Transmission Line Engineering & Design

Complete transmission line engineering services from early-stage feasibility through issued-for-construction (IFC) deliverables, covering voltage classes from 4 kV to 765 kV for both overhead and underground systems.

Overhead Services:
- PLS-CADD line modeling, structure spotting, and sag-tension analysis
- Plan and profile drawings, framing and assembly details
- Clearance studies (NESC, utility-specific criteria)
- Steel monopole, concrete pole, lattice tower, H-frame, and wood pole design
- Fabrication drawing reviews and vendor submittal evaluations
- Foundation design — drilled shafts, direct embed, vibratory caissons, helical piles, grillage
- OPGW/fiber design and coordination
- Stringing charts, damper recommendations, and bills of material
- FAA pre-screening evaluations and permit submittals
- Crossing permits
- EMF calculations
- Ampacity, surface gradient, audible noice, radio interference Calculations
- Lightning protection and grounding analysis
- Damper calculations and vibration analysis
- Construction staking and IFC packages

Underground Services:
- High pressure fluid filled (HPFF) cable design
- Horizontal directional drilling (HDD) coordination
- Underground-to-overhead transition and riser structure design
- Cable ampacity and thermal analysis
- Duct Banks and Vault Designs

Experience spans greenfield transmission builds, total line rebuilds, reconductoring (ACSR, ACSS, HTLS), DOT relocations, urban corridor relocations, double-circuit configurations, mountainous terrain, and constrained right-of-way solutions.