Excavation Contractor Insurance & Bonding
Excavation contractors face exposures that can turn a routine dig into a six-figure claim in minutes. One unmarked gas line. One underground electrical conduit. One fiber optic cable nobody flagged. Utility strikes are the single most catastrophic claim in excavation work - and they happen every day on job sites across the country.
Add heavy equipment operations, OSHA-regulated trench work, fuel spills, contaminated soil disturbance, and the constant risk of cave-in fatalities - and you have a trade where a generic insurance program is not just inadequate, it is dangerous. Most contractors do not find out their coverage has gaps until they are standing in the middle of a claim.
Grit Insurance Group builds excavation contractor insurance programs that actually match the work you do. We understand underground utility exposure, pollution liability, inland marine for heavy iron, and the bonding requirements for public infrastructure projects. If you dig for a living, we know what can go wrong - and we make sure you are covered when it does.
If you are shopping for excavation business insurance, three things decide whether the program actually holds up: whether utility strikes are covered or quietly excluded, how your equipment is scheduled and valued, and whether pollution liability is in the policy or sold separately. Everything else is secondary to those three.
Business Insurance › Contractors › Excavation
What Excavation Contractors Actually Need
Standard contractor insurance policies were not designed for excavation work. The exposures are different. The equipment values are higher. The regulatory requirements are stricter. Here is what actually drives risk and claims for excavation contractors - and what your insurance program needs to address.
Underground Utility Strikes
This is the number one catastrophic exposure for any excavation contractor. Hitting a gas line, water main, fiber optic cable, or electrical conduit during a dig can generate property damage claims, service interruption costs, third-party injury liability, and environmental cleanup expenses - all from a single bucket swing.
Proper locate procedures through 811 and documented pre-dig protocols matter for your claims defense. But locates are not perfect. Lines get mismarked. Old utilities go unrecorded. When a strike happens despite doing everything right, your general liability policy is the backstop. Make sure your GL actually covers underground utility damage - many standard policies restrict or sublimit this exposure.
Environmental and Pollution Exposure
Excavation work creates pollution liability in ways most contractors do not think about until a claim hits. Fuel and hydraulic fluid spills from heavy equipment. Disturbing contaminated soil that was buried before you got to the site. Stormwater runoff carrying sediment into waterways or neighboring properties.
Here is the problem: standard general liability policies almost always exclude pollution. That means a diesel spill from your excavator or a contaminated soil disturbance on a site you did not contaminate can leave you holding the full cleanup cost. Excavation contractors need a standalone contractor pollution liability policy - not a pollution endorsement bolted onto a GL that covers almost nothing.
OSHA Trench Safety Compliance
Trench cave-ins are one of the deadliest hazards in construction. OSHA requires protective systems - sloping, shoring, or trench boxes - for any excavation five feet or deeper. Violations are aggressively enforced, and willful violations carry penalties that can exceed $150,000 per instance.
Beyond the regulatory fines, OSHA violations directly affect your insurability. A serious trench safety citation can spike your workers compensation premiums, increase your experience modification rate (EMR), and make it harder to qualify for projects that require safety prequalification. Consistent OSHA compliance is not just a safety issue - it is a cost-of-doing-business issue that affects every bid you submit.
Bonding for Excavation Contractors
Excavation contractors are often the prime contractor on civil and infrastructure work - water and sewer line installation, road grading, utility trenching, and site preparation for public projects. That means you need bonds.
Most states require a contractor license bond just to operate. But the real bonding need comes when you start bidding public infrastructure work. Federal projects over $150,000 require performance and payment bonds under the Miller Act. State and municipal projects have similar requirements under their own Little Miller Act statutes. If you want to grow into public works - where the money and backlog stability are - you need a bonding program.
Grit helps excavation contractors build and qualify for surety bond programs. We work with your financials, your CPA, and the surety underwriter to get you approved for the capacity you need. Not just a quote - a program that grows with your business.
Written and reviewed by the Grit Insurance Group team · Last reviewed August 12, 2026
Grit is an independent brokerage that places contractor insurance and surety bonds across the 31 states we write in, led by a principal holding the CIC designation with more than 30 years in insurance ownership. We came out of the trades we insure. Coverage and bond requirements are verified against each state's own statutes, rules and agency publications, and they are subject to current state code. Meet the team or call (801) 505-5500.
The Full Excavation Contractor Insurance Program
A real excavation insurance program is not a single policy. It is a coordinated set of coverages that work together to protect your equipment, your crew, your vehicles, and your liability on every job site. Here is what a complete program looks like.
