Tree Near Power Lines: What to Do and Who to Call in Boise

You Look Up After a Storm, and a Branch Is Sitting on the Wire

It’s 6:30 a.m. A March windstorm just ripped through the North End. You step outside with your coffee and see it: a thick cottonwood limb draped across the power line running to your house. The line is sagging. Maybe sparking. Your gut says grab the chainsaw and deal with it.

Do not do that.

Every year in Idaho, homeowners get seriously injured, or killed, trying to handle trees near electrical wires on their own. The instinct to fix the problem fast is understandable. But when a tree is touching power lines, the stakes are literally life and death.

This guide walks you through exactly what to do when you find a tree growing into power lines in Boise. You’ll learn who handles what, when to call Idaho Power, when to call a certified arborist, and how to prevent this from happening again. If you’re staring at a branch on a wire right now, start with the next section.

Stop. Back Up. Call, Don’t Touch.

This is the only section that matters if you’re dealing with an active emergency.

A tree touching a power line can energize the entire tree. The trunk, the roots, the ground around it; all of it can carry lethal voltage. You cannot see whether current is flowing. You cannot tell by looking whether a line is “live” or “dead.” Assume every downed or sagging wire is energized at all times.

Here’s your immediate action checklist:

• Stay at least 35 feet away from any downed line or tree in contact with a wire
• Do not touch the tree, even with a wooden pole, rope, or rubber-handled tool. None of these are reliable insulators at distribution voltage.
• Keep children and pets inside
• Do not drive over a downed wire. If a wire falls on your car, stay inside and call 911.
• Call Idaho Power at (208) 388-2323 to report the situation
• Call 911 if the line is sparking, on fire, or someone has been injured

If you’re dealing with an emergency right now, call our 24/7 team at Boise Tree Pros: (208) 555-0192. We can coordinate with Idaho Power and handle the tree once the line is de-energized.

That’s it. That’s the whole plan for an active emergency. Don’t freelance it.

A Story About Why This Matters

A few years back, a homeowner in Southeast Boise noticed a branch from his silver maple resting on the service drop, the lower-voltage line running from the pole to his house. He figured it was “just the house wire” and climbed a ladder with a handsaw to cut it free.

The branch shifted when he cut it. His forearm brushed the service drop. Even at 240 volts (a fraction of what the main lines carry), the shock threw him off the ladder. He survived with second-degree burns on his arm and a fractured wrist from the fall. His wife found him on the ground.

He told the responding firefighters he didn’t think the house line was dangerous. It is. A 240-volt service drop carries more than enough current to kill. The main distribution lines running pole to pole? Those carry 7,200 volts or more. Contact with those is almost always fatal.

No branch is worth your life.

Service Drops vs. Distribution Lines: Know the Difference

Understanding which wire is which determines who you call and how urgent the situation is.

Distribution Lines (Pole to Pole)

These are the high-voltage main lines running along the top of utility poles. They carry 7,200 to 12,500 volts in most Boise neighborhoods. You’ll recognize them because:

• They sit at the top of the pole, usually on crossarms
• They are uninsulated: bare metal wire
• There are typically three wires running parallel
• They connect pole to pole down the street

These are Idaho Power’s responsibility. Always. No exceptions. If a tree is touching or growing into distribution lines, call Idaho Power at (208) 388-2323. Do not attempt to trim, prune, or remove any vegetation near these wires.

Service Drops (Pole to House)

These are the lower-voltage lines running from the utility pole to your home’s weatherhead, the connection point on your roof or exterior wall. They typically carry 120/240 volts. You’ll recognize them because:

• They run at an angle from the pole down to your house
• They are usually insulated (coated in black rubber)
• There is typically one bundled cable (called a triplex)
• They connect to a mast or bracket on your roof

These are the homeowner’s responsibility in most cases. Idaho Power owns the wire, but maintaining clearance around it falls to you. This is where a certified arborist comes in, but not just any arborist.

The Gray Area

Sometimes it’s hard to tell which wire a tree is affecting, especially when branches are tangled in multiple lines. When in doubt, call Idaho Power first. They will assess the situation at no charge and tell you whether it’s their responsibility or yours.

Idaho Power’s Vegetation Management Program: What They Will and Won’t Do

Idaho Power runs an active vegetation management program to keep trees clear of their distribution lines across their service territory. Here’s what that means for Boise homeowners.

What Idaho Power Will Do

• Trim trees away from distribution lines on a rotating cycle (typically every three to five years per area)
• Respond to emergency calls about trees on or near main power lines, 24 hours a day, seven days a week
• Remove hazard trees that pose an imminent threat to distribution infrastructure
• Assess trees for free when you report a concern about vegetation near their lines
• Coordinate with property owners before trimming on private property (they’ll notify you in advance during routine cycles)

What Idaho Power Won’t Do

• Trim around service drops. That’s on you.
• Remove stumps after they’ve cut a hazard tree
• Perform cosmetic pruning. They trim for clearance, not aesthetics, and the result often isn’t pretty.
• Plant replacement trees, though they offer guidance on appropriate species
• Trim trees that aren’t near their lines, even if the tree is clearly a future problem

Idaho Power’s crews follow ANSI A300 pruning standards, but their priority is line clearance, not your tree’s health or appearance. Directional pruning near power lines often leaves trees lopsided. If you want to maintain both clearance and a healthy canopy, proactive work with a qualified arborist is the better path.

