You have a plot to level, a foundation to set, or a trench to open in an open field, with no walls, fences, or structures forcing the machine along a fixed path. The ground can be worked from multiple sides, the excavation walls can slope outward, and the spoil can be deposited alongside without needing to haul it away immediately. This is the typical condition of open-cut excavation.
What open-cut means
An open-cut excavation is one where the walls are not vertical and retained, but sloped outward at a gradient — the slope — that depends on the nature of the soil. The looser the soil, the wider the slope must be to prevent collapse. In compact, dry ground the wall holds at a steep angle; in sandy or wet ground a much gentler slope is required.
The practical consequence is that an open-cut excavation takes up far more surface area than the depth it reaches. A narrow hole at the bottom can require a working area two or three times as wide at the top. This makes it suited to open spaces — vacant lots, fields, large yards — and impractical where surface space is limited.
The difference from confined-section cuts
In a confined-section cut the walls are vertical or nearly so, held back by shoring, sheet piles, or formwork. The volume of soil moved is smaller, the surface footprint is contained, but specific retention equipment is required and the process is slower. It is the only option in historic city centers, between two buildings, or along a street where there is no room to widen.
Open-cut excavation, on the other hand, eliminates the problem of wall retention: the slope holds on its own if it is correctly dimensioned. Work moves faster, with simpler equipment, but space is needed. When space is available, it is almost always the quickest and most cost-effective choice. For a deeper look at the differences between methods, you can also read Area excavation vs. bulk excavation: the key differences.
Slopes and safety: what to check before digging
Slopes are not improvised. Before opening the excavation, you assess the soil type — clay, sand, gravel, mixed — and the presence of groundwater. Ground that appears compact when dry can give way quickly after heavy rain. For this reason, slopes are monitored throughout the work, not only at the start.
A load-free buffer zone is maintained around the excavation: heavy equipment, spoil piles, and materials must not be placed at the edge, because weight at the top of the slope reduces its stability. Anyone working inside the excavation must always have a clear exit route, and the bottom must be free of standing water before proceeding with subsequent operations.
Equipment for excavation and soil management
Opening the excavation is handled by excavators and loaders, sized according to depth and soil hardness. This part of the work requires machines with a boom and bucket, which in open ground have plenty of room to maneuver without difficulty.
The problem that is often underestimated is the next step: the removed spoil has to be hauled out of the work area. On an open jobsite with wide access, a dump truck handles everything in a few runs. But as soon as the jobsite has a narrow gate, a side driveway, or a pedestrian access, the dump truck cannot get in and the soil stays piled at the edge of the excavation until another solution is found.
In the Cormidi lineup
When soil hauling is the bottleneck — due to tight access, soft ground, or areas where a wheeled machine leaves deep ruts — Cormidi tracked dumpers cover that part of the job. The tracks distribute weight over a large surface area, so you can move over loose or wet ground without getting stuck, and reach places a dump truck or wheeled skid steer cannot.
The tipping skip unloads soil directly at the right spot, with no manual handling. On jobsites with tight passages and a high number of runs, that difference shows up by the end of the day. You can read how hauling is organized in similar situations in the article Soil hauling: which machines simplify the job.
What to check before you start
Before opening an open-cut excavation, three concrete checks: assess the soil type and the presence of groundwater, identify where the spoil will end up and whether the exit route is passable by the equipment you have available, and verify the presence of underground utilities — sewer lines, pipes, cables — along the entire perimeter of the excavation. Then talk to your local dealer to find out which hauling machine can actually get into your jobsite.
