Firm Description: T2 Utility Engineers Inc.

Specialized Utility Engineering Leadership: T2 Utility Engineers Inc. (T2) is a premier consultancy focused exclusively on Subsurface Utility Engineering (SUE) and utility coordination. In the context of the Cawthra Road improvements, T2 acts as the technical lead for identifying complex underground infrastructure, leveraging professional judgment and decades of experience to mitigate the inherent risks of "unknown" utilities during municipal construction.
ASCE 38-02 and CSA S250-11 Compliance: The firm’s methodology is rooted in strict adherence to the Construction Institute/American Society of Civil Engineers (CI/ASCE) Standard 38-02 and CSA S250-11. This professional standard provides a systematic framework for the collection and depiction of utility data, ensuring that the results provided to IBI Group and the Region of Peel are categorized by definitive "Quality Levels" (A through D).
Technology-Driven Diagnostics: T2 utilizes the latest technological advancements in geophysical prospecting. Their field technicians are trained in the deployment of single and multi-frequency electromagnetic (EM) designating equipment and Ground Penetrating Radar (GPR). This focus on precision allows for the identification of metallic and non-metallic utilities that traditional record-searching might overlook.
Integrated Survey and Mapping Expertise: Beyond simple location, T2 integrates high-accuracy survey technologies, including Global Positioning System (GPS) based equipment, to capture utility markers in real-time. This data is processed through sophisticated CAD and GIS systems to produce a composite utility plan that serves as the "source of truth" for project designers and engineers.
Uncertainty and Risk Mitigation: The primary value proposition of T2 Utility Engineers is the reduction of project uncertainty. By identifying mainline utilities and critical crossings early in the design phase, T2 helps prevent costly change orders, utility strikes, and construction delays. Their work is essential for the transition from the Environmental Assessment (EA) phase to detailed design.
Collaboration with Major Stakeholders: T2 operates as a strategic liaison between project proponents (like the Region of Peel and IBI Group) and utility owners. Their investigation involves extensive record request circulation to entities including Alectra, Enbridge, Bell, Rogers, and various municipal departments, ensuring all stakeholder interests are accounted for in the engineering record.
Project Area Adaptability: The firm demonstrates high adaptability in challenging urban environments. For the Cawthra Road project, T2 successfully navigated a 5.5-kilometre corridor characterized by a mix of high-density commercial zones at the north and residential boulevards at the south, maintaining data integrity across varying soil conductivities and utility congestion levels.
Commitment to Data Defensibility: Every report issued by T2 is a legal and technical document of record. The firm emphasizes the "professional judgment" of its staff, ensuring that if signals are distorted by environmental factors (like conductive structures or utility bleed-off), the limitations are clearly communicated to the client to prevent misinterpretation of the subsurface landscape.
Comprehensive Service Lifecycle: T2 offers a full spectrum of SUE services, from initial record research (Quality Level D) and visual site inspections (Quality Level C) to non-destructive geophysical mapping (Quality Level B) and precise vacuum excavation test holes (Quality Level A). This tiered approach allows clients to scale their investigation based on the risk profile of the project.
Market Reputation in Ontario: As a recognized leader in the Ontario engineering market, T2 is frequently retained for major regional infrastructure projects, including the Peel Regional Road improvements. Their Whitby and regional offices provide localized expertise in Ontario-specific utility regulations and municipal standards.

