
In order to meet the environmental objectives for the Jacques-Cartier Beach and St. Charles River and for flooding control in one area, Tetra Tech CSO prepared the CSO Long Term Control Plan (LTCP) for the City of Quebec between 1988 and 1995. The solution called for multiple storage basins to increase capacity at strategic locations and optimal operation of these basins.
Following the success of the pilot implementation of the real time control (RTC) technology, the City of Quebec decided to proceed with the implementation of a centralized RTC system and the construction of 16 storage facilities with capacities ranging from 2,600 m³ (0.7 MG) to 32,000 m³ (8.5 MG), at a total cost of $140 M. One major pumping station was also upgraded to increase capacity from 2 m³/s (46 MGD) to 3 m³/s (68 MGD). The construction phases are summarized as follows:
Activities carried out by Tetra Tech CSO during this project included:
Highlights
“In addition to reducing the occurrence of CSOs by 60% and the volume of contaminated water by 50%, RTC has also allowed over $90 million in savings in equipment that had been foreseen during the initial planning of this project. The Communautéurbaine de Québec has just completed its second year of operation with the new RTC CSO system and is very satisfied with the results.”
– Serge Allen, General Manager of Communauté urbaine de Québec