How to Report a Tree Near Power Lines to Idaho Power

1. Call (208) 388-2323 (available 24/7 for emergencies)
2. Use Idaho Power’s online reporting tool at idahopower.com
3. Provide the pole number if you can read it (stamped on a metal tag on the pole)
4. Describe which wires the tree is affecting: top (distribution) or angled to a house (service drop)

For non-emergency situations, Idaho Power typically responds within five to ten business days.

When to Call an Arborist, and Why Credentials Matter

If Idaho Power confirms the issue is with your service drop, or if you want proactive pruning to prevent future problems, you need an arborist. But you need a specific kind.

Line Clearance Arborists: A Different Breed

A line clearance arborist is a tree care professional with specialized training to work near energized electrical conductors. This isn’t an optional certification. It’s an OSHA requirement (29 CFR 1910.269).

Here’s what sets them apart:

• Minimum approach distances: Line clearance arborists are trained to maintain specific distances from energized conductors based on voltage, distances that regular tree workers aren’t qualified to judge
• Specialized equipment: Insulated tools, insulated bucket trucks, grounding procedures, and personal protective equipment rated for electrical work
• OSHA compliance: Federal law requires that only qualified line clearance workers or line clearance trainees operate within ten feet of energized conductors carrying 50 kV or less
• ISA certification: Reputable line clearance arborists hold credentials from the International Society of Arboriculture, ensuring they understand tree biology as well as electrical safety

A regular tree service, no matter how experienced, cannot legally work within ten feet of an energized power line. If a company tells you otherwise, that’s a red flag. Walk away.

At Boise Tree Pros, our line clearance team holds both ISA credentials and OSHA-compliant electrical safety training. When you need tree trimming near power lines or tree removal near electrical infrastructure, we coordinate directly with Idaho Power to de-energize lines when necessary.

When to Call Us

• A tree or branch is contacting your service drop
• You want proactive pruning to prevent future line contact
• Idaho Power trimmed for clearance and the tree now needs corrective pruning for health
• You need a tree removed that’s growing under or near power lines
• You want a risk assessment for trees in your utility easement

Ready to get a line clearance arborist on-site? Contact Boise Tree Pros or call (208) 555-0192 for a free assessment.

The Worst Offenders: Tree Species That Cause Power Line Problems in Boise

Not every tree in Boise causes power line headaches. But some species are practically engineered for it. If you have any of these near your lines, you should be planning ahead, not waiting for the next windstorm.

Cottonwood (Populus spp.)

The undisputed champion of power line disasters in the Treasure Valley. Cottonwoods grow fast (three to five feet per year), reaching 80 to 100 feet at maturity. Their wood is brittle. Their branches snap in moderate wind. And their aggressive root systems cause a whole separate category of problems.

The Warm Springs Avenue story: After a severe November windstorm a few years ago, a stretch of a Boise neighborhood lost power for three full days. The cause? A row of mature cottonwoods along the street that hadn’t been pruned in over a decade. Multiple trees shed limbs simultaneously, bringing down distribution lines across four blocks. Idaho Power crews worked around the clock, but the tangled mess of heavy wood and downed conductors took 72 hours to clear. Residents in more than 120 homes went without heat in near-freezing temperatures. The HOA spent the following spring removing every cottonwood within 50 feet of the power lines, at a cost of over $40,000.

That bill would have been a fraction of the cost if those trees had been regularly maintained.

Silver Maple (Acer saccharinum)

The second-most common culprit. Silver maples grow fast, top out at 50 to 70 feet, and develop weak branch unions that split apart under wind, ice, or heavy snow load. They’re all over older Boise neighborhoods, planted decades ago when nobody thought about utility clearance.

American Elm (Ulmus americana) and Siberian Elm (Ulmus pumila)

Elms are tall, wide-canopied, and aggressive growers. Siberian elm in particular is practically invasive in the Boise area; it seeds prolifically, grows fast, and colonizes utility easements if you’re not paying attention. Once established near a power line, an elm requires regular trimming on a two- to three-year cycle to stay clear.

Other Problem Species

• Box elder (Acer negundo): weak wood, fast growth, prone to storm damage
• Black locust (Robinia pseudoacacia): tall, thorny, and hard to prune safely
• Tree of heaven (Ailanthus altissima): invasive, fast-growing, difficult to kill

Prevention: Planting the Right Tree in the Right Place

The cheapest, easiest way to deal with trees near power lines is to never plant the wrong tree there in the first place.

