Wastewater System - Woodstock
The County maintains a diverse portfolio of assets that are required to provide City of Woodstock residents and businesses with the safe collection and treatment of wastewater. The Woodstock Wastewater Treatment Plant (WWTP) provides wastewater treatment for residential, commercial, and industrial users in the City of Woodstock, as well as for the communities of Embro and Innerkip. It also provides treatment for septic tank waste, hauled waste, and holding tank waste from within the County.
The wastewater collection network consists of a mix of gravity mains, low pressure mains and forcemains. Wastewater flows by gravity wherever possible, where changing elevations require the use of sewage pumping stations (SPS). Other specialized structures such as manholes, valve vaults, meter stations, diversion structures and siphons are required to convey wastewater to the WWTP.
Inventory
| Asset Component | Unit | Current Inventory | Replacement Costs |
| Wastewater Treatment Plant | site | 1 | $84,565,669 |
| Sanitary Pumping Station | bldg | 5 | 12,435,836 |
| Other Facilities | bldg | 1 | 723,793 |
| Equipment | total | N/A | 30,839,143 |
| Sanitary Main (﹥=450mm) | metre | 39,508 | 71,636,773 |
| Sanitary Main (﹤450mm) | metre | 214,080 | 146,044,439 |
| Sanitary Service Connection | each | 16,314 | 74,848,632 |
| Total Replacement Cost | $ 421,094,285 | ||
The replacement cost valuation for the linear assets in this portfolio are based on current tender prices, where available. The replacement cost valuation for wastewater vertical is based on the latest information available, which includes current replacement costs, insurance valuations, inflation, and valuations from studies and assessments completed in prior years.
Condition
The assessment approach for our wastewater assets utilizes a combination of physical assessments, asset attributes, such as material and sizing, as well as established anticipated useful lives.
The percentage of assets in poor or critical condition has decreased from 38.6% as reported in the 2022 AMP to 37%, resulting from lifecycle strategies completed.
The percentage of assets in good or excellent condition has decreased from 47.6% as reported in the 2022 AMP to 36%. As assets continue to age their condition rating will decline until lifecycle strategies are triggered and completed.
Key Performance
| Key Service Attribute | LOS Statement | Performance Measure | 2022 | 2023 | Target |
| Reliability | Providing wastewater services with minimal interruptions | % of properties within the system boundary connected to the municipal wastewater system | 98% | 98% | TBD |
| The number of connection-days per year due to wastewater backups compared to the total number of properties connected to the municipal wastewater system. | 2 connection-days to 15,378 connections | 3 connection-days to 16,579 connections | TBD | ||
| Environmental Stewardship | Providing wastewater services that have minimal impacts on the environment | The number of effluent violations per year due to wastewater discharge compared to the total number of properties connected to the municipal wastewater system. | 2 violations to 15,378 connections | 1 violation to 16,579 connections | 0 |
Funding Gap Analysis
This portfolio is currently funded through an annual contribution to the Wastewater - Woodstock reserve, by wastewater rates in Woodstock, along with 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 $19.4 million deficit in funding availability over the period.
In accordance with the Water and Wastewater Rates Policy, the annual contribution to reserve should increase annually with inflation, along with additional increases to assist with closing the funding gap.
The deficit in funding availability may be partially managed through the issuance of debentures. The issuance of debentures results in a higher overall cost resulting from the inclusion of interest, however, would defer a portion of the funding needs beyond the 2024 to 2033 period. Consideration also needs to be given to the funding requirements of subsequent periods when deferring current obligations through the issuance of debentures.