This report speaks directly to the very complex issue of stormwater management and residential flooding. To appropriately address the issue, it is important to appreciate that stormwater management and storm drainage, particularly in an urban environment, is an extremely complicated, dynamic and interdependent matter that has become and will continue to be an even more difficult challenge as a result of severe weather events. Included in the report is a background summary of the significant investment and strategic work that has been undertaken by the City over the past 12 years through its Pollution Prevention and Control Plan (PPCP).
In presenting this report and asking Council to consider specific recommendations to assist with stormwater related flooding, it is important to appreciate the “big picture” considerations and the scope and magnitude of the challenges that the City must address.
Pollution Prevention Control Plan (PPCP)
As mentioned, in the background section, the PPCP as set out in the Phase II Report (1999), consists of two (2) components; (1) the Short Term Pollution Prevention and Control Plan, and (2) the Long Term Pollution Prevention and Control Plan.
The Short Term Plan included items, which were to be implemented over five (5) to ten (10) years, and provided a foundation for the Long Term Pollution Prevention and Control Plan measures. The Long Term Plan had a planning horizon of twenty (20) to twenty-five (25) years.
Key elements of the Short Term Pollution Prevention and Control Plan are as follows:
· Collection System Management
· Combined Sewer Overflow (CSO) Controls
· Measures to reduce basement flooding
· Stormwater Management
· Pollution Prevention
· Enhanced sewage treatment at the Atlantic Avenue Water Pollution Control Plant.
Key elements of the Long Term PPCP are as follows:
To date, more than $100 million has been invested in improvements in accordance with the PPCP.
· Collection System Management
· Basement Flooding
Costs to date from 2003 to 2010 are as follows:
Water Pollution Control Plant $69,104,000
Rehabilitation of Sanitary Sewers $ 6,986,766
Elimination of Combined Sewers $ 7,388,451
Upgrade of Combined Sewer Overflows $ 360,530
Golf Links Trunk $ 1,114,137
Barepoint Backwash $ 1,642,970
CCTV Camera Sewers $ 1,479,770
Total to date $100,323,624
Current and Future Costs as per long term capital budget include:
Elimination of Combined Sewers $ 1,000,000 annually
Rehabilitation of Sewers $ 2,400,000 annually
The Pollution and Prevention Control Plan as well as other planned asset management replacement strategies have made a significant improvement in reducing the occurrences of localized flooding from 1999 to date – specifically in the areas of Westfort and McKellar Wards.
Thunder Bay Pollution Prevention and Control Plan
The City of Thunder Bay, with participation and funding assistance from the Province of Ontario and the Federal Government through the Great Lakes 2000 Cleanup Fund, commissioned a study in late 1993 to develop a Pollution Prevention and Control Plan (PPCP) for the City. The prime purpose, of the Plan, was to determine the extent of contamination of the watercourses passing through the City and Lake Superior, due to direct municipal discharges. The study was to recommend ways to reduce this pollution and also to provide a detailed plan to reduce the risk of basement flooding, due to the surcharging of the Sanitary Sewer System.
In 1995, Administration presented to Committee of the Whole, Phase I of the Study that focused on the “State of the System”. The recommendations were approved and, as a result, Administration proceeded with the Phase II Study, which was to set out the short and long term objectives. Phase II was presented to Committee of the Whole in 1999.
The Phase I report confirmed that adverse impacts on the water quality in streams passing through the City, due to the combined sewer overflows and storm sewers, were considered to be relatively minor and have not resulted in serious deterioration of water quality in the streams to date.
The Phase I report also reviewed the performance of the Atlantic Avenue Water Pollution Control Plant. The plant was found to have adequate capacity for development expected to the year 2015, but the report recommended that secondary treatment facilities be added to reduce the pollution loading being discharged into the Kaministiquia River.
In 1999, City Council also authorized Administration to carry out pilot evaluation testing of various secondary sewage treatment processes. The Secondary Sewage Treatment Plant commenced with construction in 2002.