Underground utility questions, answered

Does 811 mark every underground line on my property?

No. 811 marks the utilities that are owned by the utility companies, such as public water, sewer, gas, electric and communications. Lines that belong to you, the homeowner, are not marked.

In New Jersey you call 811 (NJ One Call) at least 3 business days before you dig. The utilities then mark what they own. The marks stop where their ownership stops, usually at the meter or the curb. Past that point the pipe or cable is yours, and nobody marks it for free.

Private lines are the ones that cause surprise hits: the feed to a detached garage, barn or shed, a well line, irrigation lines, landscape and driveway lighting, a gas line to a grill or generator, a septic line, a pool line, and any cable somebody buried years ago and never wrote down.

How do I find out whether vacant land has water and sewer available?

Ask the people who run the systems, in writing, and do it before you close. The town and the utilities can tell you what serves the street. Only an answer from them tells you what serves your lot.

Start with the town. The planning or engineering office can tell you whether the street is on public water and public sewer, or whether the area runs on wells and septic. Then ask the water and sewer provider for that street whether there is a main in front of your lot, how far away it is, and whether it has room for a new connection.

If there is no public sewer, the lot needs a septic system, and that depends on soil testing and the health department. If there is no public water, it needs a well. Both have to fit on the lot together, with required separation between them.

A main on the street is not the same as a legal right to connect. Many towns require approvals, fees and sometimes a wait. Get the answers in an email or letter, not from a phone call you cannot prove later.

What is the difference between utilities “at the street” and utilities connected to the property?

“At the street” means a main runs past your lot. “Connected” means there is a service line from that main to your building, and you can use it. The distance between those two is usually the expensive part.

A listing that says “water and sewer at the street” tells you the mains exist. It does not tell you there is a service stubbed onto your lot, whether a tap has been made, whether the connection fees were paid, or whether the line you would use is the right size.

Connecting means a tap into the main by the utility or its approved crew, a service line from the main to the building, the work in the road if the main is on the other side, the permits and inspections, and the plumbing connection inside. Each is a separate piece with its own approvals.

How much does it cost to bring utilities to vacant land in NJ?

It depends on the lot, and nobody can give an honest number without seeing it. The cost is made up of several separate pieces, and distance and what is underground change the total more than anything else.

These are the parts that make up the bill. Ask for each one to be listed separately so you can see what is yours to control.

What should I check about underground utilities before buying a house?

Find out what the house is on, what shape the lines are in, and who owns what. A sewer camera inspection before closing is the best money you can spend on this.

A standard home inspection does not look inside the buried sewer line or water service. Those are out of sight, and they are among the most expensive things to fail after you move in.

Can you install utilities along a long driveway or across someone else's property?

A long driveway is routine work. Crossing someone else's property is possible only if there is a legal right to do it, and that is a question for an attorney or a surveyor, not for us.

Along your own driveway, the questions are practical: where the line can go without conflicting with the septic, well, drainage or existing utilities, how to get equipment in, whether the route needs bores under the pavement or tree roots, and what the utility needs to see before it will connect.

Across another person's land, the question is whether you have the right. That may be an easement, a recorded right of way, or a shared driveway agreement. What it allows, who maintains it and whether it covers new utilities are legal questions about your specific property. Have a real estate attorney review the documents and a licensed surveyor mark the actual boundary and easement lines.

Once you have that, we can plan the route, get the approvals, and build it. We will not guess at a property line.

What underground work should be completed before paving a driveway?

Every line that will ever need to cross the driveway should go in first, with spares. Digging up new pavement later costs far more than a few extra feet of pipe now.

Pavement is the last thing to go on, so anything that might cross it should already be in the ground before the base is graded.

Can you repair one section of my sewer line, or should I replace the whole thing?

If the camera shows one clear problem and the rest of the pipe is in good shape, a spot repair is reasonable. If the problems are spread along the line, replacing it costs less in the end than repairing it a piece at a time.

The camera inspection decides this, not a guess. It shows the material, the joints, the grade and every defect along the run.

Will tree roots come back after my sewer line is cleaned?

Yes, if the opening that let them in is still there. Clearing roots removes the roots. It does not close the crack or open joint they came through.

Roots go where there is water and air. A joint that leaks a little gives them both. Cutting the roots out buys time, and they grow back into the same opening, usually faster each time.

Clearing roots is a temporary repair. It lets a household keep flushing toilets and showering while the real fix is arranged. That means utility locates being called in to either replace the section of pipe or line the pipe, whichever makes the most sense for that line. The camera shows which one it is.

If a line needs clearing again and again, the cleaning bills are an expensive way of not fixing it. Ask for a camera inspection and a written recommendation.

