NRDO Roscommon N5 Strategic Corridor –Route Corridor Selection Report March 2010 Appendix 3C Archaeology, Architecture and Cultural Heritage Appendices N5 Strategic Corridor Phase 3 Route Selection Study for Archaeological, Architectural and Cultural Heritage Authors: Stephen Doyle & Mark Moraghan Client: Roscommon County Council /National Roads Authority Date: March 2009 Archaeological Development Services Ltd Contents Tables........................................................................................................................................................4 1. Introduction................................................................................................................................5 1.1 General Background......................................................................................................5 1.2 Route Corridor Options.................................................................................................5 1.3 Route Selection Study Process......................................................................................5 1.4 Key Constraints.............................................................................................................6 1.5 Route Selection Study Objectives.................................................................................8 2. Description of the Route Corridor Options.............................................................................9 2.1 Route Corridor Option 1................................................................................................9 2.2 Route Corridor Option 1A.............................................................................................9 2.3 Route Corridor Option 2................................................................................................9 2.4 Route Corridor Option 2A.............................................................................................9 2.5 Route Corridor Option 2B...........................................................................................10 2.6 Route Corridor Option 3..............................................................................................10 2.7 Route Corridor Option 4..............................................................................................10 3. Methodology.............................................................................................................................11 3.1 Desk Based Study........................................................................................................11 3.2 Site Inspection.............................................................................................................14 4. Archaeological, Architectural and Cultural Heritage in the Receiving Environment......16 4.1 Archaeological and Historical Background................................................................16 4.2 Record of Monuments and Places (RMP)...................................................................19 4.2.1 Recorded Monuments within Route Corridor Option 1..............................................20 4.2.2 Recorded Monuments within Route Corridor Option 1A...........................................23 4.2.3 Recorded Monuments within Route Corridor Option 2..............................................26 4.2.4 Recorded Monuments within Route Corridor Option 2A...........................................31 4.2.5 Recorded Monuments within Route Corridor Option 2B...........................................36 4.2.6 Recorded Monuments within Route Corridor Option 3..............................................40 4.2.7 Recorded Monuments Route Corridor Option 4.........................................................45 4.3 The Topographical Files, National Museum of Ireland (NMI)...................................50 4.3.1 Route Corridor Option 1..............................................................................................50 4.3.2 Route Corridor Option 1A...........................................................................................51 4.3.3 Route Corridor Option 2..............................................................................................51 4.3.4 Route Corridor Option 2A...........................................................................................52 4.3.5 Route Corridor Option 2B...........................................................................................53 4.3.6 Route Corridor Option 3..............................................................................................54 4.3.7 Route Corridor Option 4..............................................................................................55 4.4 Areas of Archaeological Potential...............................................................................57 4.4.1 Route Corridor Option 1..............................................................................................57 4.4.2 Route Corridor Option 1A...........................................................................................58 4.4.3 Route Corridor Option 2..............................................................................................59 4.4.4 Route Corridor Option 2A...........................................................................................60 4.4.5 Route Corridor Option 2B...........................................................................................61 4.4.6 Route Corridor Option 3..............................................................................................63 4.4.7 Route Corridor Option 4..............................................................................................63 4.5 Aerial Photographs & Flyover....................................................................................65 N5 Strategic Corridor, Route Selection Study, Archaeological, Architectural & Cultural Heritage 2 Archaeological Development Services Ltd 4.6 Cartographic Analysis of early Ordnance Survey 6” Maps........................................65 4.7 Architectural Heritage.................................................................................................66 4.7.1 Route Corridor Option 1 Architectural Constraints from Desktop Survey.................67 4.7.2 Route Corridor Option 1A Architectural Constraints from Desktop Survey..............70 4.7.3 Route Corridor Option 2 Architectural Constraints from Desktop Survey.................73 4.7.4 Route Corridor Option 2A Architectural Constraints from Desktop Survey..............75 4.7.5 Route Corridor Option 2B Architectural Constraints from Desktop Survey..............78 4.7.6 Route Corridor Option 3 Architectural Constraints from Desktop Survey.................80 4.7.7 Route Corridor Option 4 Architectural Constraints from Desktop Survey.................85 4.8 Consultations...............................................................................................................88 4.9 Key Constraints – Phase 3 Route Selection Study......................................................89 4.10 Cultural Heritage.........................................................................................................91 5. Predicted Impacts for All Route Corridor Options..............................................................92 5.1 Introduction.................................................................................................................92 5.2 Impacts within Route Corridor Option 1.....................................................................95 5.3 Impacts within Route Corridor Option 1A..................................................................99 5.4 Impacts within Route Corridor Option 2...................................................................103 5.5 Impacts within Route Corridor Option 2A................................................................109 5.6 Impacts within Route Corridor Option 2B................................................................115 5.7 Impacts within Route Corridor Option 3...................................................................121 5.8 Impacts within Route Corridor Option 4...................................................................127 6. Route Option Appraisal........................................................................................................135 6.1 Route Corridor Option 1 Summary of Impacts......................................................135 6.2 Route Corridor Option 1A Summary of Impacts......................................................137 6.3 Route Corridor Option 2 Summary of Impacts......................................................139 6.4 Route Corridor Option 2A Summary of Impacts......................................................141 6.5 Route Corridor Option 2B Summary of Impacts......................................................143 6.6 Route Corridor Option 3 Summary of Impacts......................................................145 6.7 Route Corridor Option 4 Summary of Impacts......................................................147 6.8 Preferred Route Corridor Option: Option 1A............................................................150 7. Conclusion..............................................................................................................................152 8. Bibliography...........................................................................................................................153 Appendix A List of meetings/consultations regarding