Parliament Hill / Supreme Court Escarpment Rehabilitation
In the early 1970s, the National Capital Commission (NCC) built a manicured shoreline and the Ottawa River multi-use pathway within the river's 100-year flood plain at the base of the Parliament Hill / Supreme Court escarpment. Since then, both the Ottawa River shoreline and pathway have been subject to floods of different volume and intensity. While the engineered shoreline and escarpment base have withstood flooding to an extent, the manicured shoreline and adjacent pathway were severely eroded and damaged by the flooding of 2017 and 2019. To address the damage and erosion caused by these major flooding events, the NCC repaired and reinforced the shoreline banks with a combination of riprap and vegetation that would better withstand flooding. The aim of the Parliament Hill / Supreme Court escarpment rehabilitation project is to restore, stabilize and revegetate the damaged area, and make it safer for users, as well as more resilient to climate change in terms of major flooding and rainfall events.
Prior to the 2017 flood, the Ottawa River shoreline and adjacent multi-use pathway at the base of the escarpment were meticulously maintained by the NCC and had considerable mature tree growth between the pathway and the escarpment. The 2017 and 2019 flooding adversely affected these areas of mature trees, which the NCC is also responsible for maintaining. The flood water remained for a considerable time and, as a result, the combined action of the standing water, waves and impact of water flow, both from the flooding and from the top of escarpment, contributed to considerable erosion and damage of shoreline segments, the asphalt pathway and the adjacent mature tree groupings at the escarpment base. The significant loss of mature trees between the pathway and the escarpment slope led to further deterioration of the shoreline area. The escarpment consists of limestone shale bedrock, covered with a variable thickness of topsoil and organic matter terraced with wood logs. The project entails collaboration with Public Services and Procurement Canada (PSPC), which is the owner of the escarpment slope where some project components will be undertaken. As the owner and manager of the multi-use pathway and manicured areas at the escarpment base, the NCC is the project leader.
Specifically, the Parliament Hill / Supreme Court escarpment rehabilitation project includes the following components:
- removal of inert human-made debris, rock, concrete and invasive species such as buckthorn and others
- removal of dead trees, protection of existing native trees and vegetation, and planting of native trees, seeding mixes, shrubs and perennials
- rehabilitation of approximately 650 m of damaged sections of the escarpment base, through various approaches to address the specific damage of each section, including installation of an erosion-resistant cover (consisting of topsoil, seeding and sodding mixes), toe improvements, construction of armour stone retaining walls, installation of riprap plus vegetation, rock face repairs, and a combination of these approaches in some sections
- installation of drainage gullies or other drainage devices to control runoff volume and speed from the top of escarpment
The Parliament Hill / Supreme Court escarpment is one of the character-defining elements of the Parliament Buildings National Historic Site of Canada, a designation from Parks Canada's Federal Heritage Buildings Review Office (FHBRO). According to the FHBRO heritage character statement, the prominent location, multiple viewscapes in all directions surrounding the site and a "wild" aesthetic are among the site's character-defining elements. The escarpment rehabilitation project is expected to re-create a lively shoreline that will provide the opportunity for interpretation and safe, enhanced public access to the site.
To prevent potential adverse effects on existing, abandoned and/or planned staircases from the base to the top of the escarpment (i.e. the creation of insurmountable or significant obstructions to future plans), the project will be closely coordinated with PSPC and other stakeholders identified throughout the project planning and implementation phases. Coordination with the Canadian Wildlife Service (CWS) of Environment and Climate Change Canada (ECCC) will also be required, as the CWS would need to issue a permit under the Species at Risk Act to remove and/or adversely affect six butternut trees, and ECCC will make a determination under the Impact Assessment Act to allow the project to proceed.
Disclaimer
This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.
