In a recent episode of Power Perspectives, the Energy Central podcast exploring the challenges and innovations shaping today’s grid, Otto Lynch, VP, Head of Power Line Systems at Bentley Systems joins the conversation to unpack one of the industry’s most underestimated risks: vegetation management. With decades of experience in transmission and distribution line engineering and the leading voice behind Power Line Systems (PLS), Otto brings a practical, engineering-first perspective to a topic often treated as routine maintenance.
His message is clear: Vegetation management is no longer just about trimming trees. It’s about ensuring grid safety and reliability under real operating conditions.
Why Utility Vegetation Management Needs Real-World Line Modeling
Utilities have traditionally relied on “blue sky” assessments, measuring conductor positions under calm, ideal conditions. But overhead lines don’t operate in ideal conditions.
Modern electrification is pushing conductors to higher temperatures than ever before. Lines once designed for around 120°F are now operating up to 300°F to meet growing demand.
The result is significant conductor sag. In some cases, a span can increase in sag by more than 15 feet between construction conditions and peak operation.
Layer in additional variables, and the challenge becomes even more complex:
- Wind causes horizontal blowout and added tension
- Ice loading increases vertical sag
- Structure deflection shifts conductor position further
- Combined conditions push wires beyond expected envelopes
When utilities assume conductors remain static, they risk underestimating clearance issues, creating potential for outages, compliance violations, and wildfire ignition.
Modeling Conductor Sag, Blowout, and Clearance Risk
The reality is simple: vegetation management cannot be accurate without understanding how conductors move.
Industry standards already require this level of rigor, accounting for factors like temperature, wind, and structural behavior. Yet many utilities still rely on simplified methods that don’t fully capture real-world conditions.
An engineering-based approach closes this gap by modeling the full conductor movement envelope ensuring clearances are evaluated against how the line actually behaves, not how it appears on a calm day.
How Selective Vegetation Management Reduces Cost and Risk
When risk increases, the instinct is often to clear more vegetation. But as Otto highlights, aggressive “scorched earth” clearing is not only inefficient, it doesn’t guarantee safety.
Because conductor movement varies along a span, vegetation risk is not uniform. Mid-span conditions differ significantly from areas near structures, where movement is more constrained.
This opens the door to selective vegetation management which targets trimming efforts where the risk is real and measurable.
The impact is meaningful:
- Lower costs by avoiding unnecessary clearing
- Improved public trust by minimizing environmental impact
- Better outcomes by focusing on true risk areas
>This approach aligns engineering insight with operational efficiency helping utilities do less, but achieve more.
Using LiDAR, PLS-CADD, and PLS-GRID for Vegetation Planning
To modernize vegetation management, utilities must rethink how they assess and manage risk. Static inspections are no longer enough.
By combining LiDAR data with advanced modeling tools like PLS-CADD and enterprise access through PLS-GRID, utilities can:
- Capture accurate, as-built conditions
- Simulate conductor behavior across operating scenarios
- Identify true clearance violations
- Optimize vegetation work planning
The result is a more proactive, data-driven program. One that reduces risk while improving efficiency and compliance.
Watch: Your Vegetation Program is Cutting the Wrong Trees
Vegetation management is no longer just about maintenance, it’s about safeguarding the grid under real-world conditions.
Watch the full Power Perspectives podcast with Otto Lynch to learn how utilities can take a smarter, engineering-driven approach to vegetation management.
