HPC and Stability Assessment of the water retaining and appurtenant structures of the Backus Mill Dam Reservoir, in accordance with the MNRF Guidelines (2011). A PSA was performed for the dam in accordance with the CDA Guidelines (2011).
The Backus Mill Dam, built in the 1800s (date uncertain), is a composite gravity dam with earthen embankments on either side of a concrete spillway with stop-logs for adjusting water levels. Portions of the embankment at Backus Mill Dam were previously determined to be steep and over steepened with areas of ongoing localized loss of material, and the concrete spillway required rehabilitation. Calculations were prepared for the embankment and concrete spillway stabilization, and construction drawings with embedded technical specifications were also prepared.
The project started in December 2016 and the documents were completed in March 2017.