1. This site is shown as an unnamed level on the 1881 1:2500 Ordnance Survey. It was in fact opened in 1865 by the Llynfi, Tondu & Ogmore Coal & Iron Company. It worked for about 40 years, but closed in 1906 by the final owner North Navigation Company. It worked the Rhondda No.2 and No.3 seams and at its peak in 1896 employed 204 men, 159 of whom worked underground. In 1881 the colliery is shown as being linked by a tramway to a series of coke ovens on the valley floor to the east. Trysor 2011.

2. Tynewydd colliery is denoted on the 2nd edition Glamorgan Ordnance Survey County Series mapping of 1899 (sheet XXVI 12), by which time it is an established colliery with engine house and tramway to Ogmore Vale. On later mapping further quarries have been dug to the north and south, and by 1940 the colliery appears to be disused.

Photographed during aerial reconnaissance by RCAHMW on 16th October 2008.
L. Osborne, 16th November 2012.