Tree service in Ozark, MO: river bottoms and rocky hillsides

Two kinds of ground in one Christian County town

Ozark lies in Christian County, south of Springfield, on the Finley River. The bottoms along the river are alluvial, built from soil the water laid down over a long time: deep, fine, moist and rich. The slopes above them are the ordinary ground of the region, limestone bedrock with a thin skin of soil over it, in places only a few inches deep.

Those settings produce different trees, different failures and different work. Bottomland soil removes almost every limit on growth, so trees get big fast and carry more weight than their wood was built to hold. Hillside soil removes the ability to anchor, so trees stay smaller but come out of the ground whole. Thin soil and shallow roots are true of the Ozarks as a region; what is specific to this town is the river running through it, which puts real bottomland and real hillside inside the same few square miles.

Why the river bottom trees get big and then break

Trees add wood in rings, and the density of a ring depends on how fast it was laid down. On deep, moist bottomland soil, with water in easy reach most of the season, the fast species put on wide rings of comparatively light, low-density wood. The tree gains height and spread quickly, which is why a sycamore or a silver maple in a Finley River yard can shade the whole lot inside a couple of decades.

The cost arrives later. Low-density wood is weaker per square inch of cross-section than the tight-grained wood of an upland post oak, and the same conditions grow long horizontal limbs that reach far from the trunk. A long limb is a lever: the bending force at its attachment rises with how far the weight sits from the stem. Add an inch of ice, which coats every twig evenly and keeps building because no gusts come along to shake it off, and the limb goes.

That is why a large limb tearing out of a silver maple or a box elder is usually not evidence of disease. It is the species behaving normally at that size on that soil. The useful response is not a spray but a look at structure: which limbs are longest, which forks are tightest, and what sits underneath them.

• Sycamore, very large and fast, sheds bark in plates and drops limbs as a matter of habit
• Silver maple, fast and weak-wooded, worse still if it was ever topped
• Box elder, short-lived, often three stems out of one point at the ground
• Eastern cottonwood, extremely fast, brittle, with big limbs high in the crown
• Willow, soft and shallow-rooted, prone to splitting low on the trunk

High water, scoured banks and lost anchorage

The second bottomland factor is water itself. The Finley River rises with heavy rain and falls again, and ground near it spends part of most years saturated. Roots need air as well as water, and saturated soil holds very little air, so extended high water kills fine roots. A tree that has lost a share of them can look normal through the wet season and thin in the crown afterward, once the leaves need more water than the surviving roots can supply.

Moving water does something more direct. Current along a bank pulls soil from between and beneath roots, and each high-water event takes a little more. Debris traveling downstream, whole logs included, piles against trunks, wounds bark and pushes on the stem like a sail. A tree on an actively eroding bank can end up gripping less and less soil until the anchorage is gone, and that happens to trees with sound wood and full crowns.

Lean over water needs care, because two different situations look alike from the yard. A tree that grew leaning toward light above the channel has added wood on the loaded side its whole life: the trunk curves and turns back toward vertical near the top, and the base is thickened on the low side. A tree losing its footing is straight-stemmed and simply tipped, with the crown pointing off at an angle. Its evidence is at the ground on the upslope side, away from the water: soil washed out from over the root plate, roots bridging open air, a curved crack in the sod, or lifted turf behind the trunk. Only the second one is urgent.

Thin soil over limestone on the slopes and bluffs

Up the hillsides the constraint inverts. Roots meeting rock a few inches down cannot go through it, so they run outward just under the surface in a wide, flat plate. That plate is often broader than the crown and holds well in ordinary weather. What it cannot do is resist overturning the way a deep root system does, because the depth of soil gripping those roots is tiny next to the height of the lever above them.

Windthrow follows. Saturated thin soil loses much of its grip: water fills the pore spaces and the soil loses cohesion. A gust pushes on a full crown, the plate hinges on the downwind side and lifts on the upwind side, and the tree goes over with its roots attached, taking a circle of soil and turf with it. Cut the trunk afterward and the wood is frequently sound throughout. The ground let go, not the tree, and the tree with the most sail area over the least soil is the one that went.

