[1] The railway enters the southern tip of the lakeshore through a narrow gorge that leads to the headwaters of the Northeast Toulnustouc River.

[2] The lake is divided between the cantons of Hesry (NW), Fagundez (SW), Le Courtois (SE) and Leventoux (NE).

The Commission de toponymie du Québec has speculated that the Petit lac Manicouagan was named because of its spoon shape.

[5] The Uapishka Biodiversity Reserve protects the Monts Groulx massif to the south of the lake and the Hart Jaune River.

[10] The Betsiamites (Pessamit) heritage site includes 652 square kilometres (252 sq mi) around the Hart Jaune River and the Petit lac Manicouagan.

[11] The Hart-Jaune dam and power plant have their origin on 26 January 1957 when the Québec Cartier Mining Company was created by U.S. Steel to supply iron ore concentrate.

[4] In September 1998, following an environmental impact review, Hydro Quebec was given permission to undertake a back-filling project over a distance of 2,385 metres (7,825 ft) in Petit lac Manicouagan and the Hart Jaune river to rehabilitate the riprap protection of part of the upstream facing of the retaining structures for the Hart-Jaune complex.