Ben Lawers lies on the watershed between the rivers Tay and Lyon. Since the 1950s, water has been captured from the numerous burns on the south face of Ben Lawers and Meall nan Tarmachan as part of the Breadalbane Hydro-Electric Scheme. The water is diverted to the Lochan na Lairige, from where it is piped to drive hydro-electric turbines at Finlarig on the banks of Loch Tay. The level of the Lochan na Lairige was raised by the construction of the 344 metre-long Lawers Dam, a buttress-type dam that is 42 m high. Due to the height of this reservoir the static head of water is 415 m, the highest available on any hydro-electric scheme in Scotland.