The 25-Foot Rule

Idaho Power and most utility companies follow a simple guideline:

• Within 25 feet of power lines: Plant only trees that reach a mature height of 25 feet or less
• 25 to 50 feet from power lines: Medium-height trees up to 40 feet at maturity
• 50+ feet from power lines: Plant whatever you want

Boise-Friendly Trees for Under Power Lines

These species thrive in Boise’s climate and stay short enough to coexist with overhead utilities:

• Amur maple (Acer ginnala): 15 to 20 feet, excellent fall color
• Chokecherry (Prunus virginiana): 20 to 25 feet, native to Idaho
• Japanese tree lilac (Syringa reticulata): 20 to 25 feet, fragrant blooms
• Crabapple varieties (Malus spp.): 15 to 25 feet depending on cultivar, spring flowers
• Hawthorn (Crataegus spp.): 15 to 25 feet, tough and drought-tolerant

Planting Distance Matters

Even a short tree can cause problems if it’s planted too close to a pole or guy wire. Follow these minimums:

• At least 15 feet from the nearest utility pole
• At least 20 feet from a transformer (those green boxes or pole-mounted cylinders)
• At least 25 feet from the main distribution line’s horizontal path
• Consider the mature canopy spread, not just height. A tree that’s 20 feet tall but 25 feet wide can still reach a service drop.

Check Your Utility Easement

Before you plant anything, know where your utility easement runs. Idaho Power holds easements on most residential properties in Boise, typically ten to 15 feet wide centered on the power line path. They have the legal right to trim or remove any vegetation within that easement, whether you like the result or not.

Your best move: plant outside the easement entirely. Your second-best move: plant approved low-growing species within it.

The Decision Tree: A Quick-Reference Guide

Use this when you’re standing in your yard trying to figure out who to call.

Is the tree touching or within ten feet of the HIGH lines (top of pole, pole to pole)?

• YES → Call Idaho Power: (208) 388-2323. Do not approach.
• NO → Continue.

Is the tree touching or within ten feet of the LOW line (pole to your house)?

• YES → Call a line clearance arborist. Do not attempt to trim yourself.
• NO → Continue.

Is the tree growing toward any power line and likely to reach it within one to two years?

• YES → Schedule proactive pruning with a qualified arborist.
• NO → Monitor annually. Consider the tree’s growth rate and mature size.

Is the tree a cottonwood, silver maple, or elm within 50 feet of power lines?

• YES → Get a risk assessment. These species are high-failure candidates.
• NO → Standard monitoring is fine.

For any of the above, contact Boise Tree Pros or call (208) 555-0192.

Frequently Asked Questions

Can I trim a tree near power lines myself?

No. Federal OSHA regulations prohibit unqualified persons from working within ten feet of energized power lines. Even for service drops carrying “only” 240 volts, the risk of electrocution is real and well-documented. Always hire a line clearance arborist for any trimming near electrical conductors. Attempting it yourself puts your life at risk and may also violate local codes.

Will Idaho Power trim trees on my property for free?

Idaho Power will trim trees that threaten their distribution lines (the high-voltage pole-to-pole wires) at no cost to you. They do this as part of their vegetation management program. However, they will not trim trees near your service drop (the line from the pole to your house) or perform pruning for aesthetic reasons. Service drop clearance is the homeowner’s responsibility.

How close can a tree be to power lines before it’s a problem?

Idaho Power maintains a minimum clearance of ten feet from distribution lines after trimming. For homeowners, any branch within ten feet of a power line (distribution or service drop) should be addressed. Trees growing toward lines at a rate of two or more feet per year (common with cottonwood and silver maple) should be pruned proactively or removed before they become an emergency.

What happens if my tree causes a power outage?

If your tree damages Idaho Power infrastructure, you may be liable for repair costs. Idaho Power’s tariff allows them to recover damages caused by customer-owned vegetation that wasn’t properly maintained. Beyond financial liability, a falling tree can cause outages affecting your entire neighborhood, and in winter, that’s a safety hazard for everyone. Proactive maintenance is always cheaper than emergency response and liability claims.

Who pays for tree removal near power lines?

It depends on the situation. If Idaho Power determines a tree is an imminent threat to their distribution lines, they may remove it at no cost. For service drop clearance or non-emergency removal, the homeowner pays. Tree removal near power lines typically costs more than standard removal due to the specialized equipment and line clearance certification required. Get a written estimate before work begins.

Don’t Wait for the Next Storm

Here’s the reality: Boise gets wind. Every year, every season. The foothills funnel gusts through the valley that snap limbs and topple weakened trees. If you’ve read this far, you probably have a tree (or a few) that you’ve been keeping an eye on.

Stop watching. Start acting.

The homeowner who waits until a branch is on the wire pays more, stresses more, and risks more than the one who calls for a proactive assessment in the spring. A certified arborist can evaluate your trees, identify which ones are headed for trouble, and create a pruning plan that keeps your property safe and your power on.

Here’s your next step: Call Boise Tree Pros at (208) 555-0192 or schedule a free assessment online. We’ll walk your property, identify every tree that’s a candidate for line conflict, and give you a clear, written plan, with pricing, before any work begins. If it turns out Idaho Power should handle it, we’ll tell you that too.

Your trees. Your power. Your call.