After a river gets into a building

River water arrives carrying whatever the watershed was holding: sewage from overwhelmed lines, fuel and farm chemical off the ground, and a great deal of fine silt. It is contaminated from the moment it crosses the threshold, and that single fact decides most of the demolition line before anyone takes a moisture reading.

The 2019 crest at Van Buren, and what a river flood is

The Arkansas River near Van Buren crested at 40.79 feet on June 1, 2019, 18.79 feet above its 22-foot flood stage and above the 1945 record of 38.1 feet. The Geological Survey assessed it as roughly a one-in-two-hundred-year event with peak flow near 570,000 cubic feet per second, and the Weather Service described near catastrophic flooding with residential subdivisions and businesses inundated on both sides of the river. About twenty-five homes were damaged in the Crawford County area, ports at Van Buren closed, and on May 28 an eighty-foot-wide, twelve-foot-high section of levee in the Yoestown Bottoms slumped against the rising river, threatening about 250 people in 152 residences before it held.

Two details of that flood matter to anyone cleaning up after one. First, it was slow. The river went over flood stage on May 22 and did not release until June, and it came back a second time to crest at 27.06 feet between June 23 and 27. Long submersion drives water deep into framing and masonry in a way a burst pipe never does. Second, the tributaries flooded independently. Lee Creek near Van Buren crested at 416.90 feet on June 1, its second-highest reading on record, backed up by the river it normally drains into. Houses well away from the Arkansas took water from a creek that had nowhere to discharge.

1. You callOne number per county. The dispatcher takes the address, the ZIP and a short description of what happened.
2. A local crew calls backAn independent restoration contractor already working that county rings you directly and sets a time.
3. They look, then scope itNothing is priced from a phone call. The crew walks the building, takes readings, and writes a scope you can hand to your adjuster.

Backwater is a different animal from a crest

Upstream in Franklin County the same 2019 event crested at Ozark at 374.99 feet on May 30, the second-highest on record against a 357-foot flood stage, and inundated thousands of acres of farmland and gas fields. Damage inside the county was comparatively light: sandbagged homes, water under some structures rather than in them, and a single flooded business that was pumped out, with only a verbal local disaster declaration. What the flood did instead was cut the county in half. The AR-23 bridge in southern Ozark and AR-22 west of Charleston near Fort Chaffee both closed, and extra ambulances had to be stationed at Charleston, Cecil and Webb City because there was no way to get someone from the south side of Ozark to the hospital in Ozark.

In Crittenden County the mechanism is backwater rather than a river crest. The Mississippi forms the county's entire eastern and southern boundary, and when it runs high it pushes water back up the St. Francis River and the drainage system behind the levees. That is what left hundreds of Crittenden County families homeless in 1927 and 1937. In May 2011 the river crested at Memphis at 48.03 feet, the second-highest crest on record against a 46-foot major flood stage; the mainline levees held, but a few homes along the river flooded and fields and roads went under, with county damage estimated at $500,000. Marion's levees survived 1927 and 1937 and the city was still inundated in 1964 and again in 1987. Being behind a levee changes the odds, not the physics.

Silt first, then sanitizing, then drying

The order is not negotiable and it is the part most people get backward. You cannot disinfect mud, and you cannot dry a building that still has a quarter inch of Arkansas River silt on the subfloor. The silt holds water, holds whatever came with it, and holds a food supply for growth. It gets shoveled, scraped and washed out while it is still wet and soft, because once it dries it turns to a hard skin that has to be chipped.

Only after the solids are gone does cleaning make sense: hard surfaces washed down, framing cleaned, then an antimicrobial applied to material that is going to stay. Drying comes last, because equipment run over contaminated wet material simply moves that material into the air. In a house that sat in river water for days, the drying phase is also the longest, since the water has had time to reach the middle of the framing and the bottom of the slab.

Capillary rise sets the demolition line, not the waterline. Water wicks upward inside wallboard, sheathing and studs above the height the flood actually reached, so the cut goes well above the visible mud line, at a height that leaves a straight, easily patched edge. Insulation in those cavities comes out over the full height that got wet.

What survives river water

The test is porosity and whether the surface can be cleaned rather than merely wiped. Dense, non-porous material can be washed and kept. Anything that absorbed contaminated water into its structure comes out, regardless of how well it would have dried after a clean loss.

Things worth knowing before the call

Flood damage from a rising river is normally not covered by a standard homeowner policy. It falls under separate flood coverage, and whether a household has it is often the single largest factor in what happens next. It is better to know that on day one than to find out after the demolition.

Electrical systems that were submerged are a separate issue from the water. Panels, breakers, receptacles and any wiring that sat under floodwater get evaluated by an electrician before power is restored to those circuits, and drying equipment gets fed from circuits that were never wet. Gas appliances that were submerged, including a water heater and a furnace, are usually replaced rather than dried, because their controls and burners are not designed to be cleaned out.

One more piece of local reality: being upstream of a dam on the Arkansas River is not flood protection. The Ozark-Jeta Taylor Lock and Dam and the other structures in the McClellan-Kerr system were built for navigation, not flood control, and property owners upstream of them are cautioned accordingly.

Before you call

That is the shape of the job. The specifics belong to your building.