The Sagavanirktok River is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in Alaska

Alaska

Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...

's North Slope. It is approximately 180 miles long, and originates on the north slope of the Brooks Range

Brooks Range

The Brooks Range is a mountain range in far northern North America. It stretches from west to east across northern Alaska and into Canada's Yukon Territory, a total distance of about 1100 km . The mountains top out at over 2,700 m . The range is believed to be approximately 126 million years old...

, flowing north to the Beaufort Sea

Beaufort Sea

The Beaufort Sea is a marginal sea of the Arctic Ocean, located north of the Northwest Territories, the Yukon, and Alaska, west of Canada's Arctic islands. The sea is named after hydrographer Sir Francis Beaufort...

 near Prudhoe Bay. The Trans-Alaska Pipeline System

Trans-Alaska Pipeline System

The Trans Alaska Pipeline System , includes the Trans Alaska Pipeline, 11 pump stations, several hundred miles of feeder pipelines, and the Valdez Marine Terminal. TAPS is one of the world's largest pipeline systems...

 and Dalton Highway

Dalton Highway

The James W. Dalton Highway, usually Dalton Highway is a 414-mile road in Alaska. It begins at the Elliott Highway, north of Fairbanks, and ends at Deadhorse near the Arctic Ocean and the Prudhoe Bay oil fields...

 roughly parallel it from Atigun Pass

Atigun Pass

Atigun Pass, elevation , is a high mountain pass across the Brooks Range in Alaska, located at the head of the Dietrich River.. It is where the Dalton Highway crosses the Continental Divide , and is the highest pass in Alaska that is maintained throughout the year. Atigun is the only pass in the...

 to Deadhorse, Alaska

Deadhorse, Alaska

Deadhorse is an unincorporated community in North Slope Borough, Alaska, United States, along the North Slope near the Arctic Ocean. The town consists mainly of facilities for the workers and companies that operate at the nearby Prudhoe Bay oil fields. Deadhorse is accessible via the Dalton Highway...

. Also, a glaciation happened approximately at the same time as the Illinoian Stage

Illinoian Stage

The Illinoian Stage is the name used by Quaternary geologists in North America to designate the period of geologic time of ~300,000—130,000 years ago, a period of ~ during the middle Pleistocene when sediments comprising the Illinoian Glacial Lobe were deposited. It precedes the Sangamonian stage...

of central North America at the Sagavanirktok River.