudhon Bay south to Hickel Highway, across the Yukon and Livengood and Fairbanks