Summer Projects That Require Utility Locating Before You Dig
Summer is prime time for outdoor projects.
Homeowners install fences, build decks, improve drainage, plant trees, replace driveways, and finally tackle the landscaping projects they have been putting off. Contractors are also busier, taking advantage of longer days and better ground conditions.
But many summer projects have one thing in common:
They involve digging.
Even a relatively small hole can become dangerous and expensive if you do not know what is buried underneath it.
Underground utilities may include:
- Electric lines
- Natural gas or propane lines
- Water service lines
- Sewer or septic piping
- Internet, cable, and telephone lines
- Irrigation systems
- Landscape lighting
- Privately installed utilities
Before starting any project that disturbs the ground, utility locating should be one of your first steps—not something you think about after the equipment arrives.
In this article, we will explain which common summer projects require locating, what public utility marking does and does not cover, and when a more detailed private utility assessment may be necessary.
Why Is Utility Locating Important?
Utility locating helps identify the approximate location of underground lines before digging begins.
Without that information, you could accidentally:
- Interrupt electrical service
- Damage a gas line
- Break a water service
- Crush or cut a sewer pipe
- Disconnect internet or cable service
- Cause sewage to back up
- Create a serious injury risk
- Become responsible for costly repairs
Even experienced contractors cannot reliably determine where every underground line is located just by looking at the property.
Old homes, additions, detached buildings, previous repairs, and undocumented installations can make underground systems especially difficult to predict.
The safest assumption is simple:
If the ground will be disturbed, something may be buried there.
10 Summer Projects That May Require Utility Locating
1. Installing A Fence
Fence installation requires multiple post holes, often around the perimeter of a property.
Those holes may seem small, but they can still intersect with:
- Electric service lines
- Water services
- Sewer laterals
- Communication lines
- Irrigation piping
- Underground dog fences
- Landscape lighting
Fence lines commonly run near property boundaries, which may also be where utilities enter or cross the property.
Do not assume that a shallow fence post will stay above every utility. Burial depths can vary, and ground levels may have changed since a utility was installed.
2. Building a Deck, Porch, or Pergola
Decks, porches, pergolas, and covered patios often require footings or concrete piers.
Depending on the structure, those holes may extend several feet into the ground.
This creates a potential conflict with water, sewer, gas, electrical, or communication lines running near the house.
The risk may be higher when building near:
- A basement wall
- A utility entrance
- A meter
- A septic tank
- A sewer cleanout
- An electrical panel
- A detached garage or workshop
Finding underground lines before finalizing the layout may also allow the structure to be repositioned instead of forcing a costly utility relocation.
3. Planting Trees or Large Shrubs
A new tree may start with a relatively small root ball, but the planting hole can still be wide and deep enough to damage underground piping.
Tree planting should be carefully planned around:
- Sewer lines
- Septic tanks
- Drainfields
- Water services
- Irrigation lines
- Electrical utilities
There is also a long-term concern.
As trees mature, their roots may spread toward areas with moisture, including leaking sewer joints, cracked pipes, and drainfield components.
Locating utilities before planting helps protect the buried lines today and reduces the risk of root-related problems in the future.
Also, checkout this blog explaining how tree roots can reek havoc on your plumbing.
4. Installing a Pool or Hot Tub
Above-ground and in-ground pools can involve substantial excavation, grading, trenching, electrical work, and plumbing.
Hot tubs may also require:
- A concrete pad
- New electrical service
- Drainage improvements
- Water piping
- Landscaping around the installation
A pool contractor may need to know more than where public utilities are located. Private water lines, sewer pipes, septic components, and electrical feeds to outbuildings may also affect where the pool can safely be installed.
This is one project where learning about underground conflicts late in the process can become extremely expensive.
5. Installing a Patio, Walkway, or Retaining Wall
Patios and walkways may require excavation for stone, gravel, drainage, edging, or concrete.
Retaining walls can require even more extensive digging, especially when they include:
- Deep footings
- Reinforcement
- Drainage stone
- Perforated drainpipe
- Tiebacks or anchors
These projects may cross sewer, water, electrical, or drainage lines.
They can also create future access problems.
For example, pouring a concrete patio directly over a deteriorating sewer line may not damage the pipe during construction, but it could make a future repair much more disruptive and expensive.
Knowing where underground pipes are located can help you avoid building permanent improvements directly over problem areas.
6. Replacing or Expanding a Driveway
Driveway projects often involve grading, excavation, compaction, drainage improvements, or the removal of existing asphalt or concrete.
Underground utilities may cross beneath the driveway as they travel from the road to the house.
This may include:
- Water service lines
- Sewer laterals
- Natural gas lines
- Electric lines
- Cable or internet lines
Heavy equipment can also affect shallow or already compromised pipes.
A deteriorated Orangeburg, clay, cast-iron, or thin-wall plastic pipe may be more vulnerable to movement, crushing, or collapse during construction.
Before investing in a new driveway, it may be worth confirming the location and condition of the lines beneath it.
Otherwise, you could finish the new surface only to tear it back out later for a pipe repair.
7. Improving Yard Drainage
Summer storms often reveal drainage problems around homes.
Common improvements include:
- French drains
- Catch basins
- Downspout extensions
- Swales
- Curtain drains
- Yard drains
- Sump pump discharge lines
These systems require trenches that may cross existing utilities.
Drainage work near the foundation may also encounter water services, sewer pipes, electrical lines, or previously installed drains.
Drainage contractors should understand what is underground before choosing the route and depth of the new system.
It is also important to determine whether the water problem is actually surface drainage—or whether a broken underground water or sewer line may be contributing to the wet area.
