Asphalt Sinking Along an Old Utility Trench: Who Should Review It?
If asphalt sinks along a former utility trench, contact the property manager and the party responsible for that excavation before ordering another surface patch. Ask for a review of both the pavement and the trench restoration. The alignment is a useful clue, but it does not prove what moved underneath or who is responsible for correcting it.
Connect the low strip to a documented project
Find the utility installation or repair date, contractor contact, work order, and any restoration photographs. Mark the low strip on a property sketch alongside the recorded trench route. If you only suspect an old trench, label that as unconfirmed rather than presenting it as the diagnosis.
Take dated photographs from a safe location, including a wider view that shows the entrance or parking aisle. Record whether the depression is new, appears to be changing, or affects an active walking or driving route. Ask the property manager to address access concerns while the review is arranged; do not enter an excavation or probe below the pavement.
Ask what the surface repair would leave unresolved
FHWA's pavement utility-cut manual discusses differential settlement in trench restorations and treats backfill, pavement base, and finished pavement as distinct restoration concerns. Although written for road agencies, it provides a useful reason to ask about the whole restored section rather than only the visible asphalt. It is not a private-property repair specification.
Ask the evaluator: What evidence connects this depression to the earlier excavation? Are records or further investigation needed before choosing a repair? If adding asphalt is proposed, what supports that approach, and what conditions would require a different scope? Avoid treating a smoother surface as proof that the underlying question has been answered.
Name the person who will close the loop
Request a written next step identifying who will review the utility work, who will evaluate the pavement, and who can authorize repairs. Keep any warranty or restoration agreement with the project record, but do not assume coverage simply because the depression follows the trench. Ask the responsible parties to explain their positions in writing.
Milliken Corporation offers asphalt repairs for driveways and parking lots. For a Middle Tennessee property, share the location, excavation history, and photographs when requesting an evaluation. Explain that the concern follows earlier underground work so the conversation begins with that history rather than a request to cover a dip.
Frequently asked questions
Does a low strip prove the trench was poorly compacted?
No. Its shape and location help direct the investigation, but they do not establish the cause. Ask the evaluator what evidence supports the finding.
What if the utility contractor is unknown?
Start with the property owner's work orders, prior management records, and available utility project contacts. Tell the pavement evaluator which information is missing rather than guessing who performed the work.