408 
BATHYMETRICAL SURVEY OF 
Loch Mhor (see Plate CIV.). — ^^Locli Mhor is the reservoir for the 
British Aluminium Co.’s works at Foyers. In its construction advantage 
was taken of two natural lochs (Garth and Farraline). By means of 
the dam at the lower end of Loch Garth, the surface of Loch Mhor may 
be raised to 20 feet above the original level of Loch Farraline, the upper 
loch. In summer the two lochs may subside to their original levels. 
The loch is still divided into two portions by a causeway 2 miles from 
the upper end, and a public road here crosses by a bridge, the water 
passing by a canal underneath. The loch is rapidly forming a beach by 
eating away the boulder clay of the fields. These raw cliffs of clay 
FIG. 65. LOCH MHOR, SOUTH-WEST END, SHOWING THE SHORE WHEN THE WATER 
IS LOW, WITH REMAINS OF DEAD TREES. 
(Photograi^h hy Mr. G. West. From “ Proc. Roy. Soc. Edin.” by ijermission of the Council.) 
are exposed when the loch is below its high level, and portions are 
continually falling in. 
Loch Mhor is of very irregular form, narrow and elongate, running 
north-east and south-west in Strath Errick, the lower end some 2 miles 
south-east of Foyers. On the west the country is moorland, with low 
hills, and many patches of trees on the shore of the loch. On the east 
the hills are higher, rising to mountains at the distance of a few miles. 
The west shore-line is of a simple outline, with slight double sigmoid 
curvature. The east shore is much broken up, several bays and arms 
running south-eastward. The largest of these is in the middle of the 
loch, and runs three-quarters of a mile inland. 