Scope of Services: Subsurface Utility Investigation

Phase 1: Project Initiation and Area Delineation: The scope of services initiated with a comprehensive review of the Cawthra Road (Peel RR17) corridor, spanning 5.5 kilometres from the Queen Elizabeth Way (QEW) to Eastgate Parkway. T2 established the project limits to include the full right-of-way (ROW), targeting both mainline utilities and all lateral crossings that could impact the proposed intersection improvements and road widening activities.
Phase 2: Comprehensive Utility Record Research (Quality Level D): T2 conducted an extensive "Record Request Circulation" process. This involved formal inquiries to all known utility owners within the Mississauga area. The team gathered and analyzed historical plan and profile drawings, as-built records, and schematic maps from Alectra Utilities, Hydro One, Enbridge Gas, Bell Canada, Rogers, and Cogeco. This phase established the baseline "Quality Level D" data, identifying the general existence of infrastructure based solely on historical documentation.
Phase 3: Topographic and Visual Verification (Quality Level C): Field crews performed a site-wide reconnaissance to correlate recorded data with visible surface features. This included surveying the locations of manholes, valve boxes, fire hydrants, utility poles, and pedestals. By professional interpretation, T2 upgraded the utility data to "Quality Level C," where the horizontal alignment is inferred based on the connection of visible surface appurtenances.
Phase 4: Geophysical Utility Designating (Quality Level B): The core of the technical scope involved "Utility Designating" using surface geophysical methods. T2 deployed high-performance electromagnetic (EM) designating equipment across the entire 5.5 km study area. Technicians utilized both active and passive signals to induce magnetic fields onto target lines, allowing for the horizontal positioning of conductive utilities. This non-destructive process provides "Quality Level B" data, which is essential for determining potential conflicts with new infrastructure.
Phase 5: Electromagnetic Signal Induction and Frequency Selection: Field technicians assessed the merits of different EM technologies based on site conditions. They utilized single-frequency transmitters for isolated lines and multi-frequency equipment for congested utility corridors where "bleed-off" was a risk. By adjusting frequencies, T2 was able to distinguish between closely spaced utilities, such as parallel telecommunications ducts and gas mains.
Phase 6: Passive Scanning and Induction Sweeps: To identify undocumented or "orphan" utilities not present in the record documents, T2 performed induction scanning in key intersections and high-risk areas. This passive sweep technique allows the equipment to detect magnetic fields generated by power lines or other energized conductors without a direct connection, providing an additional layer of security for the project design team.
Phase 7: High-Precision GPS Survey Integration: All designating marks placed on the ground by the SUE technicians were surveyed using Global Positioning System (GPS) technologies. The survey followed industry best practices for accuracy, ensuring that the field data was tied to the established project coordinate system. This step is critical for ensuring that the electronic utility maps align perfectly with the topographic and legal surveys used by road designers.
Phase 8: Utility Mapping and Quality Level Assignment: Following data collection, T2’s CAD department generated a Utility Composite Plan. Every utility segment in the drawing was assigned a Quality Level (A, B, C, or D) as defined by ASCE 38-02. This allows the design engineer to understand the reliability of the data—for example, distinguishing between a gas line located by EM (Quality Level B) and a sewer line plotted from an old record (Quality Level D).
Phase 9: Identification of Infrastructure Conflicts: The scope included a detailed analysis of underground utilities that may impact the project. T2 identified watermains (ranging from 300mm PVC to 750mm CCP), sanitary and storm sewers, high-pressure gas mains, and extensive fiber optic networks. The report highlights these potential "utility conflicts," providing the Region of Peel with the data needed to plan utility relocations before construction begins.
Phase 10: Analysis of Site Environmental Constraints: T2 evaluated the impact of environmental factors on the investigation. The scope included assessments of ground conductivity, material age (e.g., PVC pipes without tracer wires), and the presence of conductive structures like reinforcing bars or guard rails. Where signals were distorted, T2 documented these limitations to ensure the "professional judgment" applied was transparent to the end-user.
Phase 11: Coordination with IBI Group and Region of Peel: Throughout the investigation, T2 maintained continuous communication with IBI Group (the prime consultant) and the Region of Peel (the owner). This included progress reporting and the resolution of discrepancies between record data and field findings, ensuring that the SUE investigation evolved alongside the changing needs of the Cawthra Road Class EA study.
Phase 12: Documentation of Project Area Characteristics: The scope required a detailed description of the project environment, noting the 4-lane major arterial nature of Cawthra Road and the specific boulevard conditions (grass vs. concrete). This context is vital for future contractors who will rely on the SUE report to plan their excavation methods and equipment staging.
Phase 13: Technical Report Production: The final deliverable was a comprehensive Subsurface Utility Engineering Services Report. This document synthesizes the project summary, equipment descriptions, methodology, and field findings. It includes appendices for record documents and the final composite utility drawings, providing a "one-stop" reference for the subsurface environment of the project.
Phase 14: Quality Assurance and Professional Certification: The report underwent a rigorous QA/QC process. Senior engineering staff reviewed the data for consistency with ASCE 38-02 standards. The final report represents the "professional judgment" of T2 Utility Engineers, signifying that the investigation was completed using recognized industry standards for accuracy and reliability.
Phase 15: Support for Detailed Design and Conflict Matrix: While the Appendix L report is focused on the investigation, T2 provided the foundational data for a "Conflict Matrix." This matrix allows designers to prioritize the relocation of utilities that directly interfere with new drainage structures, light poles, or road widening, optimizing the project budget.
Phase 16: Future Test Hole Recommendations (Quality Level A): As part of the scope, T2 identified areas where "Quality Level A" (test holes) should be completed in the future. These recommendations focus on high-priority crossing points where vertical clearance is critical, providing a roadmap for the next phase of detailed engineering.

Technical Evaluation & Criteria

ASCE 38-02 Evaluation Standards

Reliability: Data categorized by Quality Levels (A, B, C, D).
Precision: GPS-surveyed designating marks.
Methodology: Use of EM designating and induction scanning.
Deliverables: Digital Utility Composite Plans.
Risk Management: Reduction of utility-related claims.

Contractual & Procurement Value

The value of SUE services is measured by the Return on Investment (ROI) via risk reduction. By identifying conflicts early, the Region of Peel mitigates costs associated with construction delays, utility repairs, and redesigns, which historically exceed the cost of the SUE investigation by 4:1 to 10:1.

Technical Callouts

SUE

Subsurface Utility Engineering. A branch of engineering that involves managing certain risks associated with utility mapping and coordination.

ASCE 38-02

The industry standard for collecting and depicting subsurface utility data, establishing four distinct Quality Levels (QL-A to QL-D).

Quality Level B (QL-B)

Utility information obtained through surface geophysical methods (like EM or GPR) to determine horizontal position.

GAYA CAPITAL

REPORT REF: APPENDIX L

Cawthra Road (RR17) Utility Infrastructure