Ecora has been retained by the City of Richmond (the City) to provide geotechnical engineering support related to a damaged sewer line located in a City right-of-way at 6380 Buswell Road where a sinkhole has damaged a sewer line. An existing BC Hydro pad mounted transformer (PMT 786) is located adjacent to the manhole and the City as well as BC Hydro are concerned that ongoing soil displacement could impact the transformer, electrical conduits and subsequently effect power supply to the nearby apartments.
Ecora has conducted a geotechnical drilling at the site comprising of solid stem auger holes to a depth of 8 m as well as the installation of a piezometer for groundwater monitoring and sampling. Ecora has been providing general emergency geotechnical support in relation to the damaged sewer. This has included a site visit, review of background information, coordination with BC Hydro, preparation of an underpinning design for the transformer and coordination with shoring contractors on pricing and constructability for the transformer underpinning works. Ecora’s scope was also expanded to include civil design support for the manhole replacement and contaminated sites review including soil and groundwater sampling.