transmission-line-technical-specifications

Easement Width Calculations

Voltage-based corridor width requirements accounting for safety clearances and operational needs.

Standard easement widths by voltage:

• 69kV: 20-25m total width (10-12.5m each side of centerline)
• 115kV: 30-35m total width (15-17.5m each side)
• 230kV: 45-55m total width (22.5-27.5m each side)
• 500kV: 75-90m total width (37.5-45m each side)

Width components:

1. Conductor swing: Horizontal displacement during high winds
2. Safety clearance: NESC Table 232 minimum approach distances
3. Maintenance access: Space for bucket trucks, equipment
4. Future expansion: Reserve for additional circuits