To help restore the water quality further, we accomplished a major civil engineering feat, to repair the carved limestone of the historic Tillington tunnel, the largest of the tunnels that feeds water into the pond running from Tillington. The tunnel had collapsed in a number of places thereby reducing the flow but by preserving the historic infrastructure that feeds the pond it helped improve the water quality and restore the look of the landscape created by Capability Brown.
The shape of the Upper Pond has changed over time and the crisp lines around the edges have shifted. We repaired the coping stones surrounding the pond this year and replaced some in a reinforced mortar to define the shape of the pond just as it was initially designed.