Pen-y-Geulan, Cynwyd, Culvert Reconstruction

The Works comprise briefly of the replacement of the existing masonry culvert with a ‘free issue’ precast concrete box culvert. New parapets, stepped spillway, training walls and aprons will be constructed. The upstream ditch is to be regraded and lined with concrete canvas.• Maintaining traffic management.• Careful removal and infilling of existing culvert, including headwalls and fences to both elevations.• Excavation and new culvert laying, new stepped spillway, headwalls, training walls and aprons.• Collection (from Lon Parcwr Depot, LL15 1NA), delivery and offloading to site and installation of new ‘free issue’ precast concrete culvert units.• Waterproofing new culvert.• Construction of re-graded and concrete canvas protected inlet ditch.• Construction of masonry faced concrete headwalls, training walls, stepped spillway and parapets• Reinstatement of highway surfacing with new kerbs, carriageway markings and bollards.• Reinstatement of fencing to elevations.• Minimal use of full-highway closures.• Maintain safe vehicle access to Pen-y-Guelan.• Temporary works shall ensure that water can be conveyed with no pollution during the works until transferred into the new culvert (Note: River Dee SAC/SSSI is 170m downstream).• Diversion of unknown private copper water pipe assumed to be feeding cattle water.• Safe working within vicinity of buried BT cables.• Safe working within vicinity of 11kV buried and overhead line.• Safe working in excavations and support of surrounding structures.