408 



BATHYMETRICAL SURVEY OF 



Loch Mhor (see Plate CIV.). Loch 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. 



(Photograph by Mr. G. West. From " Proc. Roy. Soc. Edin.," by permission 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. 





