1965 Downtown Uxbridge flooding following a collapse at the Brookdale Dam.
Water from a heavy rainstorm caused the Brookdale Dam south of Uxbridge to collapse, sending water rushing into Elgin Pond. The Pond overflowed across Mill St. and down Bascom St. The Brook expanded due to debris blocking the culvert under Brock St.W., creating a lake in present-day Centennial Park. Roads were washed out and considerable damage occurred to many properties.
1978 First hydrological and hydraulic study undertaken for the Uxbridge Brook
Models created at that time indicated a large flood hazard existed along the Uxbridge Brook. The modelling places the entire downtown core in the floodplain. This hindered development within the downtown and triggered the need for further study of flood remediation measures.
1983 Flood Relief Study commissioned by local Conservation Authority and Township of Uxbridge
A flood relief study was commissioned by the South Lake Simcoe Conservation Authority (now the Lake Simcoe Region Conservation Authority) and the Township of Uxbridge, to establish a comprehensive understanding of the Uxbridge Brook watershed and recommended measures to alleviate or minimize the potential for future flood related damage in the downtown area. The preferred alternative at that time was to construct new twin 4.2 m x 2.4 m concrete box culverts under Brock Street West adjacent to the existing culvert.
2008 LSRCA Flood Management Proposal to Uxbridge Council
In January 2008, the Lake Simcoe Region Conservation Authority (LSRCA) made a presentation to the Township of Uxbridge Council to consider a flood management proposal. According to the LSRCA presentation, during the peak of a Regional storm event (like Hurricane Hazel), water flow at the culvert would be ten times greater than a 1-in-100 year storm event. Consequently, there could be extensive flooding in the downtown during the peak of a Regional storm event, with water rising high enough to cover the first floor of several buildings on Brock Street West.
2009 Downtown Uxbridge Culvert Replacement Technical Project Steering Committee established
In September 2009, a Downtown Uxbridge Culvert Replacement Technical Project Steering Committee was established, with a mandate to: ensure that the overall objectives of the project remain in focus, provide overall guidance and direction to the consultant undertaking the Class Environmental Assessment and the design consultant, seek financial assistance from Federal, Provincial, and other funding agencies and liaise as necessary with the Township and Regional Councils, other governments, the public at large, concerned citizens, and affected property owners.
2010 Township undertakes an Environmental Assessment for Downtown Uxbridge Flood Reduction
The process of replacing the culvert begins with a Municipal Class ‘C’ Environmental Assessment procured through the Municipal Procurement process. The study was tasked with investigating alternatives to the existing culvert running through downtown. The process takes almost two years to complete and is done in tandem with seven supporting studies: a hydraulic study, geomorphic and environmental assessment of the Uxbridge Brook, culvert survey, cultural heritage and archeological study, building structural assessment, parking impact study and an environmental site assessment.
2012 EA findings are presented to Council
After more than two-years of in-depth studies, the Environmental Assessment is presented to Council. A twin culvert is the preferred solution adopted, which will replace the existing structure from Centennial Park, under Brock St. W. and continuing north.
2015 Small Communities Fund announced
In July at an event attended by representatives from all four levels of government, it is announced that the Federal and Provincial governments will each contribute more than $2.5 million to the Brock Street Culvert Project through the Small Communities Fund.
2016 Culvert path changes course
After failing to come to terms with a property owner, the Township investigated alternative options for the location of the Brock Street Culvert with an additional environmental assessment. A revised environmental assessment was required to explore options and costs for realignment of the culvert's path.
2018 Detailed designs and permits completed
The largest municipal infrastructure project in the Township’s history moved closer to reality in early 2018, when detailed designs for the Brock Street Culvert Project were completed. In June, five construction companies were pre-qualified to bid on the project.