Stripping: The Topsoil Comes Off First and Goes Back On Last
Stripping takes the organic surface soil off a site before the earthwork starts, because nothing structural can be built on it. IRONWILL Earthworks strips to the depth the geotechnical report sets, then stockpiles the topsoil for re-spread, works it into the balance where the report allows, or hauls it, on sites across Texas and Oklahoma.
What stripping is, and where the topsoil goes
Once a site is cleared and grubbed, the ground is still covered in the soil that grew what was on it: roots, organic matter and the dark surface layer. That layer cannot stay under a building pad, a pavement section or structural fill, because organic material breaks down and compresses, and the ground above it settles. Stripping takes it off, usually the top few inches. The geotechnical report sets the depth, because the borings are what show where the organics stop.
On private work, which is most of what we build, the report governs. The building code requires the geotechnical investigation behind compacted fill under a foundation to specify how the site is prepared before the fill goes on, and the fill has to follow that report1. When a report needs a number for organic content, the lab burns a sample off at high temperature and weighs what is left2. On public work, TxDOT's topsoil item governs how topsoil is stockpiled and placed3.
| Where it goes | When it fits | What governs it |
|---|---|---|
| Stockpiled for re-spread | Most sites: the landscape areas, slopes and anything that will be seeded or planted need it back at the finish | The plans and the stormwater plan4; on public work, TxDOT's topsoil item3 |
| Into the balance | Non-structural fill such as landscape berms and green space, where the report allows organic soil | The geotechnical report1 |
| Hauled off | When there is more than the site can use, or nowhere to keep it | The plans, and a site that will take it |
Measured in cubic yards
Stripping is a volume like the rest of the earthwork: the area times the depth. Three inches over an acre is about 403 cubic yards, and six inches is about 807, so the depth in the report moves the number more than the acreage does. We take both off the plans and the report before the takeoff, not off a rule of thumb.
Kept inside the stormwater plan
The state's construction stormwater permit counts grubbing and stockpiling among the activities that start construction, and it requires native topsoil to be preserved unless what an area is being built for requires it to be disturbed or removed4. So we strip the footprint that has to carry load and leave the rest, keep the stockpiles where the stormwater plan puts them, and protect them until the topsoil goes back down.
Back on last
At the end of the job the topsoil goes back on, spread over the landscape areas to the finished grade so the site can be seeded or planted. Where equipment has packed ground that is going to be seeded, the permit expects it loosened first4, and on public work TxDOT scarifies four inches before the topsoil is placed, then spreads it to a uniform depth and rolls it lightly3. It is one of the last steps in our order of work, with the curbs backfilled.
Where it sits in the order of work
Stripping comes after clearing and grubbing and demolition, and before bulk cut and fill, so the cut and the fill start on clean ground. The whole sequence is on our site preparation page.
Every step in the sequence has its own page. For all of it in order, read site preparation.
The order we work in
- Read the geotechnical report for the stripping depth and where the organics stop1
- Stormwater controls in before the ground is opened4
- Clear and grub
- Strip the footprint that has to carry load, to the report's depth
- Stockpile the topsoil where the plan puts it, and protect it
- Bulk cut and fill on clean ground
- Re-spread the topsoil over the landscape areas at the finish
What we bring to a site
- The geotechnical report read before the takeoff, so the stripping depth is priced from the borings
- The cubic yards worked out from the plans: what stays, what goes back on, what leaves
- Stockpiles placed and kept inside the stormwater plan4
- One self-performing contractor from the first tree to the last of the topsoil
Where we work
Texas and Oklahoma, from our base in Dallas. The surface soil changes from one site to the next, which is why the depth comes from the report and not from the map.
Stripping questions
What developers and general contractors ask about the topsoil.
How deep do you strip?
Can the topsoil go back into the fill?
What happens to the stockpile?
How is stripping measured?
Do you re-spread the topsoil at the end?
Sources
Every number and every rule on this page is cited here. Reviewed October 1, 2026.
- 2021 International Building Code, Chapter 18: Soils and Foundations (as adopted in Texas)International Code Council, via UpCodes, 2021Section 1803.5.8 (the geotechnical investigation specifies the preparation of the site before compacted fill is placed), 1804.6 (compacted fill under shallow foundations complies with the approved geotechnical report) and 1804.3 (backfill free of organic material).
- ASTM D2974-20e1, Standard Test Methods for Determining the Water (Moisture) Content, Ash Content, and Organic Material of Peat and Other Organic SoilsASTM International, 2020Organic material measured by igniting an oven-dried sample and weighing the ash (Method A, 440 degrees C).
- Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges, adopted September 1, 2024Texas Department of Transportation, 2024Item 160, Topsoil: stockpiled in a windrow at designated locations and kept drained; the area scarified to a depth of 4 inches before topsoil is placed; spread to a uniform loose cover, watered and rolled; measured by the station, the square yard or the cubic yard.
- TPDES General Permit TXR150000, Stormwater Discharges from Construction ActivitiesTexas Commission on Environmental Quality, 2023Part I: commencement of construction includes grubbing and stockpiling of fill material. Part IV, Section A: preserve native topsoil unless the intended function of an area dictates its removal (item 7), and condition compacted soil before seeding where vegetation will be established (item 8).
Have a site to strip?
Send the plans, the geotechnical report and the acreage. We will tell you how deep the stripping goes, how many cubic yards that is, and what goes back on at the end.