Associated Engineering cleans up

As part of the City of Edmonton's Capital City Cleanup initiative, Associated Engineering took charge of keeping the sidewalks around our building, Associated Engineering Plaza, clean. Led by President, Kerry Rudd, and Vice President, Rod Karius, Associated Engineering staff picked up garbage and made a clean sweep of the sidewalks on 109 Street. During the wrap-up event for the Capital City Cleanup Program, Edmonton Mayor Mandel acknowledged Associated Engineering’s exceptional participation in the program. The Mayor commented on our visibility and the fun/social element of our involvement. Thank you to all of the staff involved in the cleanup!

Marine seismic surveys effectively used to map bathymetry and submarine topography

Marine seismic surveys are commonly used to map bathymetry, sedimentary layering, presence of boulders in the sediment, and submarine bedrock topography. During the past summer, Associated Mining Consultants Ltd. (AMCL) has conducted a series of marine surveys for a variety of exploration objectives. Projects have included surveys of False Creek in Vancouver for a tunnel in the Richmond Airport Vancouver Rapid Transit Project, MacKay Lake in the Northwest Territories for mining exploration, bathymetry for seismic upgrading of the Knight Street Bridge, a pipeline crossing of the Fraser River for Terasen, and Gray’s Bay in Nunavut for a port facility investigation.

Data acquisition set up for the seismic survey

The seismic systems used for projects of this type vary according to the objectives such as investigation depths and resolutions. The survey conducted at Gray’s Bay, for instance, used a bubble pulser. This system produced a 400 Hz wavelet, with an approximate bandwidth from 200 to 800 Hz. The bubble pulser allows the mapping of sediments from water bottom to bedrock up to 75 metres deep. The results at Gray’s Bay with this source were of particular interest. Results clearly showed the water bottom, sedimentary sequences above bedrock, and the bedrock topography. Of significance from a design perspective is the relatively narrow bedrock occurring at approximately 200 metres chainage. The results of the survey illustrated bedrock topography and water bottom bathymetry as isopach maps as well as cross sections of the sub bottom. The survey was conducted for Holgar Hartmaier, P.Eng., M.Eng. of BGC Engineering Inc. in Calgary by Claude Robillard and Robert Perrin of AMCL. Associated Mining Consultants Ltd. (AMCL) is a subsidiary of the Associated Engineering group of companies. AMCL has offices in Calgary and Burnaby. Contact Jim Henderson at hendersonj@amcl.ca for more information.