What is a belly in a sewer line, and does it need to be fixed?

A belly is a low spot where the pipe has sagged and water sits instead of draining. Lining the pipe almost never fixes it, because the problem is the ground under the pipe.

The camera shows a belly as standing water in the pipe where the rest of the line is clear. Waste sits in that low spot, solids settle, and the line backs up or slows down again and again, even after it is cleaned.

Whether it needs fixing depends on how deep the water stands and how often the symptoms return. A shallow belly that holds a little water may be watched. A deep one, or one with repeated slow drains, backups, sewer odor or gurgling, will not get better by itself.

A belly almost never can be cured by lining the pipe. It exists because the soil under the pipe has sunk, and a liner follows the pipe exactly, so a lined belly is still a belly. The fix is to dig, re-bed that section on firm, well-compacted material or replace it, and bring it back to the right grade.

What does an offset sewer joint mean, and does it need repair?

An offset joint is where two pipe sections no longer line up and one sits higher than the other. A small one can be monitored. A big one catches waste and roots and usually needs repair.

Offsets happen when the ground shifts, a trench was not properly backfilled, or a root or load pushes a pipe out of line. On the camera it looks like a step or a lip at the joint.

What matters is how big the step is, whether the joint is also open or leaking, and whether roots or debris are already building up there. A slight lip with a tight joint may be fine for years. A large step, or one with roots coming in, tends to get worse.

A single bad offset in an otherwise sound line is a good candidate for a spot repair: dig to the joint, replace that piece and re-bed it. Several offsets along a line suggest the ground or the pipe is the problem.

Why does my sewer back up every time it rains?

Rain gets into the sewer system where it should not. The cause is usually on your property, but not always, so find out which before you spend money.

Backups in wet weather are about extra water. Cracks, open joints and root-damaged pipe let groundwater in. Roof drains, sump pumps or yard drains tied into the sanitary line send rainwater straight in. Or the town main is overwhelmed in heavy rain and pushes back up the laterals.

Do I need an outdoor sewer cleanout, and where should it go?

Yes, you want one. A cleanout is a capped access pipe that lets a camera, a cable or a plumber into the line without tearing anything up.

The plumbing code calls for cleanouts at certain points, and your plumber or the plumbing inspector can tell you what applies at your address. Even where it is not strictly demanded, a line without one is slower and more expensive to inspect and clear.

Can my sewer line be rerouted around an addition or swimming pool?

Yes. A line should not run under a foundation or a pool, so rerouting it before the new work starts is a normal and sensible step.

The new route has to keep the pitch the line needs to drain, avoid unnecessary bends, include a cleanout, and meet whatever your town and inspector require. It also has to avoid the new footings, the pool and its equipment, and any easements.

Timing matters most. Do it before the foundation is poured or the pool is dug, while the ground is open and the machines are already there. After that, the options narrow and the cost climbs.

A camera on the existing line first tells you whether it is worth keeping in the new layout or should be replaced as part of the reroute.

Can you replace a sewer line underneath a road?

Yes, but it is a different kind of job. The road belongs to the town, county or state, so the permits, the traffic control and the repair standard are set by them.

Before anything is dug, you need to know who owns the pipe under the road. There is no statewide rule. It is set by your town or sewerage authority, and it varies. Ask where their responsibility ends before you accept any quote that includes the road.

The work itself is either an open cut across the road, repaired to the owner's specification, or a trenchless method that goes under the road without opening it. Which one fits depends on depth, other utilities in the way, ground and what the road owner allows.

Can you replace the water or sewer line beneath my basement floor or foundation?

Yes, we can replace it, but it is usually very invasive. Customers need to be prepared to have the floor removed and reinstalled.

Under a slab, the line has to be reached to be replaced. That means opening the concrete along the pipe, digging out the soil, installing the new line on a proper bed, backfilling and compacting, and putting the slab back.

Where the line only crosses the foundation, the fix is often different. A new line can be bored under the footing, or the old one can be pulled and replaced, so the foundation itself stays untouched. The foundation wall is not cut unless there is no other way.

Can I connect a detached garage, barn or accessory dwelling to my existing sewer or septic system?

Sometimes. On public sewer it is mostly a question of routing and permits. On septic, the system has to be big enough and approved for the added use, and that approval comes from your local health department.

On public sewer, the new building needs its own line to the existing lateral or to the main, at the right pitch and depth, with a cleanout. Your town controls the permit, and the plumbing is done by a licensed plumber. If the new plumbing sits lower than the sewer, it needs a pump.

