4.3 ROW Clearing, Grading & Topsoil Segregation

ROW Clearing, Grading & Topsoil Segregation

Quick Answer: After staking and one-call verification, the right-of-way (ROW) is cleared, grubbed, and graded to the elevations shown on the alignment sheets. Topsoil is stripped and stockpiled separately so it can be replaced during restoration. The API 1169 inspector verifies that clearing width matches the spec and permit, that grading is within permitted limits, that topsoil segregation is maintained, and that erosion controls are installed before trenching begins.

Clearing

Clearing removes vegetation and obstacles from the ROW so equipment can move and the trench can be excavated. The clearing width is set by the project specifications and the applicable permits — it is not the contractor's choice.

Clearing-Width Controls

Inspector checkpoint: Clearing beyond the permitted width is a permit violation and a nonconformance. The inspector measures clearing width at intervals and records the measurements.

Grubbing

Grubbing is the removal of roots, stumps, and organic material from the cleared ROW so the trench can be excavated and the pipe laid on stable soil. Grubbing depth is project-specific. The inspector verifies:

• Stumps and roots are removed to the depth required by spec
• Organic material is disposed of (or stockpiled) per spec and permit
• Grubbed material is not mixed with topsoil stockpiles
• The subgrade is stable before grading

Topsoil Segregation

Topsoil segregation is the practice of stripping the fertile top layer of soil and stockpiling it separately so it can be replaced as the surface layer during final restoration. It is one of the most heavily inspected front-end activities because it directly affects landowner restoration success and permit compliance.

Segregation Requirements

• Strip depth is set by spec or permit (commonly 4–12 inches, depending on soil depth)
• Topsoil is stockpiled separately from subsoil and spoil — never mixed
• Stockpile placement must be within the permitted ROW or extra workspace
• Stockpiles are temporary and must be erosion-controlled
• In agricultural land, topsoil is handled to preserve fertility and structure

Inspector checkpoint: If topsoil is mixed with subsoil, trench spoil, or grubbing debris, the segregation is lost and the landowner's surface is degraded. The inspector verifies the stockpile is clean and clearly separated.

Grading to Elevation

Grading brings the ROW to the design elevations shown on the alignment-sheet profile. The inspector verifies:

• Grade is within tolerance of the design profile
• Grade breaks match the profile stations
• Excessive cut or fill is flagged and resolved
• Sidehill benches are constructed where the profile requires
• Drainage is maintained or redirected per permit during grading

Spoil Placement

Spoil from grading and (later) trenching is placed within the permitted ROW. The inspector verifies:

• Spoil is not placed outside the ROW-limit stake
• Spoil is not placed on topsoil stockpiles
• Spoil is placed to allow stringing, welding, and lowering-in access
• In constrained workspaces, spoil handling follows the special-conditions plan

Erosion and Sediment Controls

Erosion controls must be installed before or during clearing and grading, not after. The inspector verifies that:

• Silt fence and wattles are installed along the toe of slopes and at ROW boundaries
• Water bars and diversions are installed on slopes per the erosion-control plan
• Trench plugs and breakers are planned for the trench phase
• Inlet and outlet protection at waterbody approaches is in place before work near the waterbody
• Erosion-control devices are inspected and maintained throughout construction

Inspector checkpoint: Permit conditions typically require erosion controls to be in place before soil disturbance. Installing controls after clearing has begun is a permit violation.

Fences, Gates, and Access Roads

Landowner and permit requirements drive fence, gate, and access-road work:

• Temporary gates are installed where the ROW crosses fences, so livestock and people are contained
• Access roads are constructed or improved at agreed locations and grades
• Road approaches meet road-authority requirements (sight distance, culverts, gravel)
• Fence cuts are repaired or restored per the line list at closeout

Staying Within the Permitted ROW

The single most important ROW-clearing and grading rule: all work stays within the permitted ROW and extra-workspace areas. The inspector verifies:

• No clearing, grading, spoil, or equipment outside the ROW-limit stake
• Extra-workspace areas are used only where permitted
• Special landowner requirements (setbacks, avoidance areas) are respected
• Any work outside permitted limits is a nonconformance and a permit violation

Daily Documentation (Clearing/Grading)

The inspector's daily report during clearing and grading captures:

• Stations cleared and graded that day
• Clearing-width measurements
• Topsoil-strip depth and stockpile locations
• Erosion-control installations
• Fence and gate modifications
• Any work outside permitted ROW
• Clearing and grading acceptance

Key Takeaways

• Clearing width is controlled by spec and permit; over-clearing is a nonconformance and a permit violation.
• Topsoil must be stripped and stockpiled separately from subsoil, spoil, and grubbing debris for successful restoration.
• Grading must match the alignment-sheet profile; grade breaks occur at the profile stations.
• Erosion controls are installed before or during soil disturbance, not after.
• All work — clearing, grading, spoil, equipment — must stay within the permitted ROW and extra-workspace areas.