The Glamorgan-Gwent Archaeological
Historic Environment Record
following information has been provided under the terms and conditions
of access as detailed on GGAT’s website www.ggat.org.uk.
Copyright is reserved on all data supplied by the GGAT HER Charitable Trust.
All output resulting from the use of the data must acknowledge the source
from information held by the GGAT HER Charitable Trust copyright.
data below is intended to be used for information and research only and
is not for use as part of a commercial project. If you wish to use
information derived from material held by the GGAT HER Charitable Trust
for publication in printed or multimedia form or to compile resources for
commercial use, prior permission must be obtained in writing. For further
information or to arrange a visit to the Trust please send an
The following information is from the
on-line database Archwilio
BLAEN CWM BACHPrimary Reference Number (PRN) : 00615w
Trust : Glamorgan Gwent
Community : Tonna
NGR : SS79349882
Site Type (preferred type first) : Iron Age Enclosure
Legal Protection : scheduled ancient monument
Blaen-cwm Bach is a small earthwork standing on the edge of a natural scarp, which provides a natural defence to the north. It consists of a curved bank with a ditch on the SE, about 9m wide and 1.5m high overall, forming the south-east part of a circle.
Blaen-cwm Bach is A small, incomplete univallate enclosure, in a ledge position, measuring about 100m east-north-east to west-south-west, by 50m transversely. It stands on the edge of a natural scarp, which provides a natural defence to the north. It is on the east of Tonna, immediately to the north- west of the roman camp, about 250m above OD. It consists of a curving bank with an outer ditch both of which have been destroyed to the west and terminates at steep natural slopes in the north. The curved bank, which shows a stone content, and the ditch are on the SE, and are of about 9m wide and 1.5m high overall, forming the south-east part of a circle. The bank is 4.0m wide and has an average height of 0.5m. The ditch is 5m wide and 1.3m deep in the north. There is a gap in the circle of about 7.5m with a corresponding causeway across the ditch, about 30m from the north end. The structure is probably an unfinished ringwork, if completed, it would have enclosed about 0.1ha. The earthwork is grass covered and there is no visible trace of internal habitations (RCAHMW 1976 ; D EDWARDS, OS, 1956 ; AM7 ; OS1982).
A small earthwork stands near the NW corner in the Roman marching camp on the ridge E of Tonna (No. 739) at about 250m above OD A bank with a ditch on the SE, about 9m wide and 1.5m high overall, forms in plan the SE quadrant of a circle of about 50m radius, with centre and N end on the edge of a steep natural scarp. There is a gap about 7.5m wide, with a corresponding causeway across the ditch, about 30m from the N end. The bank is of earth with much rubble, but no revetment is visible. There is no indication that the rampart ever extended further; the structure is probably an unfinished ringwork. If completed, it would have enclosed about 0.1ha. (Wiggins and Evans 2005)
Wiggins, H and Evans, E , 2005 , Prehistoric defended enclosures in Glamorgan with recommendations for fieldwork
01/Desc Text/Cadw/ Full Management Report/2005/Copy in further information file
RCAHMW, 1976, An Inventory of The Ancient Monuments In Glamorgan, I, ii, p25 (num.627), fig. 24.
Helen BURNHAM, CADW, 1986,Scheduled Welsh Historic Monuments, visit text (sam GM277, last visited in 2006).
D. EDWARDS, CADW, 1956,Scheduled Welsh Historic Monuments, visit text.
AM7, Visit Text
OS, Visit Text,1982
E000449 : BLAEN CWM BACH, PARTIAL EXCAVATION, 1975 (year : 1975)
E001455 : Prehistoric defended enclosures in Glamorgan (year : 2005)
E002947 : Baglan Bay gas pipeline. DBA (year : 1999)
Related PRNs : 307217
October 27, 2016, 10:43 am
- HTML file produced from GGAT HER Charitable Trust Ltd. Heathfield House,
Heathfield, Swansea SA1 Tel. 01792 655208; Fax 01792 474469 website: www.ggat.org.uk
email: firstname.lastname@example.org Registered Charity no. 505609
supplied by in partnership with Local Authorities, Cadw and the partners
of ENDEX © GGAT HER Charitable Trust, 2016 (and in part © Crown,