County: Offaly Site name: CORHILL BOG, Lisdermot/Straduff
Sites and Monuments Record No.: N/A Licence number: 00E0400, 00R057
Author: Ellen OCarroll, ADS Ltd.
Site type: Road - gravel/stone trackway - peatland
Period/Dating: Medieval (AD 400-AD 1600)
ITM: E 613427m, N 727868m
Latitude, Longitude (decimal degrees): 53.300935, -7.798552
A metal-detection survey took place along the length of site 00E0400. Because of the location of this site within the peat strata, a medieval date was suggested for the trackway. The detection device used for the survey was a White’s Quantum II. The detection device was first tested to see how effective it would be in the peat environment. A key was placed in the peat at various levels, and the detector proved effective up to a depth of 0.2m.
All field surfaces along the length of the gravel and wood trackway were walked systematically. An area 10m either side of the trackway was laid out, and then the area within was walked at 2m intervals. No metal artefacts of archaeological interest were retrieved. Some modern Bord na Móna machinery parts were the only metal objects located. The trackway was over 0.4m deep in places, and the metal-detection device only worked efficiently to a depth of c. 0.2m. As a result the possibility of finding metal artefacts underneath the site was unlikely.
Windsor House, 11 Fairview Strand, Fairview, Dublin 3
