Earth bank between and along the Afon Leri and Afon Clettwr and which continue as far as the Ynys Hir Nature Reserve. Spurs of the sea defences turn inland along the line of streams and rivers flowing into the estuary, and links to the banks alongside the canalised river Leri.
Events and Historical Information:
The General Enclosure Act of 1801 provided the stimulus for local landowners, principally Pryse Pryse of Gogerddan, Lord of the Manor of Genau'r Glyn, and his close neightbour Mathew Davies of Cwmcynfelin, to promote the enclosure and drainage of the bog. An enclosure act was given royal assent on 22 June 1813. The enclosure commission's surveyor, Charles Hassall, suggested that the reclamation scheme should divert various streams and that the river Dyfi should be embanked. He recommended Anthony Bower of Lincoln as the engineer. In 1815, Bower proposed that the river Leri be deepened, straightened and embanked from a opening into the sea at Pont Leri. A sluice was to be constructed at the river mouth from which the main drain would run through the centre of the bog. This would be accommpanied by a catchwater drain which follow the course of the Leri to the foot of the hull and then along the south eastern boundary of the bog to join the river Cletwr. Another plan was submited by Griffith Parry of Penmorfa which was to widen and deepen the ancient ditches around the bog, embank the Dyfi and divert the river Leri into a straight line to Pont Leri. Disagreements about the various aspects of the plans continued amongst the commissioners and land owners as waste land was sold to pay for the improvement works. It appears that embankment of the Dyfi had been completed by end of 1818, as the contractor's solicitors began pressing the commisssioners for payment of the outstanding balance of £2500 in January 1819.
Sources include:
Colyer, R J, The enclosure and drainage of Cors Fochno (Borth Bog) 1813-47 in Ceredigion, Vol. 8, no. 2 (1977), p. 181-192
