Is river silt different from storm water in a cleanup?
Yes. River silt carries sediment, decaying plant matter and whatever the water has picked up from the streets, so it is handled as contaminated water. Storm water from a roof leak or a drain may be cleaner, but both are sorted at arrival and the protective gear and cleaning follow the result.
Silt is not only dirt. It holds moisture, traps fine particles in every porous surface and sticks to the bottom of walls, where it stays damp and grows mold if left. A surface wipe moves it around without taking it out, so the cleanup removes the silt physically first, then cleans what remains.
Some river water also carries fuel and oil from marinas, roads and yards. A sheen on the surface or a strong fuel smell is a reason to tell the crew before it starts, because it changes what can be kept and how the room is ventilated while the work runs.
How long does the river water stay in the structure?
Long enough to matter. Floors, wall bottoms and cavities hold moisture for days after the surface looks dry, and river flooding often leaves the ground saturated for longer, which feeds water back toward the foundation. The drying plan is written around readings, not around the day the water left.
Matthew showed that the river can stay high for days. The City's storm updates warned of standing water that could last that long in some places, and a home that is still wet after several days needs its readings taken again rather than assumed dry.
The crew checks the cavity behind the lowest wall, the subfloor under the finished floor and the sill plate where the framing meets the foundation. A house can look finished on the surface and still hold water in those places, so every check is logged.
Which materials usually have to come out after river flooding?
Carpet, pad, loose insulation, particleboard, paper and fabric that the water has soaked usually come out, along with drywall and plaster that the readings show will not dry to a usable standard. Hard surfaces, solid wood and framing are kept where they can be dried and cleaned.
Carpet and pad are the most common removal, because silt sits in the fibers and the pad holds water like a sponge. Particleboard cabinet bases and cheap shelving swell and lose their strength once soaked, and they are usually replaced after the drying has finished.
Solid wood framing, masonry and concrete are rarely removed, but they are cleaned and dried in place. Plaster over lath is opened where the readings stay high, and the rest is dried, since a full plaster removal on a river flood is the most expensive mistake a homeowner can make by accident.
What moves the scope and the price of a river cleanup?
The depth and length of the flood, how much silt entered the structure, how many floors and rooms it reached, and the materials it touched decide the scope. The price is explained and approved on site before the work begins, and changes are explained before they are made.
Silt depth on the floor is a quick guide to how much cleaning will be needed. A thin film cleans up in a few passes, while a deep layer means extraction, removal of the contaminated material and a second round of cleaning before drying can start.
Access also changes the work. A house with a raised foundation, a tight crawl space or a second-floor unit takes longer to clean because the equipment and the materials have to move through narrow openings. None of these factors is turned into a figure on this site; the crew sees the building and explains the scope first.
What should you keep, and what should you throw away?
Keep photographs, the list of damaged items and any receipts. Do not throw away wet items before the crew and your insurer have seen them, and do not wash contaminated fabrics or carpets at home, since that spreads the silt and the contamination.
Photographs taken before cleaning are the most useful record you can have. They should show the silt line, the depth of the water against a known object, each room and the items that were wet. A short video walk-through of the house works well alongside the photographs.
Items that will be thrown out should be photographed and listed first, then set aside outside the house if the crew allows it. Silt-covered furniture that has been stored in a damp garage can grow mold within days, so it should be moved out of the living area quickly.