Latest update
List all records
Contacts
National Capital CommissionEnvironmental Assessment
40 Elgin Street
Ottawa, Ontario K1P 5A8
Email: IA-EI@ncc-ccn.ca
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Location
- Ottawa (Ontario)
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Nature of Activity
- Other, not otherwise specified
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Assessment Status
In progress -
Start Date
2021-11-04 -
Proponent
The National Capital Commission -
Authorities
- National Capital Commission
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Assessment Type
Project on federal lands -
Reference Number
83139
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Canadian Nuclear Laboratories Intermediate Level Waste Storage Area
Chalk River Nuclear Laboratories Ltd., Chalk River, Ontario -
Canadian Nuclear Laboratories Cask Facility Project
Canadian Nuclear Laboratories, Chalk River, Ontario -
Canadian Nuclear Laboratories Covered Structure
Canadian Nuclear Laboratories, Chalk River, Ontario -
Canadian Nuclear Laboratories Office Trailer Expansion
Canadian Nuclear Laboratories, Chalk River, Ontario -
Canadian Nuclear Laboratories Upgraded Electrical Services
Chalk River Nuclear Laboratories Ltd., Chalk River, Ontario -
Canadian Nuclear Laboratories Contractor Management Trailer Complex
Canadian Nuclear Laboratories, Chalk River, Ontario -
Breaching Range Development in Areas 7 and 8, Range and Training Area, Garrison Petawawa
Range and Training Area, Garrison Petawawa (Area 8) -
Breaching Range Development in Areas 7 and 8, Range and Training Area, Garrison Petawawa
Range and Training Area, Garrison Petawawa (Area 7) -
Replace Culvert on Orange Road, Garrison Petawawa Range and Training Area
Range and Training Area of Garrison Petawawa -
Institutions of Bath and Millhaven: Sanitary Sewer Upgrades
Bath -
Partial removal of docks from the former Lachine marina
Lachine Marina -
Clinical Trial Material Facility at NRC Royalmount (Montréal, Québec)
6100 Royalmount Avenue (Montreal, QC) -
Construction of a roofed skating rink in
Orville Standup Memorial Park, Kahnawake -
Repair work on lock No. 5 of the Lachine Canal
Lachine Canal National Historic Site -
Supply and installation of a safety boom to prevent debris from entering the Lachine Canal water main.
Lachine Canal National Historic Site -
Resurfacing and Paving Exterior Roadways at Bath/Millhaven Institutions
Bath/Millhaven Institutions -
Bath Institution - New 96 Bed Living Unit
Bath -
HMP0005 - Honoré Mercier Bridge, Repairs to piers and mobile bearing cases, painting, and reinforcement of steel components, phase 3
Kahnawake -
Honoré-Mercier Bridge - Repairs on Pile 14A MTQ
Honoré-Mercier Bridge -
Montréal - Reparation of the St-Pierre interchange
Saint-Pierre Interchange -
Decontamination and Deconstruction of Blocks 6 and 7 at 600 Montée-Saint-François, Laval
Decontamination and Destruction of Blocks 6 and 7 at 600 Montée-Saint-François, Laval -
Rehabilitation of Algonquin Trail/OVRT
County of Renfrew -
Band Garage and Ecocenter
Kahnawake -
Refurbishment of the Senkus and LaSalle Coke Crane footbridges on the Lachine Canal path
Lachine Canal National Historic Site -
Repair of the Gauron-Lafleur bridges at the Lachine Canal
Lachine Canal -
Long Point (Amherst Island) Crib Repairs
Long Point (Amherst Island) Small Craft Harbour -
Napanee Generating Station Project
13 kilometres south of Napanee -
Rehabilitation of the Canal Bridge and replacement of spans 1 and 5
Lachine Canal National Historic Site -
Rehabilitation of spans 2, 3 and 4 of the Wellington train bridge
Lachine Canal National Historic Site -
Construction of a new office building
46 St-Jacques W. St. -
City of Sainte-Catherine - Repairs to the municipal wharf including reconstruction of the boat launching ramp
City of Sainte-Catherine -
Dismantling the Southeast and Southwest Esplanade footbridges
Lachine Canal National Historic Site -
Refurbishment of Lachine Canal - Spillway 2
Lachine Canal National Historic Site -
Refit and rehabilitation of the Lachine Canal workshops
Lachine Canal National Historic Site -
Rehabilitation of the Lachine Canal Weir 1
Lachine Canal National Historic Site -
Ogilvie Culvert Decommissioning
Port of Montreal -
Development of the green belt on Pierre-Dupuy Avenue by the Port of Montreal
Port of Montreal -
Shoreline stabilization at Cité du Havre, Port of Montreal
Port of Montreal -
Project to reinforce, clean, and paint the superstructure of the Jacques Cartier Bridge (JCP0057)
Montreal -
New unloading area for grain hopper trailers
Port of Montreal -
Expansion of shed 43, Laurier terminal - Port of Montreal
Port of Montreal -
Construction of screen embankments and a multifunctional area
Port of Montreal -
New Bridge for the St.Lawrence
Montreal -
Reinforcement of the caissons along berths 50 to 52 at the Port of Montreal
Port of Montreal -
Removal of obstructions to navigation at the berths of Montreal and Contrecoeur for the years 2021 - 2025
Port of Montreal -
Phase 5 of the dust collector replacement program at the Viterra grain terminal in the port of Montreal
