Curtis Creek Channel Improvements

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Project overview

The proposed project includes a review of the entire natural channel system throughout Curtis Creek from the Trent Canal to Tivey Street. Flood reduction and natural channel improvements will be designed where measurable flood reduction and channel erosion control benefits can be implemented. Curtis Creek through the project area traverses through a number of private residential lots and public lands.

The proposed works have been designed to reduce flooding by modifying portions of the channel and providing an appropriate low flow channel throughout the system. Flooding occurs when stream flows present a hazard by coming in contact with private or publicly owned buildings and infrastructure. It should be noted that while the proposed works will significantly reduce flooding during the majority of rainfall events, overflowing of stream banks will still occur during intense storms.

The recommended works will incorporate the principles of natural channel design by better utilizing floodplain storage on public land, and natural channel forms and functions, where possible. This will reduce the depth of flooding and improving the efficiency of the newly replaced culverts.

Natural material and softer engineering approaches will be used to restore modified channel and floodplain areas. This may include riparian zone plantings, vegetated stone revetments, live staking or brush layering. There will be limited use of hard engineering methods (i.e. armourstone walls). The softer engineering methods will provide for reduce bank and soil erosion while also providing an overall improvement on fish habitat, improved ecological quality to the watercourse.

Consultation

How can you be heard?

As part the project process, we are collecting feedback from the community to ensure the project is meeting the community's needs. We encourage you to provide your feedback and ask any questions you may have through the Questions and Comments section found at the bottom of this page. Your feedback is valuable in ensuring the proposed Curtis Creek Channel improvement project meets the needs of the community. We value your feedback and we will review and consider all input we receive. Please note that changes to the project based on community input will only be made where deemed feasible by the project team.

This page presents conceptual designs to the public and to receive feedback from the interested stakeholders and landowners throughout the study area prior to advancing to developing detailed design plans. No construction works will be completed until necessary feedback and permissions are received from private and public landowners

All impacted residents will be consulted on an individual basis as designs are finalized. Several parties have already been approached as part of the ongoing works including the following:

  • Local residents
  • Curve Lake First Nation
  • Hiawatha First Nation
  • Otonabee Region Conservation Authority.

The sites

The project has been divided into four (4) separate sites and their proposed works are described below:

Site 1: Upstream and Downstream of Armour Road Culvert

Proposed works:

  • Reinforce toe of stone lined wall along 617 Armour Road by placing additional stone with plantings
  • Minor channel regrading to increase conveyance capacity of watercourse between 607 and 617 Armour Road
  • Removal of armourstone upstream (east) of Armour Road to increase conveyance capacity and improve fish habitat by incorporating a vegetated boulder revetment

Site 2: Upstream and Downstream of Caddy Street Culvert Crossing

Proposed works:

  • Removal of armourstone wall downstream (south) of Caddy Street and replacing with vegetated boulder revetment to provide greener bank treatment and to increase conveyance capacity of the watercourse and culvert
  • Minor channel regrading to increase conveyance capacity of watercourse both upstream (north) and downstream (south) of Caddy Street
  • Removal of berm and lowering of existing manhole to provide improved floodplain access

Site 3: Downstream of Euclid Avenue

Proposed works:

  • Remove armourstone wall downstream (south) of Euclid Avenue and realign watercourse to improve the hydraulic efficiency of the new curvet and better utilize flood storage in the park
  • Take advantage of the channel realignment to build sidewalk along southern edge of Euclid Avenue and provide public access to the area.
  • Restore newly aligned channel with vegetated boulder revetment to provide greener bank treatment and improve aquatic habitat
  • Construct pocket wetland at storm sewer outfall location to enhance water quality treatment of storm sewer discharge

Site 4: Slope Stabilization

Site 4 involves making improvements to the slopes in the area of the creek.

Two (2) design alternatives have been presented to stabilize the valley lands, both include reinforcing the valley lands using both soft and hard engineering principles:

  • Concept 1: Terraslope Reinforced Slope – via geogrid and vegetated valley lands
  • Concept 2: Retaining wall and gradual slope along the top of lands

The ultimate decision will be based on consultation with the private landowners, First Nations and interested stakeholders.

Next steps

All input and feedback will be reviewed and considered by the project team, and incorporated into the detailed design if possible. All future project progress updates will also be posted to this page, including project timing and construction schedule.

Project overview

The proposed project includes a review of the entire natural channel system throughout Curtis Creek from the Trent Canal to Tivey Street. Flood reduction and natural channel improvements will be designed where measurable flood reduction and channel erosion control benefits can be implemented. Curtis Creek through the project area traverses through a number of private residential lots and public lands.

The proposed works have been designed to reduce flooding by modifying portions of the channel and providing an appropriate low flow channel throughout the system. Flooding occurs when stream flows present a hazard by coming in contact with private or publicly owned buildings and infrastructure. It should be noted that while the proposed works will significantly reduce flooding during the majority of rainfall events, overflowing of stream banks will still occur during intense storms.

The recommended works will incorporate the principles of natural channel design by better utilizing floodplain storage on public land, and natural channel forms and functions, where possible. This will reduce the depth of flooding and improving the efficiency of the newly replaced culverts.

Natural material and softer engineering approaches will be used to restore modified channel and floodplain areas. This may include riparian zone plantings, vegetated stone revetments, live staking or brush layering. There will be limited use of hard engineering methods (i.e. armourstone walls). The softer engineering methods will provide for reduce bank and soil erosion while also providing an overall improvement on fish habitat, improved ecological quality to the watercourse.

Consultation

How can you be heard?

