Watching brief during repairs to a section of collapsed stone built culvert. The temporary removal of spoil around and overlaying the collapsed culvert. The installation of a length of new plastic pipe, the re-profiling of the spoil heap at a shallower an more stable angle. No features relating to the 19th century mine complex were revealed by the groundworks, the watching brief achieved its aim of documenting the culvert repairs and the reprofiling of the mine spoil heap. All exposed sections of the masonry arched culvert were recorded prior to the installation of new plastic piping. The composition of the mine spoil heap was better understood, allowing consideration of how its volume and mass impact on the masonry arched culvert.