Corrimony Hydro Scheme, Glenurquhart, Drumnadrochit Archaeological Watching Brief: Data Structure Report
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Corrimony Hydro Scheme, Glenurquhart, Drumnadrochit Archaeological Watching Brief: Data Structure Report AOC Project Number: 70144 August 2017 © AOC Archaeology Group 2017 Corrimony Hydro Scheme, Glenurquhart, Drumnadrochit Archaeological Watching Brief: Data Structure Report On Behalf of: Glen Hydro Development Ltd 9 Reform Street Blairgowrie Perthshire PH10 6BD National Grid Reference (NGR): NH 37262 29190 Planning Reference: 14/01569/FUL AOC Project No: 70214 Prepared by: S. Williamson Illustrations by: S. Williamson Date of Fieldwork: October 2016 – June 2017 Date of Report: 30thAugust 2017 OASIS No.: aocarcha1-294424 This document has been prepared in accordance with AOC standard operating procedures. Authors: Sam Williamson Date: 30/08/2017 Approved by: Mary Peteranna Date: 30/08/2017 Report Stage: Final Date: 31/08/2017 Enquiries to: AOC Archaeology Group Ardyne Studio Bank Street Ross‐shire IV11 8YE Mob. 07972 259255 Tel. 01381 600938 E‐mail [email protected] www.aocarchaeology.com 70144: Corrimony Hydro Scheme, Glenurquhart, Drumnadrochit Archaeological Watching Brief: Data Structure Report Contents Page List of figures .................................................................................................................................................................... 2 List of plates ...................................................................................................................................................................... 2 List of appendices ............................................................................................................................................................. 2 Abstract .............................................................................................................................................................................. 3 1.0 Introduction .......................................................................................................................................................... 4 2.0 Project Background ............................................................................................................................................. 4 3.0 Site Visit ................................................................................................................................................................. 6 4.0 Watching Brief Methodology ............................................................................................................................... 6 5.0 Watching Brief Results ........................................................................................................................................ 8 6.0 Conclusion and Recommendations ................................................................................................................... 9 7.0 References ............................................................................................................................................................ 9 List of figures Figure 1: Location plan of Corrimony Hydro Scheme Figure 2: Over view of surveyed sites and excavated archaeology Figure 3: Archaeological overview: pits 003 and 007, field drain 005, and path 023/Site 3 Figure 4: Archaeological overview: field boundary Site 5 and path 025 Figure 5: Archaeological overview: cairn 022, pit 020, and field boundary 024/Site 8 Figure 6: Archaeological overview: Sites 9, 10, 30, 31 and 32 Figure 7: Archaeological overview: Site 20 Figure 8: Section drawings of pit 003, 007 and 020 Figure 9: Post-excavation plan of Site 20 List of plates Plate 1: Looking northeast over Site 20, a likely water supply tank Plate 2: Pre-excavation shot looking north across the powerhouse area Plate 3: Pre-excavation shot looking northeast downhill along the pipeline route Plate 4: Southwest-facing section of pit 003 Plate 5: West southwest-facing section of pit 007 Plate 6: Southwest-facing section of pit 020 Plate 7: Looking northwest across field drain 005 Plate 8: Looking west across clearance cairn 022 Plate 9: Looking east across cut terrace path cairn 023 Plate 10: Looking west across track 025 Plate 11: West-facing section of turf bank 024 List of appendices Appendix 1: Gazetteer of Archaeological Sites (Walkover Survey) Appendix 2: List of Photographs Appendix 3: Context Register Appendix 4: Sample Register Appendix 5: Drawing Register © AOC Archaeology 2017 | PAGE 2 OF 29 | www.aocarchaeology.com/inverness 70144: Corrimony Hydro Scheme, Glenurquhart, Drumnadrochit Archaeological Watching Brief: Data Structure Report Abstract This report details the results of an archaeological watching brief at the site of a new