Can drones spray herbicide on power-line and pipeline rights-of-way?

Yes — and utilities are already buying it. ComEd's drone herbicide program with Davey Resource Group treated a 2-acre brush site in 45 minutes versus about 2 days for a ground crew, using a fraction of the herbicide, and is expanding across 65,000 acres of right-of-way. Drones reach steep, wet, or remote corridor segments a bucket truck can't, and can work at brush height under energized lines where a helicopter can't fly.

Is herbicide really cheaper than mowing a right-of-way?

Yes, and that's the whole industry sales pitch. A landmark analysis across 18 utilities found integrated vegetation management with herbicides costs roughly half as much as repeated mechanical mowing over 20 years, and railroads report mowing at 3–4 times the cost of herbicide treatment. Drones extend that savings into the corridor segments crews and trucks can't cheaply reach.

What does a farm operator need to add for right-of-way work?

The FAA authorizations carry straight over — Part 137 covers dispensing pesticide over any land. The new requirement is a state commercial applicator license with the Right-of-Way category (federally framed as Category 6); some states also require an aerial category. Then comes the business side: utility contractor prequalification (ISNetworld, Avetta, or Veriforce) and a step up in insurance, commonly $2 million general liability with a $5–10 million umbrella for transmission work.

Right-of-Way Drone Spraying: Utility, Pipeline & Roadside Vegetation

By Ag Drone Sprayers Editorial Team · Updated July 9, 2026

Utility vegetation management is a bigger business than most farmers realize — a U.S. market north of $9 billion a year, spent keeping brush off power lines, pipelines, railroads, and roadsides. It’s also full of ground a bucket truck can’t reach and a helicopter can’t fly under, which is exactly why utilities have started hiring drone applicators. If you already spray row crops, right-of-way work is the clearest path to filling your off-season. Here’s the market, the rules, and the entry path.

The work and who buys it

Electric transmission & distribution. The anchor market — selective brush foliar to keep tall-growing woody stems out of the wires, plus bare-ground residual around substations. One utility, ComEd, manages 65,000 acres of right-of-way alone.
Pipelines & railroads. Corridors must stay clear for patrol and safety; one rail contractor herbicide-treats about 40,000 track-miles a year across 30-plus states.
Roadsides, solar farms & industrial sites. Roadside herbicide runs a fraction of the cost of mowing; solar O&M and bare-ground work around tank farms and rail yards round it out.

Who hires: investor-owned utilities, the 900-plus electric co-ops, municipal utilities, pipeline operators, Class I railroads, state DOTs and county road departments, and solar operators — usually through vegetation management prime contractors. The big primes are already the ones posting “herbicide spray drone pilot” jobs, so subcontracting to them is a real front door.

Why drones win here — and where they don’t

The flagship proof is ComEd’s program with Davey Resource Group: a GPS-guided spray drone cleared a two-acre brush site in 45 minutes against roughly two days for a ground crew, using about 0.75 gallons of mix versus eight — and the utility reports cutting cost and time by more than half while reducing worker risk. Drones reach steep, wet, and remote corridor segments without soil compaction or truck access, and they can maneuver at brush height beneath and beside conductors where a manned helicopter can’t. There’s a public-relations edge, too: after landowner complaints have forced utilities to pause blanket helicopter spraying, GPS-fenced drone spot-treatment is the lower-friction alternative.

Be honest about the constraints. Many aerial herbicide labels prohibit ultra-low carrier volumes, and right-of-way foliar work often specifies higher volumes than an ag drone typically flies — that means slower passes and less throughput. High-volume dormant-stem broadcast is a poor drone fit. Helicopters keep the throughput crown on long contiguous corridors, and mechanical mowing still has to knock down tall, dense regrowth before any spray program starts. The drone’s lane is the access-limited, spot-treatment, and sensitive-area work — a large lane, but not the whole corridor.

The rules and the procurement hurdle

On the FAA side, nothing changes: Part 137 covers a drone dispensing pesticide over any land, so your Part 107 / 137 / Section 44807 stack carries straight over. The new license is a state commercial applicator credential with the Right-of-Way category (federally framed as Category 6, covering roadsides, utility lines, pipelines, and railways); some states, like Pennsylvania, also require an aerial category on top. There is no special FAA rule for flying near power lines — but electromagnetic interference near high-voltage lines can disrupt control, and a downed drone in the lines must be retrieved only by the utility.

The real barrier is procurement. Large utilities and pipelines prequalify contractors through platforms like ISNetworld, Avetta, or Veriforce, and set insurance floors around $2 million general liability with a $5–10 million umbrella for transmission work. Budget real time and money to get procurable — or start with the co-ops, municipal utilities, county road departments, and solar operators that skip the heaviest prequalification machinery.

For operators: the off-season dividend

The strategic case for a farm operator is the calendar. Right-of-way work runs the shoulders of the crop season — early-spring bare-ground pre-emergents before planting, post-harvest fall foliar, and dormant-stem programs from leaf-drop through early spring. It’s revenue in the months your ag drone would otherwise sit idle, and unlike a single-crop region, the utility, pipeline, and roadside market exists in every state. Add the Right-of-Way category, learn the brush chemistry (triclopyr, aminopyralid mixes, bare-ground residuals), get procurable, and you’ve turned a seasonal ag business into a year-round one.

Looking for a drone operator for right-of-way, roadside, or industrial vegetation work? Tell us your area and we'll match operators who cover it.

Find right-of-way drone operators

Sources

Frequently asked questions

Can drones spray herbicide on power-line and pipeline rights-of-way?: Yes — and utilities are already buying it. ComEd's drone herbicide program with Davey Resource Group treated a 2-acre brush site in 45 minutes versus about 2 days for a ground crew, using a fraction of the herbicide, and is expanding across 65,000 acres of right-of-way. Drones reach steep, wet, or remote corridor segments a bucket truck can't, and can work at brush height under energized lines where a helicopter can't fly.
Is herbicide really cheaper than mowing a right-of-way?: Yes, and that's the whole industry sales pitch. A landmark analysis across 18 utilities found integrated vegetation management with herbicides costs roughly half as much as repeated mechanical mowing over 20 years, and railroads report mowing at 3–4 times the cost of herbicide treatment. Drones extend that savings into the corridor segments crews and trucks can't cheaply reach.
What does a farm operator need to add for right-of-way work?: The FAA authorizations carry straight over — Part 137 covers dispensing pesticide over any land. The new requirement is a state commercial applicator license with the Right-of-Way category (federally framed as Category 6); some states also require an aerial category. Then comes the business side: utility contractor prequalification (ISNetworld, Avetta, or Veriforce) and a step up in insurance, commonly $2 million general liability with a $5–10 million umbrella for transmission work.
Why is right-of-way work valuable for a farm drone operator?: It fills the off-season. Right-of-way work runs both shoulders of the crop calendar — early-spring bare-ground pre-emergents before the planting rush, post-harvest fall foliar, and dormant-stem programs from leaf-drop through early spring. It's revenue in the months an ag-only drone would otherwise sit idle, in a U.S. utility vegetation market worth over $9 billion a year.