
Water, sewer and conduit
Utility Trenching in Allentown, PA
Trenches dug to depth, bedded, backfilled and compacted, with street openings permitted and patched to city standards.
- Free on-site estimates
- Written, line-item quote before any digging
- PA One Call request placed before every dig
Trenches for the Lines That Serve Your House
Utility trenching is the digging that lets a water service, sewer lateral, gas line or electric conduit get from the street or the panel to where it is needed. In Allentown, most of these jobs are on older homes, where a clay or cast iron sewer lateral has cracked or filled with roots, or a water service has started to leak. Our part is the excavation: locating, digging to depth, shoring or sloping where needed, bedding, backfilling and restoring the surface. Licensed plumbers and the utilities handle the connections.
Sewer laterals
A lateral that backs up or tests poorly on camera often has to be dug up and replaced. HomeAdvisor lists sewer line replacement at $60 to $250 per linear foot and trenching at $4 to $12 per linear foot, with most sewer jobs between $1,388 and $5,323. If the lateral runs under the street, the work becomes a street opening that needs a City of Allentown Public Works permit, with the application due at least three work days ahead.
Water service lines
A leaking water service is worth fixing quickly on limestone ground. When Allentown's North 10th Street sinkhole opened in 2011, the city's public works director said a broken water line may have caused it or been caused by it. Water running steadily into the ground can wash fines out of soil above voids in the rock. HomeAdvisor puts water main replacement from the street to the house at $50 to $150 per linear foot typically, with dig-and-replace trenching running $50 to $250 per foot.
Conduit and other lines
We also dig for underground electric to garages and outbuildings, generator gas lines, irrigation mains and data conduit. Depth and bedding follow what the electrician, gas installer or code requires, and warning tape goes in above the line where specified.
Trenching in the street
Allentown's code calls for street excavations to be open cut, not undercut, and backfilled with approved crushed aggregate that is compacted. The permittee keeps up the patch for twelve months, and where several cuts are close together the city can require milling and overlay. We include that restoration in the quote, so the price covers the whole job and not just the hole.
Safety
Trenches deeper than about five feet need protection under federal OSHA rules, either sloping, benching or a trench box. We set up for the depth before anyone works in the trench and keep spoil back from the edge.
What This Covers
Trenching covers short runs across a yard up to full street-to-house replacements.
Sewer lateral trenches
Dig-and-replace laterals from house to main, including street openings.
Water service trenches
New or replacement service lines at frost-safe depth.
Electric and gas conduit
Trenches to garages, outbuildings, generators and lighting.
Septic and drain lines
Trenches for septic connections, drain fields and storm lines.
Street restoration
Compacted aggregate backfill and permanent patching to city standards.
Trench protection
Sloping, benching or a trench box for deeper cuts.

Typical Utility Trenching Costs
| Job | Published range |
|---|---|
| Trenching (HomeGuide) | $5 to $12 per linear foot |
| Trenching for sewer, septic or drainage (HomeGuide) | $500 to $1,200 |
| Sewer line replacement (HomeAdvisor) | $60 to $250 per linear foot |
| Typical sewer line project (HomeAdvisor) | $1,388 to $5,323 |
| Water main to house (HomeAdvisor) | $50 to $150 per linear foot |
| Trenched water line replacement (HomeAdvisor) | $50 to $250 per linear foot |
Published ranges from the sources named in each row; most are national figures. Rock, soil, access, haul distance and permits change the total. Your written estimate is the price.
How It Works
1. Locate
PA One Call request filed and private lines discussed with you.
2. Permit
Street opening or township permit applied for if the trench reaches the right-of-way.
3. Dig and lay
Trench dug to depth and protected, line bedded and installed by the trade responsible.
4. Backfill and restore
Compacted backfill, then lawn, walk or street surface restored.

Utility Trenching Questions
Who owns the sewer lateral?
In most Pennsylvania municipalities the property owner is responsible for the lateral from the house to the public main, sometimes including the part under the street. We confirm the rules with the city or authority before digging.
How deep do water lines need to be?
Deep enough to stay below frost. Local water authorities set the minimum, and we dig to what they and your plumber require.
Can you avoid tearing up my driveway?
Sometimes. A route around the driveway, or a short bore under it, can be cheaper than removal and replacement. Some laterals can also be lined without digging, which is a plumber's call.
Do you get the street opening permit?
Yes. For City of Allentown streets we apply to Public Works at least three work days ahead and include the restoration deposit and patching in our price.
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Get a Utility Trenching Estimate
Free trenching estimates in Allentown.