On septic, the system was designed for a certain number of bedrooms and fixtures. An accessory dwelling or a barn bathroom adds flow, and the system may not be sized for it. The local health department decides whether the existing system can take it, and a new or larger system needs a design from a licensed professional and an approval.

A floor drain in a garage or barn is a separate question. Many of them cannot go to the sanitary sewer or septic. Ask your health department or plumbing inspector before you plan one.

Why does my sewer keep backing up after it has been snaked?

Snaking opens a hole through the blockage. It does not fix what caused it, so the line clogs again until the cause is dealt with.

A line that keeps backing up has a reason. A belly holds waste, roots grow in at a joint, a joint is offset, a section has collapsed, or grease and debris keep building in a rough pipe.

A camera inspection shows which. Without it, you are paying to clear a line again and again. Once the cause is known, the fix may be a spot repair, a lining, or replacing the line.

Does a cracked sewer pipe always need replacement?

No. It depends on the crack, where it is and what shape the rest of the pipe is in.

A single crack in a pipe that is still round and holds its grade can often be repaired in one spot or lined. A crack with roots pouring in, a pipe that has shifted, or a section that is breaking apart is more serious. A line with cracks along its length is usually cheaper to replace than to repair one at a time.

The camera shows the answer. Ask to see the footage.

Can you replace the section where my sewer connects to the municipal main?

Yes, with the town's approval. The connection point is on the town's main, so the town sets the rules and usually inspects the work.

Who owns the pipe from your property line to the main is set by the town or sewerage authority, and it varies. Ask where their responsibility ends before you get a quote.

The work often means digging in the street and making a new connection to the main, so a permit, traffic control and a road restoration standard come with it. In some towns the connection to the main is made by the town's own crew.

What is a sewer ejector or grinder pump, and when is one needed?

Both are pumps that lift sewage when the plumbing is lower than the sewer line. Gravity cannot move it, so a pump has to.

An ejector pump sits in a sealed basin, often in a basement, and pushes waste, including solids, up to the sewer line. A grinder pump chops solids into a slurry first, so it can push it through a smaller pipe over a longer distance. Some sewer systems are built for grinder pumps.

You need one when a bathroom or laundry in a basement is below the sewer, or the house itself sits below the sewer. They need power, a vent, a check valve and an alarm, and they need maintenance. A permit is normally required.

Can a house connect to public sewer if it sits below the road?

Often yes, with a pump. A pump lifts the sewage up to the main in the road.

The sewer authority has to approve the connection and the pump arrangement, and many have specific requirements. The pump, its basin, the power and the alarm are the homeowner's to own and maintain, and the line is usually a pressure line from the pump to the main. A backwater valve is often required too.

Septic may be the cheaper long-term answer in some cases. Compare both, with the connection and pump costs listed.

Can an abandoned water or sewer line be reused?

Sometimes a sewer line can, if the camera shows it is sound. A water line is much less likely to be worth reusing, and the utility may not allow it.

An abandoned line has been sitting unused, with unknown damage, blockages and connections. Do not assume it is good. For a sewer, we camera it, check the grade and the joints, and see if the connection to the main is intact and approved. For water, old steel and lead lines are usually better replaced, and the utility often requires a new service.

A line that is not reused should be properly capped or filled, not just left, so it cannot leak, collapse or confuse the next contractor.

Can underground utilities be moved so I can build an addition?

Usually yes, and it is best done before the foundation is dug. Who moves a line depends on who owns it.

Lines that belong to you, such as the sewer, the water service, a septic line and private power, can be rerouted by us. Lines owned by the gas, electric or telephone companies are moved by the utility or with its approval, and that takes lead time, so call them early.

The new route has to keep the pitch, avoid the new footings, include cleanouts and stay accessible. A camera on the old line first tells you whether it is worth keeping.

Can I build a patio, retaining wall or driveway over an existing utility line?

Sometimes, but avoid it when you can. A line under a structure is hard and expensive to repair, so the better move is usually to reroute or protect it first.

A driveway or a lawn can sit over a line with little trouble. A patio, a wall or a structure with a footing is different. A repair there means taking part of it apart, and a heavy footing can load and crush a pipe.

If the line is in good shape, we can sleeve it, set it deeper or leave a way in. If it is old, replace it before you build. If the line is in a utility easement, there may be rules about what can go on top of it. That is a question for the utility and, for the legal side of your property, an attorney or a surveyor.

How do you get water to a barn, pasture or livestock watering station?

A buried water line, run below frost depth from the house, a well or a pump, ending at a freeze-proof hydrant or a heated waterer.

The details decide whether it works in January.

Can you install a frost-free yard hydrant?

Yes. A frost-free hydrant has its valve buried below the frost line, with a drain at the bottom so the pipe empties when the handle is off.