Port of Montreal (Quebec) -
Victoria Bridge Rehabilitation Work
Victoria Bridge -
New additive tank for liquid bitumen
Port of Montreal -
Building Construction - Montreal Garrison
Montreal Garrison -
REINFORCEMENT OF CRANE RAILS FOUNDATIONS OF CAST TERMINAL AT PORT OF MONTREAL
Port of Montreal -
Installation of a new manifold for loading vessels (berth 96, port of Montreal)
Port of Montreal -
Pont La fontaine - Temporary structure for repairs on bridge P-01539H
Pont La Fontaine -
Stabilization of the slop - section 104 of the Port of Montreal
Port of Montreal -
Nuclear Power Demonstration Closure Project
Rolphton -
Mohawks of the Bay of Quinte - Elder and Disabled Care Home Construction
Mohawks of the Bay of Quinte First Nation -
Canadian Nuclear Laboratories Nuclear Power Demonstration Waste Facility: Modification to Crawl Space
Canadian Nuclear Laboratories, Nuclear Power Demonstration Waste Facility, Rolphton, Ontario -
Canadian Nuclear Laboratories, Nuclear Power Demonstration Waste Facility Modification to Building Crawl Space
Canadian Nuclear Laboratories, Nuclear Power Demonstration Waste Facility, Rolphton, Ontario -
YUL Montreal-Trudeau International Airport - Construction of an industrial building to produce nonwoven fabric for surgical masks
YUL Montreal-Trudeau International Airport -
Expansion of a Sterile Injectable Medication Manufacturing Plant Project
Boucherville -
YUL Montreal-Trudeau International Airport - Construction of a potable water pipe
YUL Montréal-Trudeau International Airport -
YUL Montreal-Trudeau International Airport - Work for the construction of taxiways connected to runway 24D-06G (North runway)
YUL Montréal-Trudeau International Airport -
YUL Montreal-Trudeau International Airport - Increase of the capacity of the baggage handling room
YUL Montreal-Trudeau International Airport -
YUL Montreal-Trudeau International Airport - Installation of a new gaz line as part of the boiler decentralization program
YUL Montréal-Trudeau International Airport -
YUL Montreal-Trudeau International Airport - Partial Demolition of the Parking Garage
YUL Montreal-Trudeau International Airport -
YUL Montreal-Trudeau International Airport - Removal of underground tank
YUL Montreal-Trudeau International Airport -
YUL Montreal-Trudeau International Airport - Petroleum Equipment Removal
YUL Montreal-Trudeau International Airport -
YUL Montreal-Trudeau International Airport - Construction of the Réseau express métropolitain (REM) station
YUL Montreal-Trudeau International Airport -
YUL Montreal-Trudeau International Airport - Preparatory work for the REM station
YUL Montreal-Trudeau International Airport -
YUL Montreal-Trudeau International Airport - Construction of an industrial building to produce nonwoven fabric for surgical masks
YUL Montreal-Trudeau International Airport -
YUL Montreal-Trudeau International Airport - Improvement of electrical and mechanical infrastructure at Bombardier's administrative centre located at 400 Côte-Vertu Blvd.
YUL Montreal-Trudeau International Airport -
YUL Montréal-Trudeau International Airport - Replacement of an electrical service entrance to supply power to an existing building
YUL Montreal-Trudeau International Airport -
Quinte Mohawk School - Asphalt Play Area rehabilitation
Mohawks of the Bay of Quinte First Nation -
Mohawks of the Bay of Quinte First Nation - Watermain Extension Phase III
Mohawks of the Bay of Quinte First Nation, Ontario -
Eastern Mainline Project
Belleville -
Reconstruction of a Section of York Road and Rehabilitation of the Mud Creek Bridge
Reconstruction of a Section of York Road and Rehabilitation of the Mud Creek Bridge -
YUL Montreal-Trudeau International Airport - Tank dismantling
YUL Montreal-Trudeau International Airport -
Restoration and redevelopment of the drainage network at the John H. Chapman Space Center in Saint-Hubert
Saint-Hubert -
Mohawks of the Bay of Quinte Remedial Action Plan
Parcel 5A/C -
Mohawks of the Bay of Quinte Remedial Action Plan
Parcel 1 -
Mohawks of the Bay of Quinte Remedial Action Plan
Parcel 10 -
Mohawks of the Bay of Quinte Remedial Action Plan
Parcel 12 -
Work to secure the walls of the central island of the Lachine Canal
Lachine Canal National Historic Site -
Drainage infrastructure improvements - Weirs, siphons and ditch
Chambly Canal National Historic Site -
Modernization of the Vanier Pavilion Facilities - Royal Military College Saint-Jean
Royal Military College Saint-Jean -
Fisheries Habitat Construction at Big Island Marsh
Trent-Severn Waterway National Historic Site -
Contrecoeur Port Terminal Expansion Project
Contrecoeur, 40 kilometres north-east of Montreal -
Retaining Wall Refurbishment - Royal Military College Saint-Jean
Royal Military College Saint-Jean -
Tree Removal, Phase 2 - Canadian Forces Detachment Mountain View
Canadian Forces Detachment Mountain View -
Surface water management, Yara Canada Terminal, Contrecoeur
Port of Montreal -
Stormwater management system
Port of Montreal -
Urgent Fuel Storage Tank Code Compliance
494 Dundas St E, Belleville, ON