This report presents the results of archaeological investigations carried out on behalf of Kildare County Council and the National Roads Authority as part of Contract 4 ?Archaeological Services prior to the commencement of construction on the N9/N10 Kilcullen to Waterford Scheme: Kilcullen to Powerstown. The work was undertaken under National Monuments Section Registration Number E2626, in the townland of Prumplestown Lower, Co. Kildare. The Minister for the Environment, Heritage and Local Government, following consultation with the National Museum of Ireland, directed that Liam Hackett of Headland Archaeology Ltd should proceed with archaeological resolution. Contract 1 Variation Pre?Construction Testing under Ministerial Direction number A021/106 by I.A.C, on this site in November, 2005 identified seven possibly prehistoric pits (Lynch and Whitty 2005). The following extract is taken from the testing report: Site 4.62 (A021/107) Site A021/107 was identified as a linear feature C5, a possible slot trench which was NE?SW aligned and which turned NW?SE to form a corner. C5 was rectilinear in plan. Two postholes C3 and C7 cut into C5. C7 was located at the NE corner of the possible structure. Two smaller stakeholes C9 and C11 were located SE of C5. C3 was a circular posthole which was cut into possible slot trench C5. C3 had a diameter of 0.75m and was filled by C4, a mid to dark brown sandy clay of loose compaction which had occasional charcoal flecking. C5 was a linear feature/ possible slot trench was NE?SW aligned. C5 measured 6m in length, had a width of 1m and a depth of 0.30m. The primary fill of C5 was C6 a light brown sandy clay of loose compaction and contained occasional charcoal flecking and occasional small sub angular stone inclusions. A sherd of possibly prehistoric pottery was retrieved from the fill C6. The secondary fill of C5 was C20, a mid yellow/brown silty clay. Another fill was visible at the eastern end of C5 which was C19, a mid grey/brown sandy clay which contained occasional charcoal flecking. C7 was a circular posthole, which had a diameter of 0.45m and was cut into the NE end of C5. C8 was filled by a mid brown sandy clay of loose compaction which contained occasional charcoal flecking. C9 was a possible stakehole, which had a diameter of 0.20m. C9 possibly cut C5. The fill of C9 was C10, a dark brown/black loose silty clay which contained very frequent charcoal inclusions. C11 was a possible stakehole, which had a diameter of 0.25m. The fill of C11 was C12, a loose dark brown silty clay which contained a moderate amount of charcoal flecking. C13 was a possible posthole located 4m south of C5. C13 was 0.50m in diameter and was filled by C14 a dark grey/brown loose sandy silt which contained occasional charcoal flecking. Full archaeological resolution was conducted on this site between 4 April and 14 April 2006. This revealed the presence of a possible prehistoric habitation site, together with a substantial flint assemblage and evidence of on site flint and chert processing.