On January 25, 2007, the City of Yorkton and the Federation of Canadian Municipalities (FCM) entered into a jointly funded study entitled "City of Yorkton Water Treatment Plant Wastewater Reuse Feasibility Study." Funding administered by the FCM was made available through the Federal Government's Green Municipal Fund. Associated Engineering was retained by the City of Yorkton to provide engineering and management services for this study.
The main objective of this study was to identify and confirm the viability of a long term, cost effective and environmentally responsible system to treat, dispose of and re-use process wastewater generated at the Queen St Water Treatment Plant (QSWTP). It was also the objective of the City not to increase the hydraulic load on the existing sewage collection system and wastewater treatment plant, therefore providing additional system capacity to facilitate growth within the community without having to expand the wastewater treatment plant.
Logan Greens was the proposed study site, and is located east of Gladstone Avenue, north of Queen Street, West of Highway #9, and south of the residential lots located off of Logan Crescent. The area was zoned as Environmentally Sensitive due to the shallow aquifer that underlies most of the study site. This requires any site development to be approved by the City of Yorkton. The proposed concept plan for this study involves a mixture of treated QSWTP backwash water and storm water runoff flowing east by gravity from a wetlands area(s) into a proposed infiltration pond.
The City of Yorkton Water Treatment Plant Wastewater Reuse Study was designed as a water reclamation system that will make use of the process wastewater coming from the City's water treatment plant. Rather than directing filter backwash water from the water treatment plant to the City's sanitary system, the process wastewater is to be diverted to two sedimentation ponds. Eventually the water will lead to a fish pond. This process will not only benefit the environment by creating a habitat for fish and other animals, but will avoid adding load to the City's sanitary system. Costly infrastructure required to convey the wastewater and upgrade the City's wastewater treatment plant is thereby avoided.
The study participants provided valuable direction and guidance to the study team. Iinformal discussions were held in order to obtain additional concepts that the study participants would like to see incorporated within the study. A number of ideas were generated and included the following:
- Soccer pitches to attract high profile tournaments;
- Ball diamonds;
- Parking and concession facilities;
- Expansion of the existing tree nursery;
- Re-routing of surface water to augment infiltration and attenuate downstream flows; and
- Re-routing and expansion of the existing cycling and pedestrian paths to take advantage of
the education component of the study.
The study has been formally endorsed by many residents and representatives of organizations within the City of Yorkton. It has also been approved by City Council. The earthworks for the construction of the sedimentation ponds, linear wetlands, fish pond and soccer pitches were approved by the Ministry of Environment on July 25, 2011. Construction of the earthworks began in August 2011 and completion is scheduled for the summer of 2012. Implementation of the remaining components of the study in a phased approach is recommended. This approach will facilitate sequential construction requirements, maximize local contractor involvement and spread out capital cash flow over a greater period of time.
Project components nearing completion include:
- Earthworks for the sedimentation ponds, linear wetlands, fish pond and rough grading for the soccer pitches;
- Multi-use sporting fields (irrigation, grass seeding, fencing, washrooms, etc.);
- Installation of walking and bike paths;
- Planting of trees, shrubs and grass; and
- Interpretive signage
View the report here: City_of_Yorkton_WTP_Wastewater_Reuse_Feasibilty_Study