8. Installing an Irrigation System
Irrigation systems require multiple trenches throughout the yard.
Although irrigation piping is usually installed relatively shallow, the trencher can still damage other underground systems.
Potential conflicts include:
- Communication cables
- Landscape lighting
- Electrical lines
- Water services
- Sewer cleanouts
- Septic lines
- Existing drainage systems
Because irrigation trenches cover such a large portion of the property, locating should be completed before the contractor begins routing the zones.
9. Installing a Shed, Garage, or Other Outbuilding
A shed may only require blocks or a gravel pad, but larger structures can involve deeper excavation, concrete foundations, electrical service, plumbing, or drainage.
If utilities will be extended to the building, additional trenches may be needed for:
- Water
- Sewer
- Electric
- Internet
- Gas or propane
Locating the existing utilities helps determine the safest route for the new ones.
It can also prevent the building from being placed over a septic tank, drainfield, sewer lateral, or another area that may need future access.
10. Excavating for Plumbing or Septic Work
Many underground plumbing projects obviously involve digging, but locating is still essential before excavation begins.
This includes work involving:
- Sewer line replacement
- Water service replacement
- Septic system repairs
- New cleanouts
- Distribution box replacement
- Drainfield work
- Underground pipe assessments
- Traditional excavation
- Trenchless pipe replacement access pits
Even when the pipe being repaired is already known, other utilities may cross above, below, or beside it.
The excavation plan should account for all buried infrastructure—not just the pipe receiving the repair.
Does Calling 811 Locate Every Underground Line?
No.
This is one of the most important things homeowners and contractors need to understand.
Calling 811 is an essential first step before digging. The request notifies participating utility companies so that their underground facilities can be marked.
However, public utility locating generally covers utilities owned or maintained by participating utility providers.
It may not include privately owned lines located beyond the utility’s responsibility point.
Depending on the property, unmarked private lines could include:
- The sewer lateral between the home and public main
- Private water piping
- Septic system components
- Electric lines to sheds, garages, barns, gates, or well pumps
- Propane lines
- Irrigation systems
- Landscape lighting
- Pool equipment lines
- Private communication cables
- Privately installed drainage piping
A property can therefore have a completed public utility locate and still contain unmarked underground lines.
What Is Private Utility Locating?
Private utility locating is used to identify underground infrastructure that may not be covered through the public 811 process.
The exact locating method depends on the type of line, pipe material, access points, and site conditions.
Some lines can be located by applying a signal to a conductive pipe or tracer wire. Sewer and drain lines may sometimes be located by inserting a camera, sonde, or transmitter into the piping.
However, not every buried line can be traced easily.
For example:
- Plastic piping may not have tracer wire.
- Some lines may be inaccessible.
- Damaged pipes may prevent equipment from passing.
- Old installations may take unexpected routes.
- Multiple nearby utilities can interfere with signals.
- The pipe may be too deep or outside the equipment’s reliable range.
A utility mark should be treated as an informed location—not permission to excavate carelessly directly on top of it.
How Far in Advance Should Utility Locating Be Scheduled?
Do not wait until the morning excavation is scheduled to begin.
Locating should be included during the planning stage, especially when the results could affect:
- The project layout
- Permit drawings
- Excavation routes
- Material quantities
- Equipment access
- Contractor pricing
- Drainage design
- Foundation placement
You should also leave time to address unclear or conflicting marks.
If a sewer line appears to run directly beneath the proposed pool or patio, you may need time to inspect the pipe, modify the design, or discuss relocation and replacement options.
Who Is Responsible for Making Sure Utilities Are Located?
Responsibility can depend on the project, contractor agreement, and local requirements.
Do not assume that someone else has handled it.
Before excavation begins, ask:
- Has 811 been contacted?
- Which utilities were marked?
- Were there any “no response” or unclear markings?
- Are there private utilities on the property?
- Who is responsible for identifying those private lines?
- Does the contractor know where the sewer, septic, water, and electrical lines are located?
- Will the marked area remain visible throughout the project?
Getting clear answers before digging is far easier than sorting out responsibility after a utility is damaged.
Common Warning Signs of Underground Utilities
Visible property features may offer clues about what is buried below, including:
- Water meters
- Gas meters
- Electric meters
- Utility poles
- Sewer cleanouts
- Septic tank lids
- Well heads
- Irrigation valve boxes
- Utility pedestals
- Downspout drains
- Sump pump discharge outlets
- Outdoor electrical panels
- Propane tanks
However, these features do not always reveal the exact path of the buried line.
Underground utilities do not necessarily run in perfectly straight lines. Repairs, additions, landscaping changes, and previous construction may have altered their routes.
Use visible clues to ask better questions—not as a substitute for locating.
What Should You Do Before Starting a Summer Digging Project?
Before breaking ground:
- Identify every area where excavation will occur.
- Contact 811 before digging.
- Wait for the required utility responses and markings.
- Consider privately owned utilities that may not be included.
- Determine whether sewer, water, septic, drainage, or electrical lines cross the project area.
- Consider a camera inspection if you are building over an older or questionable sewer line.
- Discuss utility conflicts with the contractor before finalizing the project layout.
- Use appropriate care when digging near marked lines.
The goal is not simply to avoid a line on the first day of excavation.
The goal is to make sure your new project does not damage, cover, restrict access to, or create future problems for the underground systems serving your property.
Planning a summer project in the Roanoke Valley, New River Valley, or surrounding areas? Contact Skiwi to discuss whether an underground pipe assessment makes sense before you dig.
