sentences:  A short section of the River Spean connects the natural loch with the reservoir downstream and this river continues westwards below Laggan Dam.Two other substantial watercourses empty into the loch, the Allt Labhrach which drains Lochan an h-Earba which lies southeast of Loch Laggan and Allt Coire Ardair which rises beneath Creag Meagaidh.The remains of an island dwelling lie in the middle of the loch near Ardverikie.