As part the project process, we are collecting feedback from the community to ensure the project is meeting the community's needs. We encourage you to provide your feedback and ask any questions you may have through the Questions and Comments section found at the bottom of this page. Your feedback is valuable in ensuring the proposed Curtis Creek Channel improvement project meets the needs of the community. We value your feedback and we will review and consider all input we receive. Please note that changes to the project based on community input will only be made where deemed feasible by the project team.

This page presents conceptual designs to the public and to receive feedback from the interested stakeholders and landowners throughout the study area prior to advancing to developing detailed design plans. No construction works will be completed until necessary feedback and permissions are received from private and public landowners

All impacted residents will be consulted on an individual basis as designs are finalized. Several parties have already been approached as part of the ongoing works including the following:

  • Local residents
  • Curve Lake First Nation
  • Hiawatha First Nation
  • Otonabee Region Conservation Authority.

The sites

The project has been divided into four (4) separate sites and their proposed works are described below:

Site 1: Upstream and Downstream of Armour Road Culvert

Proposed works:

  • Reinforce toe of stone lined wall along 617 Armour Road by placing additional stone with plantings
  • Minor channel regrading to increase conveyance capacity of watercourse between 607 and 617 Armour Road
  • Removal of armourstone upstream (east) of Armour Road to increase conveyance capacity and improve fish habitat by incorporating a vegetated boulder revetment

Site 2: Upstream and Downstream of Caddy Street Culvert Crossing

Proposed works:

  • Removal of armourstone wall downstream (south) of Caddy Street and replacing with vegetated boulder revetment to provide greener bank treatment and to increase conveyance capacity of the watercourse and culvert
  • Minor channel regrading to increase conveyance capacity of watercourse both upstream (north) and downstream (south) of Caddy Street
  • Removal of berm and lowering of existing manhole to provide improved floodplain access

Site 3: Downstream of Euclid Avenue

Proposed works:

  • Remove armourstone wall downstream (south) of Euclid Avenue and realign watercourse to improve the hydraulic efficiency of the new curvet and better utilize flood storage in the park
  • Take advantage of the channel realignment to build sidewalk along southern edge of Euclid Avenue and provide public access to the area.
  • Restore newly aligned channel with vegetated boulder revetment to provide greener bank treatment and improve aquatic habitat
  • Construct pocket wetland at storm sewer outfall location to enhance water quality treatment of storm sewer discharge

Site 4: Slope Stabilization

Site 4 involves making improvements to the slopes in the area of the creek.

Two (2) design alternatives have been presented to stabilize the valley lands, both include reinforcing the valley lands using both soft and hard engineering principles:

  • Concept 1: Terraslope Reinforced Slope – via geogrid and vegetated valley lands
  • Concept 2: Retaining wall and gradual slope along the top of lands

The ultimate decision will be based on consultation with the private landowners, First Nations and interested stakeholders.

Next steps

All input and feedback will be reviewed and considered by the project team, and incorporated into the detailed design if possible. All future project progress updates will also be posted to this page, including project timing and construction schedule.

  • Background

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    In 2010 the City of Peterborough (the City) undertook a Curtis Creek Flood Reduction Master Plan Class Environmental Assessment (EA). The EA was prepared in response to a severe rainfall event in July 2004 that resulted in over $87 million in reported private property damages, and $25 million in infrastructure damages. The Class EA’s goal was to identify flood mitigation strategies to reduce flooding throughout the Curtis Creek Watershed.

    The Class EA identified several flood mitigation strategies, primarily culvert improvements and storm sewer upgrades. The Class EA concluded that the following four (4) culverts required upgrades to undersized culverts throughout the study area:

    • Rogers Street / Tivey Street Outlet
    • Armour Road Culvert Replacement
    • Caddy Street Culvert Replacement
    • Euclid Avenue Culvert Replacement

    Greck and Associates Limited (Greck) was retained by the Otonabee Region Conservation Authority (ORCA) to update flood hazard mapping for Curtis Creek, while also providing further analyses to size the above four culverts. The City has since replaced the above four culverts providing substantial flood relief within the project area.

    The Class EA also recommended several stream corridor enhancements, as the Curtis Creek downstream of Euclid Avenue was noted to be in poor condition, and such stream corridor improvements can further enhance the culverts performance. Greck and Associates Limited (Greck) was retained by the City of Peterborough to examine and design stream corridor enhancements.

  • Environmental Assessment

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    An environmental investigation is currently being completed to determine the following:

    • Review overall ecological conditions throughout the site limits (completed)
    • Complete tree inventory of all trees within the project site limits (completed)
    • Install water temperature loggers to provide long term temperature data to help establish fisheries habitat (ongoing)
    • Complete fish inventory to determine fish species present within site limits (scheduled for end of October)
  • Geotechnical Investigation

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    A geotechnical investigation is currently being completed via soil sampling, boreholes, laboratory testing to determine soil conditions, and slope stability. All field investigations were completed in September 2021, with all analyses and reporting ongoing and are anticipated to be completed in November 2021.

  • Archaeological Assessment

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    The project site is noted to have the potential for indigenous material, and as such a Stage 1 and 2 Archaeological Assessment was completed. The archaeological assessment was completed on July 20 and 21, 2021 by completing a test pit survey to investigate the potential for any archaeological material. First Nations were consulted throughout the process and were present during the test pit survey. The test pit survey concluded that the area is considered to be free of archaeological material and that no additional archeological assessments are recommended.

    None of the proposed channel works are expected to have no impact to any archaeological features.

Page last updated: 23 October 2021, 06:11