Butchart Dam No. 5 is an embankment dam situated in the Goldstream Watershed near Victoria, British Columbia, forming part of the Capital Regional District's regional water supply system at Butchart Lake.

The dam's right abutment is underlain by fractured karst limestone, which created high bedrock permeability once the reservoir reached full capacity, leading to seepage and the development of sinkholes at the downstream toe of the embankment.

To address this, the CRD engaged Menard Canada to carry out permeation grouting across a roughly 1,000 m² treatment area — a 50-metre-long curtain extending to a depth of 20 metres.

This technique reduced bedrock permeability and curtailed the seepage pathway, with a measurable drop in downstream water levels observed almost immediately after treatment.