The same thin soil creates the opposite problem in August, because a few inches over rock stores almost no water. A dry spell a bottomland tree barely registers puts hillside oaks under strain, showing as small pale leaves and dieback at the tips of upper branches, and repeated dry summers are cumulative. Prune those oaks in winter regardless. A cut made while an oak is in leaf invites oak wilt, and the trimming page sets out the calendar that follows from it.

Access on steep ground, and why it changes the work

On a flat, open lot a removal is mostly a question about the tree. On a steep hillside it is mostly a question about reaching the tree. A lift needs firm, fairly level ground for its outriggers, a chipper needs to sit near where brush will land, and a truck needs turning room. Hillside lots around Ozark often supply none of that: the drive is narrow and pitched, the turning room at the top is a parking pad, and footing after rain ruts under weight.

When equipment cannot get near a tree, the work changes form rather than stopping. A climber goes up on a rope and takes the tree apart in pieces, and each piece is rigged and lowered rather than dropped, because anything dropped free on a slope keeps going. Wood and brush then get carried or winched uphill to wherever the chipper could park, so a tree that would be a straightforward morning on a flat lot becomes a much longer job on a bluff-side lot. A contractor walking a slope or a bank should be reading the ground as closely as the tree: where the plate sits, which way the stem wants to go, and where a rigging point can be trusted.

• Where the truck and chipper will park, and the route crews take to the tree
• Whether the tree will be climbed and rigged or reached with a lift
• Which way wood and brush will travel, and across whose ground
• Where debris is stacked while the job runs, and whether it leaves the property
• Whether a rigging point goes into a neighboring tree, and whether that tree can take it

Taking a tree off a slope, and what happens to the soil

A tree on a hillside is also part of what holds the hillside together: roots bind the surface layer, the canopy intercepts rain before it lands on bare ground, and litter slows whatever water gets through. Remove the tree and all three stop at once, while the roots left behind decay over several years and release the soil they were holding.

On a steep lot the result appears in the first heavy rain, as soil moving downhill in sheets, small channels cutting in, and bare rock showing where there had been a few inches of cover. That layer was thin to start with and is not easily replaced, so a plan for the ground belongs with the plan for the tree: leaving the stump and roots in place rather than grinding them, covering the surface, and getting low growth established before the next wet season.

Clearing near the water deserves the same restraint. A strip of trees, shrubs and rough growth along the Finley River bank holds the bank against current, slows overland flow before it reaches the channel, and shades the water. Clearing to the edge for a view removes the only thing resisting the next high water, and the bank then retreats toward the house. Taking out genuinely hazardous stems while leaving the buffer intact is the better trade, and the Missouri Department of Conservation can say which species hold a streambank well.

Which bottomland trees are worth keeping

Not every big, messy bottomland tree is a problem to be solved. A mature sycamore is one of the finest trees in the region, and it is not defective because it peels bark in plates and drops the occasional limb. Removing one because the yard needs raking is a poor trade, and a tree that size cannot be replaced inside a working lifetime.

The honest question is not what the tree drops but what sits underneath it. Over pasture, a garden or the back corner of a lot, a sycamore can shed whatever it likes. The same tree with a long limb over a bedroom roof or a spot where children play is a different conversation, and even then the answer is usually reducing end weight on the two or three limbs that actually reach the target rather than removal. That reasoning sorts the rest quickly: a cottonwood at the back fence is a good tree, the same cottonwood leaning at the house is not, a box elder with three stems from one point will split eventually, and silver maple depends almost entirely on whether it was ever topped.

Street trees, right of way, and lines overhead

Ozark is a city in Christian County, and city rules and county ground are not the same thing. Within city limits the narrow lawn out past a walkway is usually municipal property, so a tree rooted there answers to city hall and not to the lot owner beside it, no matter who has raked its leaves for twenty years. One phone call before anything curbside gets cut prevents a genuine mess.

Wires are a separate matter and not tree service work at all. Vegetation around an energized conductor is the line owner's to manage, using crews equipped for live wire, so the move is to report what is touching and let them schedule it rather than hire it done.

Common questions here

The work, by type

Elsewhere in the Springfield area