Knewstubb Lake is an arm or stretch of the Ootsa Lake Reservoir in the Nechako Country

Nechako Country

The Nechako Country, also referred to as the Nechako District or simply "the Nechako" is one of the historical geographic regions of the Canadian province of British Columbia, located southwest of the city of Prince George and south of Hwy 16 on the inland side of the Hazelton Mountains The...

 of the western Central Interior of British Columbia

British Columbia Interior

The British Columbia Interior or BC Interior or Interior of British Columbia, usually referred to only as the Interior, is one of the three main regions of the Canadian province of British Columbia, the other two being the Lower Mainland, which comprises the overlapping areas of Greater Vancouver...

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

. It forms part of the south arm of the reservoir, which includes adjoining stretches such as Eutsuk Lake and Natalkuz Lake, which are "upstream" to the southwest. Ootsa Lake was formed by the damming and diversion of the flow of the Nechako River

Nechako River

The Nechako River arises on the Nechako Plateau east of the Kitimat Ranges of the Coast Mountains of British Columbia and flows north toward Fort Fraser, then east to Prince George where it enters the Fraser River...

, the bulk of which is now drained beneath the spine of the Coast Mountains

Coast Mountains

The Coast Mountains are a major mountain range, in the Pacific Coast Ranges, of western North America, extending from southwestern Yukon through the Alaska Panhandle and virtually all of the Coast of British Columbia. They are so-named because of their proximity to the sea coast, and are often...

 to the west to the Kemano Powerhouse, which is the power supply for the aluminum smelter at Kitimat

Kitimat, British Columbia

Kitimat is a coastal city in northwestern British Columbia, in the Regional District of Kitimat-Stikine. The Kitimat Valley, which includes the adjacent community of Terrace, is the most populous urban district in Northwest British Columbia...

, to the southeast of Terrace

Terrace, British Columbia

Terrace is a city on the Skeena River in British Columbia, Canada. The Kitselas people, a tribe of the Tsimshian Nation, have lived in the Terrace area for thousands of years. The community population fell between 2001 and 2006 from 12,109 with a regional population of 19,980 to 11,320 and...

.

Knewstubb Lake is named for F.W. Knewstubb of the British Columbia government's Water Rights Branch, who led exploration parties for power development in various regions of the Coast Mountains in the 1920s. Mount Knewstubb  to the south of Franklyn Arm of Chilko Lake

Chilko Lake

Chilko Lake is a 180 km² lake in west-central British Columbia, at the head of the Chilko River on the Chilcotin Plateau. The lake is about 65 km long, with a southwest arm 10 km long. It is one of the largest lakes by volume in the province because of its great depth, and the...

is also named for F.W. Knewstubb.