58 
BATHYMETRICAL SURVEY OB^ 
LOCHS OF THE TOKRIDON BASIN. 
Only two lochs within the Torridon basin were sounded by the Lake 
Survey, viz. Loch Damh, which drains into Upper Loch Torridon, and 
Loch Dhugaill, which drains into Loch Shieldaig, a branch of Loch 
Torridon. Loch Lundie, which also drains into Loch Shieldaig, and 
other smaller lochs, could not be surveyed for lack of facilities. The 
district abounds in deer forests and lofty mountains, and the scenery is 
of a true Highland character. Loch Damh contains salmon, sea-trout, and 
sahno ferox, as well as trout, while Loch Dhugaill contains salmon, sea- 
trout, and yellow trout; but the fishings are preserved. 
Loch Dhugaill (see Plate XX.). — Loch Dhugaill (or Dougall) lies at 
the foot of Glen Shieldaig (see Fig. 31), about a mile from the head of 
Loch Shieldaig, the precipitous slopes of Ben Shieldaig rising on the east. 
The loch trends in a north-west and south-east direction, and is narrowly 
triangular in outline, with the apex to the north-west. The length exceeds 
half a mile, and the maximum breadth at the south-east end is about a 
quarter of a mile. The superficial area is about 38 acres, and the drainage 
area over 4 square miles. The maximum depth of 108 feet was observed 
in the middle of the loch towards the south-east end. The volume of 
water is estimated at 63 million cubic feet, and the mean depth at 38^ feet. 
The loch was surveyed on August 22, 1902, but the elevation could not 
be determined ; on July 1, 1869, the Ordnance Survey officers found the 
elevation to be 84*3 feet above the sea. The conformation of the basin is 
simple, the deeper water lying at the wide upper end of the loch. About 
74 per cent, of the lake-floor is covered by less than 50 feet of water, while 
about 7 per cent, is covered by more than 100 feet of water. Temperatures 
taken in the deepest part of the loch gave 57°*0 Fahr. at the surface and 
45°*7 at 100 feet, showing a range of 11°'3. 
Loch Damh (see Plate XX.). — Loch Damh lies about a mile from the 
southern shore of Upper Loch Torridon, into which it drains by the river 
Balgay, Beinn Damph (2958 feet) rising from the eastern shore of the 
loch (see Fig. 32). The two little lochs, an Loin and Coultrie, at the 
head of Loch Damh, were not surveyed, but were seen to be largely filled 
with weeds, and are apparently shallow. Loch Damh trends nearly north 
and south, and is somewhat V-shaped in outline, with the limbs of the V 