The hydrant stands on a water line we trench in to the depth needed. The valve and drain sit in a bed of gravel so water drains away. A licensed plumber makes the connection to the supply line.

A hose left on a hydrant in winter can keep it from draining and freeze it, so remove it. Backflow protection on the hydrant is normally required so that water cannot siphon back into the line.

Can you run utilities beneath a stream or drainage ditch?

It can be done, usually by boring under the channel, but streams and ditches are regulated, so find out what approvals apply before you plan the route.

A bore goes well below the bed, so the channel and banks are left alone. The depth, the entry and exit points and the erosion control are planned carefully, because we have to be sure the pipe or conduit stays buried after a storm.

Depending on the stream, the ditch and who owns it, the work may need approval from the town, the county, the soil conservation district or the state. We will tell you what we see and what to ask. We do not decide it for you.

How do you install utilities on a steep property?

Carefully. The slope changes how the machine is positioned, how the trench is dug and how you keep the trench from turning into a stream.

A few things come up on every steep job.

Should I replace old underground pipes before installing expensive landscaping?

If there is a real chance they fail soon, yes. Digging up new landscaping later costs far more than replacing the pipe first.

Have the sewer scoped, find out what the water line is made of and note when it was installed. Old clay, Orangeburg or cast iron in the sewer, and galvanized or lead in the water, are the red flags. So is a history of backups, repairs or low pressure.

Also add the lines you will want later while the ground is open: conduit for lighting, irrigation sleeves and spares. Planting comes last.

Why does my yard drain work during light rain but overflow in heavy rain?

The system is moving some water, but not enough of it. Something is limiting how much it can carry.

Light rain does not test the system. Heavy rain finds the weak point.

Can you replace a drainage pipe without removing the driveway?

Sometimes. It depends on how deep the pipe is and how it must slope. A drain has to fall at a steady grade, and that decides whether it can be done without opening the pavement.

Drainage pipes rely on gravity. If the slope is off, water sits in the pipe. Trenchless methods like pulling a new pipe through the old one, or boring, can work well, but they are harder to do accurately at shallow depths with very little fall.

Where the trenchless route will not hold the grade, the better answer is to cut a narrow strip across the driveway, replace the pipe on a proper bed and patch the strip. A clean, narrow cut and a good patch is better than a pipe that does not drain.

We look at the pipe on camera first to see what shape it is in, and tell you which method fits.

Why is water coming through the opening where a utility pipe enters my basement?

Either the pipe itself is leaking, or water from the ground is following the pipe in through a seal that has failed. Find out which before sealing anything.

A quick test: turn off all water use and watch your meter. If it still moves, the leak is in the pipe. If the meter is still, it is groundwater or surface water finding the opening.

Water from outside often comes through because the trench around the pipe is a path. Backfill there is looser than the surrounding soil, so rain and groundwater run down the trench to the foundation. Caulking the inside rarely lasts. The better fix is outside: expose the penetration, reseal it properly, and rebuild the backfill and grade so water goes away from the house.

Can a crushed underground downspout pipe be repaired?

Yes. We find the crushed spot, dig it, and replace that section, usually with stronger pipe and enough cover to protect it.

Thin corrugated pipe collapses under a vehicle, a mower or just the weight of the soil when it is too shallow. The symptoms are water backing up at the gutter, overflow at the downspout, or a wet spot or depression over the line.

We locate the pipe, find where it is crushed, and replace the damaged piece. If it is crushed in several places or was never installed at a good slope, replacing the full run is the better answer. We make sure the outlet is clear and the water is discharged away from the house.

Why is water collecting around my septic tank or sewer cleanout?

It may just be rain. If it is gray or foul, or the drains are slow, it may be a failing system. Find out which before you open anything.

Rain can pool over a tank or a cleanout from poor grading, a high water table, or a lid or riser that does not seal. That is a drainage fix: regrading and sealing.

If the water smells, looks dark or has toilet paper in it, or if your drains are slow or backing up, sewage may be coming up. That means a full tank, a blocked line or a failing drain field. Keep people and pets away, limit water use and call a septic professional. Do not open the lid yourself.

In either case, keep roof and yard drains pointed away from the tank and field.

Who repairs a leaking underground fire-service line?

The property owner is responsible for the private fire line on the property. The repair involves an excavation crew and the people who test and approve the fire protection system.

A private fire main is designed, installed and tested to NFPA 24. We dig it out, make the repair and restore the site. The connection to the public water system, the backflow assembly and the testing are regulated, and the testing has to be done by someone with the right New Jersey certification.

