This report presents the results of archaeological investigations carried out on behalf of Kildare County Council as part of Archaeological Services Contract No. 4 ? Resolution, Prumplestown to Powerstown, prior to the commencement of construction on this section of the N9/N10 Kilcullen to Waterford Scheme: Kilcullen to Powerstown. The work was undertaken with site registration number E2570, under Ministerial Direction Number A021/012, in the Townland of Burtonhall Demesne, Co. Kildare. The Minister for the Environment, Heritage and Local Government, following consultation with the National Museum of Ireland, directed that Angus Stephenson of Headland Archaeology (Ireland) Ltd should proceed with archaeological resolution. Archaeological testing carried out under the N9/N10 Kilcullen to Waterford Road Scheme Archaeological Services Contract No. 3, Test Excavations Area 4, Prumplestown to Powerstown under Ministerial Direction Number A021/012 on this site in July and August 2005 identified two circular pits with high charcoal content, associated with worked stone, prehistoric struck flints and burnt animal bone and a piece of medieval pottery. Machine?stripping of topsoil for the resolution phase was commenced on Monday 6 February, 2006 and was largely completed over the next three weeks, although topsoil and subsoil stockpiling operations continued by machine in this field until Tuesday 14 March. Full archaeological resolution by way of hand excavation of archaeological features was conducted on the site between Wednesday 12 April and Friday 9 June 2006. Excavation revealed the line of the former field boundary ditch and several other modern agricultural features. Granite outcropping at the top of the sloping site showed toolmarks, presumably also of relatively modern date, and the whole field contained very large numbers of socket holes from the gathering of loose granite boulders for general field clearance and use as building material. Approximately 100 cut features of potentially archaeological origin were excavated and recorded, mostly along a slight protected ridge near the top of the hill. These appeared to cover a wide date range from the Neolithic to the modern period and for the most part comprised pits and postholes, some of which showed signs of in situ burning, with inclusions of pottery, flint artefacts, burnt bone, burnt clay flecks, bone fragments and carbonized grain recovered from some features. Stratified finds from these features included Neolithic and Bronze Age flint tools, debitage, flakes and cores and potsherds, a broken Neolithic polished stone axe?head, medieval and post?medieval potsherds, fragments from a riveted early medieval bone comb and fragments of several other metal artefacts. One group of features appears to have been a group of postholes laid out in an irregular but roughly circular pattern, representing a possible prehistoric structure of Late Neolithic/ Early Bronze Age date. Two parallel linear cuts, 4.9 m and 2.2 m long respectively, appear to have been structural foundations for a rectangular building of early medieval date built from turf, clay and timber. Many of the pits, some of which were contemporary with the building foundations, were used for dumping domestic waste. A few pits contained evidence of in situ burning, suggesting that they may have been used as outdoor hearths or fireplaces. Radiocarbon dates from samples taken from pits on the site indicate that it may have been occupied for several hundred years from the early medieval period to the medieval period, between the 7th and 14th centuries.