Trenchless Crossing Surface Settlement Calculation
The ground settlement associated with trenchless crossing methods (such as boring or HDD) should be minimized to comply with design requirements and crossing agreements. This tool offers a quick assessment of surface settlement caused by trenchless crossing construction, taking into account factors such as pipe size, borehole diameter, and soil conditions.
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Output
Max. Recommended Allowable Settlement
| Site Feature | Max. Allowable Settlement |
| Underground Utilities | 1.0in (25.4mm) |
| Surface Streets | 0.5 - 1.0in (12.7 - 25.4mm) |
| State or Interstate Highways | 0.25 - 0.5in (6.3 - 12.7mm) |
| Railroads | 0.25 - 0.5in (6.3 - 12.7mm) |
| Lined Canal Bottoms | 0.25 - 0.5in (6.3 - 12.7mm) |
| Levee Crests | 0.5 - 1.0in (12.7 - 25.4mm) |