Lac Bouchette is located in the township of Dablon, covering a large area from range V to range VII. The lake is long in the north–south direction and a maximum width of . Lac Bouchette receives by its southern point the waters of the
rivière des Commissaires which flows for towards the northeast at the limit of ranges V1 and V11, from
lac des Commissaires. The plans of the Mapping Service of the Ministry of Energy and Resources, of the
Government of Quebec, indicate this segment of river as the
Ouiatchouane River. This river receives on its right the waters of the trout river. With a length of (in a north–south direction), Ouiatchouane Lake is located adjacent north of Bouchette Lake, in ranges V and V1. End to end, these two lakes form a body of water long. An isthmus 0.5 km long which is crossed on the west side by a channel about 250 m long designated the "Pass", separates the lakes Bouchette and Ouiatchouane. The Hermitage road crosses this isthmus from East to West, to head towards the
Ermitage Saint-Antoine. The waters of Lake Bouchette flow from the north into Lake Ouiatchouane, via this "Pass". The
route 155, connecting
La Tuque and
Chambord (
Lac Saint-Jean), runs along the eastern part of the Bouchette lakes and Ouiatchouane. This road crosses the village of
Lac-Bouchette, which is located on the eastern shore of these two lakes. A road goes around Lac Bouchette. The main tributaries of the eastern shore of Lac Bouchette are: 7e rang stream, Bouchard-Cloutier stream and Ruisseau Thibault which feeds on Lac Castor. While the
Qui-Mène-du-Train River flows on the eastern shore of Lake Ouiatchouane. Lac Trévis is located parallel to Lac Bouchette (distance of 1.1 km for the southern part of each lake), to the west, in range 7. Lac Bouchette has wetlands on the west shore. This zone begins at Baie de la Grèle, located at the mouth of
lac des Commissaires and extends in range V11 from lot 40 to lot 23. This wetland covers part of Bouchette Island (triangular), located on Lake Bouchette, near the mouth of the
rivière des Commissaires.
Lac des Commissiaires Covering an area of and a length of , the
lac des Commissioners stretches from north to south. Its maximum width is . Its shape has two parts, roughly of similar length. The southern end of the southern part of the lake ends in a narrow bay six kilometers long, curving west. The
route 155 connecting
La Tuque and
Chambord runs along the southern part of the lake. In the middle of the lake, in the northern part, the lake forms a bulge towards the East, designated "Hail Bay" or "Mirage Lake" (former name "Lac Quaquakamaksis"). The "dam of the Commissioners" belongs to the
Government of Quebec and is found at the outlet of the
Lac des Commissaires, which constitutes the main source supplying the
Ouiatchouane River.
Ouiatchouane River The mouth of
Ouiatchouane Lake drains from the northwest to the bottom of a bay ( deep) in the
Ouiatchouane River. This river flows north to reach
Lac Saint-Jean, northwest of the intersection of
route 155 and
route 169. The
Ouiatchouane River flows mainly in the woods, except the last two kilometers of its route which are agricultural in nature. == Toponymy ==