[5] The River Laune flows approximately 20 km to drain Killarney’s Lough Leane into the sea at Castlemaine Harbour.

Many streams on the south side of the Reeks drain into Killarney’s Upper Lake before filtering down to Lough Leane.

If the bogs of Ireland could be drained then they could be used to grow this raw material without affecting the existing agricultural output of the country.

In 1811–1812 Alexander Nimmo surveyed and mapped over 76,000 acres (30,700 ha) of land on the Iveragh Peninsula for the Bogs Commission.

Various major repairs are evident where large rocks and concrete have replaced the stone and earth, although much of the original banks are still intact.

The current bridge is built from local limestone, moved by horse and cart from Steelroe Quarries approximately 1 km away on the Tralee Road.