About Transmission Lines

We develop transmission lines from concept through construction with project experience in overhead (up to 765 kV) and underground projects (up to 345 kV).  Focusing on best practice and best cost options to deliver your project on time and on budget.

Planning, Analysis, & Investigation

Substation Siting

• Route reconnaissance and selection
• Coordination between utilities and agencies
• Environmental assessments
• Geotechnical analysis
• Creation of exhibits for meetings with client, agency, or stakeholder meetings and open houses

Conductor Studies

• Ratings
• Clearance evaluations
• Field effects (magnetic or electric) analysis
• Audible noise analysis
• Induction
• Interference
• Grounding

Structure Design Studies

• Structure material selection
• Grounding
• Vibration
• Lightning protection

Feasibility Studies/Probability of Cost Assessments

Overhead Transmission Line Design – Experience up to 500 kV DC & 765 kV AC
We’ve worked on new construction, rebuild, re-conductor, relocation, maintenance, and reliability projects using the PLS- CADD software suite for conductor clearance evaluations and structural designs.

• Conductor Design – experience with most conductor types (including composite core conductors), electrical clearance evaluations, and thermal ratings analysis
• OPGW/ADSS – new fiber additions or replacement type projects
• Structure Design – extensive experience with concrete, wood, steel, hybrid, or lattice towers
• Tower – experience with tower model creation based upon

LiDAR Survey Data

• Foundation Designs – anchor bolt, piers, piles, vibratory caissons, or direct embed
• DOT Relocation – markups for utility adjustment plans, utility coordination meetings, progress meeting attendance, line relocation design, and foreign utility coordination
• Customer Relocations – preparation of alternative designs and cost estimates, displays for presenting findings to customers, preparation of design, material ordering, cost estimating, and coordination during construction phase
• NERC assessment planning, remediation, and support
• Conditional Assessments – Stantec has the capability and experience in visually inspecting and structurally analyzing existing structures and foundations for new or existing conditions
• Extensive Storm Restoration – experience following major storms or disasters
• Avian preventative designs – experience with bird diverters, caps, insulation, spikes, nest relocation platforms

Underground Design – Experience up to 345 kV

• Performance of feasibility studies, overhead to underground conversion probability of cost estimates, and route selection
• New construction, upgrades, or relocation type designs
• Construction installations (e.g., concrete-encased duct bank, horizontal directional drill, etc.) and utilize CYMCAP software for cable ratings analysis
• Preparation of cost estimates (material and labor) for different routes, cable designs, or installation types
• Preparation of protection schemes for underground cables
• Grounding requirements and specifications

Construction Support

• Field review and coordination
• Material resolution
• As-built records

Additional Integrated Transmission Line Services

Our full suite of transmission line services means we provide fully integrated project services, all in-house. Our services include:

• Survey & Geomatics
• Environmental Assessments
• Permitting & Compliance
• Geotechnical
• Transportation Infrastructure
• Telecom
• Physical Security
• Civil engineering
• A/C Mitigation Design