Visit the Ontario Workplace Tribunals Library website to view a list of all accreditations granted since 1971.
Active Cases Before the Board:
2973-24-R - Crane Rental Association of Ontario and International Union of Operating Engineers, Local 793
- March 11, 2025 - Application from Crane Rental Association of Ontario (A-92)
- April 8, 2025 - Response A-93
- April 21, 2025 - Applicant Declaration A-95
- May 2, 2025 - Decision
- May 16, 2025 - Decision
- June 09, 2025 - Decision
- June 13, 2025 - Intervention – UCA
- June 13, 2025 - Intervention – OFA
- June 16, 2025 - Intervention – Frankfurt Investments
- June 16, 2025 - Decision
- June 20, 2025 - A-93 - Ontario Concrete & Drain Contractors Association
- June 20, 2025 - Intervention - OCDCA
Employer Filings:
- June 4, 2025 - Elite Crane Rental Inc.
- June 12, 2025 - OCP Construction Supplies
- June 16, 2025
- June 18, 2025 - Joe's Crane Services Inc.
- June 24, 2025 - Mainline Crane Rentals Inc.
- June 25, 2025
- June 26, 2025 - OCP Construction Supplies
- June 27, 2025
- June 30, 2025
- July 22, 2025 - Decision
- July 24, 2025 - Decision
- August 7, 2025 - Letter from Pumpcrete counsel
- August 8, 2025 - Letter from counsel for CRAO
- August 8, 2025 - Letter from CRAO counsel in response to July 22 decision from the Board
- August 8, 2025 - Letter from counsel for CRAO (consent from other parties)
- August 8, 2025 - Letter from counsel representing CRAO (response to Pumpcrete submission)
- August 8, 2025 - Response from counsel for Local 793 to Boards July 22 decision
- August 8, 2025 - Withdraw intervention of the Ontario Concrete & Drain Contractors Association
- August 11, 2025 - Ontario Formwork Association withdraws intervention
- August 11, 2025 - Frankfurt Investments (1985) Limited withdraws intervention
- August 11, 2025 - Utility Contractors’ Association of Ontario withdraws intervention
- August 15, 2025
- August 20, 2025 - Letter from Labourers Counsel – Oustanding issues
- August 22, 2025 - Letter from Local 793 counsel – Response to new allegations
- September 5, 2025 - Letter from CRAO counsel – request to convert mediation to Case Management Hearing
- September 8, 2025 - Letter from Pumpcrete & Aurora counsel – Oppose request to change mediation to CMH
- September 8, 2025 - Letter from counsel for CRAO in response to Pumpcrete opposing request for CMH
- September 10, 2025 - Letter from counsel for Pumpcrete in response to CRAO September 8 letter
- September 18, 2025 - Decision
- December 15, 2025 - Decision
- January 22, 2026 - Parties agree to one week extension – new deadlines
- February 2, 2026 - Labourers’ submissions re: standing
- February 6, 2025 - Counsel for Pumpcrete & Aurora Concrete – Right to Intrervene
- February 27, 2026 - Counsel for Operating Engineers – Right to Intervene
- February 27, 2026 - Counsel for CRAO – Right to Intervene
- March 13, 2026 - Counsel for Labourers – Response to right to Intervene
- June 15, 2026 - Decision
- July 31, 2026 - Request on consent to change deadline from July 31 to August 7
- August 7, 2026 - Submission in response to Boards June 16th decision
- September 1, 2026 - Documents to be relied on by representatives of Pumpcrete and Aurora
- September 9, 2026 - Applicant submissions regarding its no-prima-facie objections
- September 9, 2026 - Local 793 submissions regarding its no-prima-facie objections
- October 16, 2026 - Submission from counsel for Pumpcrete & Aurora – Response to Submissions to the “no prima facie” objections raised by Applicant and RP
- October 27, 2026 - Apprehension of bias from counsel on behalf of Interveners Pumpcrete and Aurora
There are currently no Project Agreement applications before the Board.
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1323-25-R - Application from Ontario Association of Demolition Contractors and The Labourers' International Union of North America, Ontario Provincial District Council and its affiliated Local Unions 183, 493, 506, 527, 607, 625, 837, 1036, 1059 and 1089
- August 1, 2025
- August 11, 2025 - Request from Operating Engineers, Local 793 for copies of all documents
- August 26, 2025 - Intervention from Local 793
- September 2, 2025 - Response from LIUNA A-93 – Schedule A & B
- September 4, 2025 - Ontario Association of Demolition Contractors List of Employers in proposed Unit & A95
- September 9, 2025 - Letter from counsel for the Ontario Association of Demolition Contractors opposing Local 793 intervention
- September 17, 2025 - Letter from counsel for Labourers
- September 19, 2025 - Letter from counsel for Local 793
- December 10, 2025 - Decision
- December 22, 2025 - Status of Local 793 in this matter
- February 2, 2026 - Decision
- February 3, 2026 - Ontario Association of Demolition Contractors – Retain Counsel
- March 23, 2026 - Letter from counsel for the Applicant to request the Board to amend Bargaining Unit
- March 25, 2026 - Letter from Counsel for Responding Party agreeing with proposed amendment from Applicant
- March 25, 2026 - Letter from Responding Party to amend Schedule A
- March 25, 2026 - Decision
- March 26, 2026 - Decision
- May 21, 2026 - Decision
- July 31, 2026 - Decision – Granted
1563-25-R - Personnel & Material Hoist Employers’ Association (PMHEA) and International Union of Operating Engineers, Local 793
- August 26, 2025 - Application A92
- September 3, 2025 - Counsel for Labourers’ International Union of North America – Request for documents
- September 3, 2025 - Request from LIUNA for production of documents
- September 24, 2025 - Response from Operating Engineers Local 793
- September 24, 2025 - Schedule A – Hoist Employers Association
- October 28, 2025 - Decision
- November 25, 2025 - Employer filing A-94
- February 18, 2026 - Decision
- February 23, 2026 - Decision
- February 23, 2026 - Applicant request to amend published notice to reflect March 17
- March 23, 2026 - Letter from applicant counsel to proceed with disposition of Application
- March 23, 2026 - Decision – Granted
2792-25-R - Ontario Concrete & Drain Contractors Association & Labourers International Union of North America, Local 183
Geographic Maps
Construction Industry Areas (lists)
Miscellaneous
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