The N4 Sligo Inner Relief Road and County Extension (N4 SIRR) development involves the construction of a new dual carriageway extending north from the Carrowroe Roundabout on the existing N4 in Tonafortes Townland. This will run through a rural environment at first, then continue through the Sligo urban area and terminate at the Michael Hughes Bridge, at the junction of Custom House Quay and Ballast Quay in Rathedmond Townland. The development covers a distance of 4.2 km. An extensive programme of archaeological investigation associated with the development commenced in 2001 with test excavations being carried out by Mary Henry Ltd. These test excavations took the form primarily of a series of 2m-wide trenches excavated along the length of the route. They were aimed at assessing the archaeological potential of the route and a number of definite and potential archaeological features already identified there. This testing identified eleven areas of archaeological potential and included testing on the henge enclosure in Tonafortes Townland (RMP SL014-224). Full archaeological excavation of these eleven areas commenced in April 2003 and was carried out by Archaeological Consultancy Services (ACS) Ltd. As part of numerous sites excavated along the route of the N4 SIRR, Area 1E/2E and Area 1E Extension (hereafter referred to as Area 1E Extension) was one of at least 11 sites excavated along a one kilometre stretch which lay on the eastern and northern banks of a boggy valley and relict lake bed. The site was located in the townland of Caltragh which has proved to be extremely rich in archaeological remains. Evidence of domestic, ritual, burial and industrial activity from the prehistoric period has been found in this small area of interest. NOTE: THE CO-ORDINATES GIVEN ON THE REPORT PROOVED INCORRECT. CORRECT CO-ORDINATES INCLUDED IN THIS METADATA.