Stormwater Network
The County maintains a diverse stormwater network to protect County residents and businesses, along with our natural and built environments. The County is responsible for all stormwater assets within a County right of way. Due to the interconnected nature of stormwater assets throughout the County, analysis on stormwater flows is completed holistically.
The County’s stormwater network is categorized into various components, as a result of differing life spans and maintenance strategies. They are culverts with a diameter below 3 meters, catchbasins, catchbasin leads, storm mains and laterals.
Inventory
| Asset Component | Unit | Current Inventory | Replacement Cost |
| Catchbasins | each | 3,155 | $13,537,815 |
| Catchbasin Lead | length (m) |
17,310 |
10,231,128 |
| Culverts <3m | length (m) | 64,528 | 57,637,915 |
| Storm Lateral | length (m) | 138 | 80,584 |
| Storm Main | length (m) | 74,442 | 65,092,929 |
| Total Replacement Cost | $146,580,371 | ||
The replacement cost valuation for the assets in our stormwater network are based on current tender prices, where available. The replacement values assume that work is completed in conjunction with other lifecycle projects, such as road rehabilitation and linear water and wastewater asset replacement.
Condition
The assessment approach utilizes a combination of physical assessments, asset attributes, such as material and sizing, as well as established anticipated useful lives.
The County anticipates commencing an annual CCTV program beginning in 2026. As the physical condition assessments are completed, they will be incorporated into the overall condition rating of the related asset.
Key Performance
| Key Service Attribute | LOS Statement | Performance Measure | 2022 | 2023 | Target |
| Safety | Providing a safe stormwater network which mitigates the impacts of property damage during stormwater events | % of properties in municipality resilient to a 100-year storm | 97.7% | 98.1% | TBD |
| % of the municipal stormwater management system resilient to a 5-year storm (urban areas and settlement villages) | 89.5% | 89.8% | TBD |
Funding Gap Analysis
This portfolio is currently funded through an annual levy contribution to the Stormwater reserve, the use of Ontario Community Infrastructure Funding (OCIF), and an annual allocation of interest earned.
The graph illustrates the anticipated asset management needs (expenditures) and anticipated funding for the 10-year period of 2024-2033, reflecting an approximate $4.9 million surplus in funding availability over the period.
Filling the data gaps and increasing the confidence level of our stormwater data is a significant undertaking; this project continues to receive prioritization with County staff. While the data continues to mature under this portfolio, staff will evaluate needs and funding sources (including annual contribution from the levy to the Stormwater reserve and OCIF allocation) as part of each business plan and budget cycle.