Erosion and Sediment Control Innovation in Highway Construction
Wednesday March 20, 2019
9:00 to 9:30 am
The presentation will provide an overview of new concepts for temporary erosion control and adaptive management that were piloted on a highway expansion project on the TransCanada Highway in Northwestern Ontario where high erosion risks were identified during design.
In order to achieve better performance in erosion and sediment control, the Ontario Ministry of Transportation (MTO) aimed to shift the focus of its efforts during highway construction to erosion control at the source, not solely sediment control at receptors, using a risk-based approach and an adaptive management process.
The project was located in MTO’s Northwest Region and involved expanding an 11 km section of highway from two lanes to four. The project occurred over multiple years and encompassed several sensitive watercourses with significant fisheries resources.
High-risk areas for erosion based on site and soil conditions and surrounding receptors were determined during design and identified in the contract documents. Non-standard tender items and special provisions were also included in the contract to require contractors to apply temporary erosion control measures in the identified high risk areas, to monitor the areas using trained personnel, and to meet weekly with the contract administrator to proactively discuss issues and adapt ESC measures as needed.
Results showed that contractors and contract administrators became and remained more engaged on ESC issues throughout the contract than has been traditionally experienced by MTO.
1. Benefits of shifting the primary ESC focus during construction to erosion control at the source.
2. MTO’s erosion and sediment control overview risk assessment process.
3. MTO’s trial contract documentation for temporary erosion control and adaptive management.
ABOUT THE PRESENTER
Brenda Carruthers has worked for the Ontario Ministry of Transportation for 33 years, with most of her career spent in the ministry’s environmental function.
She has developed policy for a variety of environmental factor areas to provide for environmental protection and legislative compliance during highway design, construction and maintenance including: waste and excess materials management, spills and contaminated property, fisheries, species at risk, wildlife mitigation, water taking and erosion and sediment control.
She also has considerable experience in development and standardization of environmental contract documentation for highway construction and contract administration.