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Chapter 3: Geologic Structure and Landforms

3.76: The Assiniboine Spillway South of Miniota

This photograph was taken from a greater height than that in figure 3.75. Hence a longer stretch—about 10 miles (16 km)—of the spillway is seen crossing the area from northwest to southeast 1. In this area the spillway is 1 to 1.25 miles (1.6 to 2.0 km) across, slightly wider where Golden Creek 2 enters from the northeast. The Assiniboine River 3 meanders freely across the spillway floor, but in one reach it hugs the south side of the valley for over two miles (3.2 km) 4. Here a dike has been built along the north bank 5 to protect the land to the north from flooding. This land is used for agriculture, and it is noticeable that three abandoned channels have dried out 6. In other places recently abandoned channels are partly water-filled 7. The valley walls are almost 250 feet (76 m) high and as in figure 3.75 the southern and western side is heavily wooded 8, whereas the south and west facing slopes have only patchy woodland 9. Two small creek valleys break the continuity of the southern side 10, while four valleys including that of Golden Creek 2 as well as Drydens Ravine 11 dissect the opposite side. The spillway is sliced across ground moraine that can be seen to the southwest and northeast. In the southwest there is a northwest/southeast lineation 12 that is missing from the northeast where the topography is very irregular with numerous intermittent lakes 13.

Most of the land on the spillway floor is used for agriculture with just a few wooded areas left 14. On either side of the spillway most land has been cleared for agriculture with some land in the process of being cleared 15. The imprint of the DLS system is obvious. Roads follow section lines except where they cross the spillway 16 and creek valleys 17. PTH 83 18 is the only major north/south route way whereas several transport lines cross the area in a general east/west direction. PTH 24 19 is very prominent and both CN 20 and CP 21 railway lines cross the area, crossing each other near the small settlement of Quadra 22. Another east/west line—light-toned on the photo—is a gas pipeline, visible because of the disturbance of the black soils during construction 23. The village of Miniota 24 is located at the junction of PTH 24 and PTH 83.

Figure 3.76: The Assiniboine Spillway South of Miniota

Figure 3.76: The Assiniboine Spillway South of Miniota

Figure 3.76

Vertical air photograph: A21748-108

Flight height: 24,700 feet a.s.l.; camera focal length: 85.611 mm

Date: July 27, 1970

Scale: 1:82,300 (approx.)

Location: Townships 12, 13, and 14; Ranges 25, 26, and 27 WI

Map sheets: 1:250,000 62K Riding Mountain

1:50,000 62K/2 Hamiota

62K/3 Miniota