A fire line that is shut down is out of service, so tell your insurer and the local fire official before the work starts. They may require precautions while the system is down. Plan the shutdown so it is as short as possible.

Can underground utility repairs be completed while a business stays open?

Usually yes. It takes planning around your hours, your customers and your entrances.

The method is to keep the open work small and short, and put the disruptive parts at the quiet times. We did exactly that for a restaurant water main break, starting at 2 am so the business was not interrupted.

Why does a parking lot keep sinking around a catch basin?

Soil is going somewhere. Water is usually carrying it out through a gap in the structure or the pipe, or the backfill around the basin was never compacted well.

Each time it rains, water flows to the basin. If the joints where pipes meet the structure are cracked or open, or if the pipe has failed, water carries fine soil with it into the system. The ground under the pavement is left hollow and the surface drops.

Patching the asphalt over and over only hides it. The cycle continues until the cause is fixed.

We camera the pipes, then excavate around the basin, reseal or replace the connections, rebuild the backfill in compacted layers and restore the pavement.

Can a damaged catch basin be rebuilt without replacing the entire drainage system?

Often yes, if the pipes connected to it are in good shape. A camera inspection tells you before anything is dug.

We look at the basin and run a camera through the pipes. If the pipes are sound, the work is to rebuild the structure: replace the cracked or leaning box, set new risers, a new frame and grate, reseal each pipe connection and bring the surrounding base and pavement back.

If the camera finds the pipes are crushed, offset or full of roots, the better answer may include sections of the pipe. We show you what we find so the decision is yours.

What records should an HOA keep after underground utility work?

Everything that shows what was built, where, and who approved it. The next board will need it, and it can be hard to recreate.

Keep these in a permanent place that passes from one board to the next.

How do you locate a buried water valve or sewer cleanout?

Start with any drawings, then use locating equipment, then probe or hand dig to confirm. 811 will not do it, because these are private.

Old as-built drawings and the previous owner's records come first. Valve boxes and iron fittings can be found with a metal or magnetic locator. Plastic pipes with tracer wire can be traced with a pipe locator. A sewer line can be located by sending a transmitter through it with a camera or a cable.

When we have a likely spot we probe or dig by hand, expose it and then mark it permanently, raising a buried valve or cleanout to grade, and add it to a drawing so nobody has to search for it again.

Can a private water main be repaired without shutting down the entire property?

Often. If the main has isolation valves, we can shut off just the section being repaired. If it does not, adding them is part of the fix.

Planning does most of the work. We find out which buildings the section feeds, schedule the shutoff for a quiet time, notify the tenants and set up temporary water if the outage will be long. Some repairs can be done by stopping flow in the pipe at the work area instead of shutting down the system, depending on the pipe.

A main with no working valves is hard to repair without a full shutdown, and adding valves is one of the best long-term fixes for a property like this.

What causes repeated underground water leaks in an apartment or condo community?

Repeated leaks usually mean the whole system is aging, not that you have had bad luck. Fixing one leak at a time moves the pressure to the next weak spot.

The usual causes are pipe that has reached the end of its life, corrosive soil, high or surging pressure, ground movement, earlier repairs made with poor fittings, and one pipe material changing to another at a joint.

Keep a log of every leak, with date, location and what was found. When the pattern is clear, a plan to replace the worst sections, in a sensible order, costs less than a string of emergency repairs. Checking the pressure on the system is a good place to start.

How do you replace utilities beneath an occupied parking lot?

In phases. Part of the lot is closed and part stays open, and the work is planned so residents and customers can still get in and out.

The lot is divided into work zones. Each zone is dug, piped, backfilled and covered with a temporary surface or steel plates before the next one opens. Signs, barriers and traffic control keep people and cars safe. Notices go out in advance, and access for emergency vehicles and deliveries stays clear.

Where we can avoid cutting the pavement, we bore. Where we cannot, we saw-cut a clean line so the final patch is neat.

What is an as-built utility drawing, and why should a property owner keep one?

It is a drawing of what was actually installed, where, and how deep, made after the work is finished. It is the map the next contractor needs.

A good as-built shows the pipes and conduits with size and material, depth, the valves, cleanouts, bends and connections, and measurements to fixed points like building corners and hydrants. Photos taken before backfill make it better.

Without one, every future dig is a guess, and guesses cause utility strikes, delays and extra charges. It also helps with emergencies, since a valve you can find in a minute is a flood you stop in a minute. Ask for it in the proposal, and put it with the property records.

Should an HOA replace aging underground utilities in phases?

Usually, yes, starting with the sections most likely to fail. Phasing spreads the cost and the disruption, but it needs a plan so each phase fits the whole.

A phased plan works when it is based on facts.