run-of-river hydro scheme along the River Enrick at Corrimony, Glenurquhart. The watching brief requirement arose due to a number of archaeological sites being identified in a previous walkover survey. Ahead of development in October 2016, a concrete structure was evaluated in order to create a record of the site prior to development. Further sites recorded during a demarcation survey included a possible cairn and two shielings, all of which were fenced off for their protection. A watching brief was carried out intermittently between February to June 2017, where ground works for the associated hydro scheme structures, pipeline route and access tracks were monitored. A clearance cairn, a field boundary, a field drain and three pits of unknown age, which were impacted upon by the works, were excavated and recorded. No archaeological artefacts were recovered. © AOC Archaeology 2017 | PAGE 3 OF 29 | www.aocarchaeology.com/inverness 70144: Corrimony Hydro Scheme, Glenurquhart, Drumnadrochit Archaeological Watching Brief: Data Structure Report 1.0 Introduction 1.1 An archaeological watching brief was required by The Highland Council in respect to the construction of a run-of-river hydro scheme on the River Enrick at Corrimony, Glenurquhart. The development consists of a penstock, powerhouse, intake and outfall at the Corrimony RSPB Reserve (14/01569/FUL). The aim of the watching brief as per the Written Scheme of Investigation (Fraser & Peteranna 2016) was to identify and record any archaeological features directly impacted upon by groundbreaking works. 1.2 The proposed development lies within the administrative area of The Highland Council, which is advised on archaeological matters by Kirsty Cameron, Archaeologist, Historic Environment Team. The watching brief was specified in keeping with the policies outlined in Scottish Planning Policy (2014) and PAN 2/2011 Planning and Archaeology (2011) in order to record the extent and significance of any archaeological remains which may be present within the development area. 1.3 The works were carried out intermittently from October 2016 to June 2017 and comprised pre-development survey and small evaluation of a structure in October, and the watching brief from February to mid-June. 2.0 Project Background 2.1 The proposed hydro scheme site is located on the west side of the River Enrick to the south of Corrimony, Drumnadrochit, with the intake situated at NGR NH 37187 28552 and the powerhouse at NGR NH 37524 29857 (Figure 1). Archaeological monitoring was to be carried out from the point where the pipeline route crossed out of commercial forestry (NH 37174 29484) to the powerhouse. 2.2 The watching brief requirement and mitigation measures had arisen due to a number of archaeological sites being identified along the pipeline route during a desk-based assessment and two walkover surveys conducted by Highland Archaeological Services (HAS) in 2013 and 2014 (McKeggie and Wood 2014). This survey data was incorporated into the survey and watching brief work carried out by AOC Archaeology to inform mitigation strategies for preventing damage to existing sites where avoidable, and can be viewed in full in Appendix 1. Generally the sites within the vicinity of the development are post-medieval in date and related to an agricultural function, comprising field boundaries, enclosures, possible structures, paths and roadways, and footbridges. The Bronze Age burial cairns at Corrimony are located close to the hydro pipeline landscape and represent significant prehistoric archaeology. © AOC Archaeology 2017 | PAGE 4 OF 29 | www.aocarchaeology.com/inverness 70144: Corrimony Hydro Scheme, Glenurquhart, Drumnadrochit Archaeological Watching Brief: Data Structure Report Figure 1: Location plan of Corrimony Hydro Scheme © AOC Archaeology 2017 | PAGE 5 OF 29 | www.aocarchaeology.com/inverness 70144: Corrimony Hydro Scheme, Glenurquhart, Drumnadrochit Archaeological Watching Brief: Data Structure Report 3.0 Site Visit 3.1 A revision to the pipeline route necessitated a site visit on October 5th 2017. The new route was walked by an archaeologist to identify any archaeological features that could have been impacted upon by ground works. Three additional sites were identified – a cairn (Site 30) and two possible shielings (Sites 31 and 32). These have been added to the Site Gazetteer (Appendix 1; Figure 6). Site 31 is believed to be a more accurate representation of the same feature identified in the 2014 survey as an enclosure, Site 10. Sites 31-32 comprised low grass-covered banks that appear to form the remains of two shielings. The cairn, Site 30, consisted of a grass-covered mound spread to 11m by 9m and up to 1m high, situated on the edge of the hillslope. There was some stone visible through the turf and a slight dip at the top suggested there may be a structural element