Atlas of Hillforts of Britain and Ireland

WA1537 Tan-y-Llan, Denbighshire

LiDAR 1m DTM Hillshade

LiDAR 1m DTM Hillshade

Satellite Imagery

Satellite Imagery

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HER:  Clwyd Powys 118496 (None)

NMR:  SJ 05 SE (404107)

SM:  None

NGR:  SJ08315459

X:  308310  Y:  354590  (OSGB36)

Summary

Bivallate possible hillslope fort, sited on gently sloping triangular NE-facing bluff on S side of Nant Melin-dwr and above confluence of streams flowing into Afon Clywedog to N. Surrounding slopes eventually become steep on N to E, less on S to W. Inner oval enclosure measures c. 49m diameter. This enclosed by outer rectangular enclosure c. 64m across. Possibly two phases or later Roman or medieval occupation. First found by RCAHMW aerial reconnaissance 2006, as melt marks in snow. Improved pasture. No further details. Minimal investigations, undated.

Status

Citizen Science:  ✗

Reliability of Data:  Confirmed

Reliability of Interpretation:  Unconfirmed

Location

X:  -375179  Y:  6997924  (EPSG: 3857)

Longitude:  -3.370292056013172  Latitude:  53.0806185109273  (EPSG:4326)

Country:  Wales

Current County or Unitary Authority:  Denbighshire

Historic County:  Denbighshire

Current Parish/Community/Council/Townland:  Clocaenog

Monument Condition

No details.

Condition:
Extant   ✓
Cropmark   ✗
Likely Destroyed   ✗

Land Use

Improved pasture. Coed Cooper wood directly to N.

Current Use:
Woodland   ✗
Commercial Forestry Plantation   ✗
Parkland   ✗
Pasture (Grazing)   ✓
Arable   ✗
Scrub/Bracken   ✗
Bare Outcrop   ✗
Heather/Moorland   ✗
Heath   ✗
Built-up   ✗
Coastal Grassland   ✗
Other   ✗

Landscape

Hillfort Type

Bivallate possible hillslope fort, sited on gently sloping triangular NE-facing bluff on S side of Nant Melin-dwr and above confluence of streams flowing into Afon Clywedog to N. Surrounding slopes eventually become steep on N to E, less on S to W.

Type:
Contour Fort   ✗
Partial Contour Fort   ✗
Promontory Fort   ✗
Hillslope Fort   ✓
Level Terrain Fort   ✗
Marsh Fort   ✗
Multiple Enclosure Fort   ✗

Topographic Position

Position:
Hilltop   ✗
Coastal Promontory   ✗
Inland Promontory   ✗
Valley Bottom   ✗
Knoll/Hillock/Outcrop   ✗
Ridge   ✗
Cliff/Plateau-edge/Scarp   ✗
Hillslope   ✗
Lowland   ✗
Spur   ✓

Dominant Topographic Feature:  Spur bluff

Aspect:
North   ✗
Northeast   ✓
East   ✗
Southeast   ✗
South   ✗
Southwest   ✗
West   ✗
Northwest   ✗
Level   ✗

Altitude:  195.0m

Boundary

N/A


Dating Evidence

Possible Roman or medieval later occupation, but may be two phases to site, therefore uncertain. No details.

Reliability:  D - None

Principal Activity:
Pre 1200BC   ✗
1200BC - 800BC   ✗
800BC - 400BC   ✗
400BC - AD50   ✗
AD50 - AD400   ✗
AD400 - AD 800   ✗
Post AD800   ✗
Unknown   ✓

Other Activity:
Pre Hillfort:   None
Post Hillfort:   Possible Roman or medieval later occupation.

Evidence:No related records

Investigation History

First found by RCAHMW aerial reconnaissance 2006, as melt marks in snow.

Investigations:
Other (2006):   First found by RCAHMW aerial reconnaissance.

