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Lake Elwell
Location of Lake Elwell in Montana, USA.
Location of Lake Elwell in Montana, USA.
Lake Elwell
Location in Montana
Location of Lake Elwell in Montana, USA.
Location of Lake Elwell in Montana, USA.
Lake Elwell
Location in the United States
Location Liberty / Toole counties, Montana, United States
Coordinates 48°19′20″N 111°05′48″W / 48.32222°N 111.09667°W / 48.32222; -111.09667
Type reservoir
Primary inflows Marias River
Primary outflows Marias River
Basin countries United States
Surface area 14,842 acres (60.06 km2)
Surface elevation 3,025 ft (922 m)

Lake Elwell, also known as Tiber Reservoir, is a large, man-made lake in north central Montana, United States. It was created by building a dam across the Marias River. This dam, called the Tiber Dam, holds back the river's water to form the reservoir.

About Lake Elwell

Lake Elwell is an important body of water in Montana. It helps store water for different uses, like farming and providing water for towns. Because it's a reservoir, its water level can change depending on how much rain or snow melts into the Marias River.

How Lake Elwell Was Made

Lake Elwell was formed when the Tiber Dam was built on the Marias River. A dam is a huge wall constructed across a river to stop the flow of water. This creates a large lake behind the dam, which is called a reservoir. The Tiber Dam helps control the river's water and store it for when it's needed.

Where is Lake Elwell?

You can find Lake Elwell in the northern part of Montana. It stretches across two counties: Liberty County and Toole County. The lake is located in a beautiful area of the state, surrounded by the natural landscape of Montana.

Who Was Charles B. Elwell?

Lake Elwell was named after a person named Charles B. Elwell. He was a judge who lived from 1888 to 1974. Judge Elwell was a very important person in Montana because he was a former director of the Montana Reclamation Association. This group worked on projects to manage water resources, like building dams and reservoirs, to help the land and people in Montana. Naming the lake after him was a way to honor his contributions.

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