Tree Risk Assessment in Salt Lake City, Utah

A tree risk assessment tells you whether a tree, or some part of it, is likely to come down and hurt someone or damage something.

That’s it. That’s the whole point of the service.

Diamond Tree Experts runs these using the International Society of Arboriculture (ISA) Best Management Practices framework, tied to ANSI A300 Part 9, so what you get isn’t one guy’s opinion based on a walk-around. It’s a documented process with a rating attached at the end.

We’ve been doing this on Wasatch Front trees since 1967.

Four ISA-certified arborists on staff right now. If a tree’s leaning, dropping limbs for no obvious reason, or just looks off in a way you can’t quite name, this is the service that gives you an actual answer instead of a shrug.

ISA Tree Risk Assessment Qualification (TRAQ) and What It Actually Covers

There are three levels to how ISA structures the TRAQ, and most people have no idea the levels exist until we explain it on-site.

Level 1 is limited visual. Arborist walks the property, eyes on the trees from the ground, flags whatever’s obviously wrong. Dead wood, a bad lean, a crack you can see from ten feet away. This usually happens as part of a broader property visit where the trees aren’t even the main reason we’re there.

Level 2 goes further, and it’s what most homeowners actually end up needing. We get in close. Check the root flare at the base, walk the crown from a few angles, sometimes sound the trunk with a mallet to listen for hollow spots that don’t show on the outside. Takes real time. Produces a written rating.

Level 3 is the deep-dive version. Resistance drilling, sometimes aerial work, occasionally tomography to map decay inside the trunk. Most residential trees never need this. It comes up when a Level 2 finding is unclear, or when whatever’s under the tree, a school entrance, a busy parking lot, is valuable enough that a rough guess isn’t good enough.

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Likelihood of Failure, Target Impact, and the ISA Risk Rating Matrix

After the fieldwork, all of it runs through a two-step rating system.

First matrix combines how likely the tree is to fail with how likely it is to hit something.

Second matrix takes that number and crosses it against how bad the damage would be if it did fail.

End result is one of four ratings: Low, Moderate, High, Extreme.

Wasatch Front Soil, Canyon Winds, and Why Utah Trees Fail Differently

Utah throws some specific problems into this that other regions don’t deal with the same way.

Alkaline clay soil covers most of the Salt Lake Valley, and it slows root development, which means anchoring is uneven, especially in older cottonwoods and silver maples that went into the ground decades ago along the Jordan River corridor and through neighborhoods like Sugar House, Rose Park, and Holladay.

Canyon wind events move fast and don’t give much warning. They go after trees with already-compromised roots first.

Then there’s the late-fall snow problem, wet and heavy, landing on trees that haven’t dropped their leaves yet. Branches snap under weight they were never built to hold.

We deal with this every single year, and almost every time, the failure traces back to something that could’ve been caught if someone had actually looked.

Cottonwoods, Silver Maples, Included Bark, and Other Local Defects

Species make a real difference too, and this is where a lot of generic tree advice falls apart.

Cottonwoods get enormous and the wood itself is brittle, which means branches can fail suddenly with basically zero warning signs beforehand.

Silver maples show up constantly in mid-century neighborhoods with co-dominant stems and included bark, a defect that’s structurally serious and completely invisible unless someone’s actually looking for it.

Austrian pines, planted heavily through the 70s and 80s, can be carrying bark beetle damage for a while before the canopy visibly thins out.

And, emerald ash borer is a real, current threat to ash trees across northern Utah right now, not a someday problem.

Tree Removal Services

Tree Removal

Tree Trimming

Stump Grinding

Mulch Products

Green Waste Dumping

Demolition

Common Mistakes Homeowners and HOAs Make With Hazard Trees

Now, mistakes.

The number one thing people get wrong is waiting until they can see a problem before calling anyone.

Root damage and internal decay frequently don’t show up above ground until the tree is already close to failing. Dieback in the canopy might mean the actual issue has been building for years underneath.

Second mistake, and this one’s sneaky: assuming a tree that made it through last winter’s storm is fine now. It isn’t necessarily.

A tree that partially failed once, lost a limb, lost a leader, is structurally different afterward. Different, not better. Often it’s more likely to fail again, not less, because whatever caused the first failure is usually still there.

Third one. People mix up a general estimate visit with an actual risk assessment.

If a crew shows up to quote you on trimming, that’s not the same thing as an ISA-trained arborist running a documented Level 2 evaluation and handing you a formal rating.

If you need something for insurance, for an HOA board, or because a tree already damaged something and there’s a legal question sitting on the table, you need the real assessment. A verbal “yeah that one looks fine” doesn’t hold up anywhere that matters.

Liability, Insurance Documentation, and What Happens If You Skip It

What happens if you skip it entirely? The defect doesn’t fix itself. It gets worse, quietly, and then it fails at the worst possible moment, usually during a wind event, under snow load, or after soil gets saturated enough to finally tip a tree whose roots were already compromised.

Past the property damage itself, there’s a liability angle worth thinking about. If a tree with a defect that could’ve been documented ends up damaging a neighbor’s property, or worse, injuring someone, the absence of any prior assessment becomes part of that conversation.

HOAs and commercial property managers carry this risk across dozens of trees at once, which is exactly why routine risk assessments have become standard practice for larger properties instead of something only individual homeowners think about.

Warning Signs That Mean It’s Time to Call

So when should you actually pick up the phone?

A tree that’s started leaning when it never used to. A new crack near the base or along a major limb. Dead branches showing up inside a canopy that otherwise looks healthy. Included bark visible where two stems meet on a mature tree. Buying a property with big trees and wanting documentation before you close. Running an HOA or managing property and handling risk across multiple lots on a schedule. Planning construction within 15 feet of a mature tree’s root zone. Or a storm just came through and something feels wrong even though nothing actually fell.

Certified Arborists Serving Salt Lake, Davis, Utah, and Weber Counties

We’ve worked Utah trees since 1967, which puts us among the longest-running tree service companies in the state, not that longevity alone means much without the credentials behind it.

Four ISA-certified arborists on staff means whoever shows up to look at your tree is trained in the same TRAQ methodology this whole page is built around. We know how cottonwoods behave near the Jordan River.

We know what a stressed silver maple looks like in Yalecrest versus one out in Sandy. That kind of specific, local knowledge doesn’t come from a crew rotating through the valley for one season and moving on.

Diamond Tree Experts serves residential, commercial, HOA, apartment, and municipal clients across Salt Lake, Davis, Utah, and Weber counties, from South Salt Lake out through Sandy, Sugar House, Murray, and Holladay.

Call us at (801) 262-1596. We’ll come look at it and tell you straight what we find and whether anything actually needs to happen.