Interior Features

None

Water Source

None

Source:
None   ✓
Spring   ✗
Stream   ✗
Pool   ✗
Flush   ✗
Well   ✗
Other   ✗

Surface

None

Interior Features (Surface):
No Known Features   ✓
Round Stone Structures   ✗
Rectangular Stone Structures   ✗
Curvilinear Platforms   ✗
Other Roundhouse Evidence   ✗
Pits   ✗
Quarry Hollows   ✗
Other   ✗

Excavation

None

Interior Features (Excavation):
No Known Excavation   ✓
Pits   ✗
Postholes   ✗
Roundhouses   ✗
Rectangular Structures   ✗
Roads/Tracks   ✗
Quarry Hollows   ✗
Other   ✗
Nothing Found   ✗

Geophysics

None

Interior Features (Geophysics):
No Known Geophysics   ✓
Pits   ✗
Roundhouses   ✗
Rectangular Structures   ✗
Roads/Tracks   ✗
Quarry Hollows   ✗
Other   ✗
Nothing Found   ✗

Finds

None

Interior (Finds):
No Known Finds   ✓
Pottery   ✗
Metal   ✗
Metalworking   ✗
Human Bones   ✗
Animal Bones   ✗
Lithics   ✗
Environmental   ✗
Other   ✗

Aerial

None

Interior Features (Aerial):
APs Not Checked   ✓
None   ✗
Roundhouses   ✗
Rectangular Structures   ✗
Pits   ✗
Postholes   ✗
Roads/Tracks   ✗
Other   ✗

Entrances

None defined.

Total Number of Breaks Through Ramparts:  
0:   None

Number of Possible Original Entrances:  
2:   None

Guard Chambers:  ✗

Chevaux de Frise:  ✗

Entrances:No related records

Enclosing Works

Inner oval enclosure measures c. 49m diameter. This enclosed by outer rectangular enclosure c. 64m across. Possibly two phases or later Roman or medieval occupation.

Enclosed Area:
Area 1:   Noneha.
Total:   Noneha.

Total Footprint Area:  Noneha.

Ramparts

None

Multi-period Enclosure System:
✓   Area not defined. Possibly two phases or later Roman or medieval occupation, not defined.

Ramparts Form a Continuous Circuit:
✓   Quadrants estimated.

Number of Ramparts:  
NE Quadrant:   2
SE Quadrant:   2
SW Quadrant:   2
NW Quadrant:   2
Total:   2

Morphology

Current Morphology:
Partial Univallate   ✗
Univallate   ✗
Partial Bivallate   ✗
Bivallate   ✓
Partial Multivallate   ✗
Multivallate   ✗
Unknown   ✗

Detailed Morphology:
Partial Univallate   ✗
Univallate   ✗
Partial Bivallate   ✗
Bivallate   ✗
Partial Multivallate   ✗
Multivallate   ✗

Surface Evidence

None

Enclosing Works (Surface):
None   ✗
Earthen Bank   ✓
Stone Wall   ✗
Rubble   ✗
Wall-walk   ✗
Evidence of Timber   ✗
Vitrification   ✗
Other Burning   ✗
Palisade   ✗
Counter Scarp Bank   ✗
Berm   ✗
Unfinished   ✗
Other   ✗

Excavated Evidence

None

Enclosing Works (Excavation):
None   ✗
Earthen Bank   ✗
Stone Wall   ✗
Murus Duplex   ✗
Timber-framed   ✗
Timber-laced   ✗
Vitrification   ✗
Other Burning   ✗
Palisade   ✗
Counter Scarp Bank   ✗
Berm   ✗
Unfinished   ✗
No Known Excavation   ✓
Other   ✗

Other

Gang Working:
✗   None

Ditches:
✗   possible ditches, but none defined.

Number of Ditches:  0

Annex:
✗   None

References

Grant, I. and Jones, N.W. 2008. Defended enclosures in North-east Wales, 2007-08, Project Report, CPAT Report No 921, Welshpool: CPAT.



Terms of Use

This work is licensed under CC BY-SA 4.0 and should be cited as:

Lock, Gary and Ralston, Ian. 2024. Atlas of Hillforts of Britain and Ireland. Available at: https://hillforts.arch.ox.ac.uk


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