Knypersley Spillway Repair – NATCEM® AC

Project – Knypersley Reservoir Spillway Repairs

Product – NATCEM® AC

Main Contractor – Kier

Client – Canal & River Trust

Designer – Arcadis

NATCEM® AC was successfully applied in a series of critical repairs at Knypersley Reservoir’s spillway, addressing key safety concerns identified in the latest Section 10 Matters in the Interests of Safety (MIOS) report.

The project focused on essential maintenance of the reservoir’s spillway and draw-off culvert. As part of these works, the Canal & River Trust engaged Arcadis to develop a design plan that would meet MIOS recommendations and address structural issues, including missing mortar and damaged blocks.

The spillway, primarily constructed from masonry, required careful repointing and crack filling to restore its integrity. Initial inspections had identified areas of missing mortar, cracks, and masonry damage, especially where durability was essential to prevent further structural degradation.

Following cleaning and preparation of the affected areas, NATCEM® AC was selected for use. Its flexibility and performance in thin applications made it the ideal choice for repairing narrow gaps and small voids in the spillway structure. This flexibility was critical in ensuring the mortar adhered well and provided a long-lasting repair, even in the structure’s most challenging areas.