Challenges, opportunities for beneficial reuse of stormwater management pond sediment

By Francine Kelly-Hooper, Krista Barfoot, Luicito Dela Cruz and Glenna Pike

Thousands of stormwater management (SWM) ponds are engineered to provide flood protection and water quality treatment for urban developments across Canada. The routine removal of accumulated sediments is required in order to maintain flood control and water quality treatment efficiencies. However, waste disposal fees can cost hundreds of thousands to millions of dollars for each pond.

Read about possible reuse opportunities and challenges in ES&E Magazine’s October 2022 issue. See article references and tables below.

References

• O.Reg. 153/04 Tables (Table 1 background Site Condition Standards (SCS); O.Reg. 406/19 Table 2.1 (for potable groundwater); and Table 3.1 (for non-potable groundwater) Excess Soil Quality Standards (ESQS) for residential/parkland/institutional (RPI) and/or industrial/commercial/community (ICC) property use.
• Toronto and Region Conservation Authority (TRCA) 2016 Stormwater Management Pond and Wetland Sediment Inspection and Maintenance Guide

Survey Results Tables

• Table 1: Percentages of SWM Ponds with the Greatest Number of Insitu Sediment Exceedances of SCS and/or ESQS
• Table 2: 2005-2022 SWM Pond Insitu Sediment Quality Results
• Table 3: Wet In-situ versus Dry Ex-situ SWM Pond Sediment Quality Data
• Table 4: Statistical Difference Analysis Between Inlet, Centre, Outlet Insitu Sediment Sample Zones