General Liability
General liability is the foundation. For excavation contractors, the critical coverage components are property damage to underground utilities, third-party bodily injury on the job site, and completed operations coverage for site work and underground utility installations you have already finished.
Pay attention to your underground utility strike coverage. Some GL policies sublimit property damage to underground facilities or exclude it entirely. Your agent should confirm that your policy provides adequate limits for utility damage - because one gas line strike on a commercial project can blow through a $100,000 sublimit before the claim adjuster finishes their first phone call.
Workers Compensation
Excavation work falls under class code 6217 - one of the higher-rated classifications in construction. Your crews work in and around open trenches, operate heavy equipment daily, and face struck-by and caught-between hazards constantly. Workers comp premiums for excavation reflect that risk.
Your experience modification rate (EMR) is the single biggest lever you have on workers comp cost. An EMR above 1.0 means you are paying more than average for your classification. It also affects your ability to bid work - many general contractors and project owners will not hire a sub with an EMR above 1.0 or 1.2. We help excavation contractors manage their EMR through loss control, return-to-work programs, and claims management strategy.
Commercial Auto
Excavation contractors run heavy fleets. Dump trucks, lowboy trailers, water trucks, service trucks, and crew vehicles. Your commercial auto policy needs to cover owned vehicles, hired vehicles, and non-owned auto exposure for employees driving personal vehicles on company business.
Dump trucks and equipment haulers carry higher liability limits because of the damage a loaded truck can cause. Make sure your policy covers the full replacement cost of your vehicles and includes Motor Truck Cargo coverage if you haul materials for other contractors or project owners.
Inland Marine and Equipment Coverage
This is the biggest equipment line for any trade in construction. Excavators, backhoes, bulldozers, skid steers, compactors, trenchers, loaders - a single excavation contractor can have $500,000 to $5 million or more in iron on the ground at any given time.
A contractor equipment floater (inland marine policy) covers your machines for theft, vandalism, fire, overturning, collision, and other covered losses - on the job site, in transit, and in your yard. Make sure your schedule is current. Contractors add equipment throughout the year and forget to report it to their agent. An unscheduled machine is an uninsured machine.
Pollution Liability
This is not optional for excavation contractors. Fuel spills from equipment, hydraulic line ruptures, disturbing contaminated soil, sediment discharge into waterways, and stormwater runoff violations all create pollution claims that your general liability policy will not cover.
A standalone contractor pollution liability (CPL) policy fills the gap. It covers both sudden spills and gradual pollution conditions discovered after the fact. If you work on brownfield sites, near water, or on any project with environmental sensitivity, your clients and general contractors may require it as a condition of the subcontract.
Umbrella and Excess Liability
An umbrella policy sits on top of your GL, auto, and employers liability limits. For excavation contractors, umbrella limits of $2 million to $5 million are common - and projects with higher risk profiles may require $10 million or more.
Public works contracts and general contractors frequently specify minimum umbrella limits in their subcontract insurance requirements. A $1 million umbrella may have been enough five years ago. Today, most serious excavation contractors carry $3 million to $5 million in umbrella coverage as a baseline.
How Much Does Excavation Contractor Insurance Cost
There is no single answer because every excavation contractor's risk profile is different. But here are the variables that drive your premium:
- Revenue and payroll - GL and workers comp are both rated on your exposure base. More revenue and more employees means higher premium.
- Equipment values - Your inland marine premium is driven by the total insured value of your scheduled equipment.
- Claims history and EMR - A clean loss run gets you better rates. An EMR above 1.0 increases your workers comp cost and can price you out of projects.
- Type of work - Deep utility trenching carries more risk than surface grading. Your GL rate reflects the work classifications you perform.
- Fleet size and driver records - More trucks and more drivers increase commercial auto premium. MVR violations and at-fault accidents drive rates up further.
- Project locations and contract requirements - Work in congested urban areas or on projects with strict environmental requirements can increase your pollution and GL costs.
A small excavation contractor with $500,000 in revenue might pay $15,000 to $30,000 annually for a basic program. A mid-size operator running $3 million to $5 million in revenue with a heavy equipment fleet can expect $75,000 to $150,000 or more depending on loss history and work mix. The best way to know your actual cost is to get a program review from an agent who understands excavation risk.
Excavation Subcontractor Insurance Requirements
If you work as a subcontractor on commercial or public projects, the general contractor's insurance requirements are not optional. They are a condition of the contract. Here is what most GCs require from excavation subs:
- General liability with $1 million per occurrence and $2 million aggregate - minimum
- The GC, project owner, and sometimes the lender named as additional insured on your GL
- Workers compensation with statutory limits and employers liability of $1 million
- Commercial auto with $1 million combined single limit
- Umbrella of $2 million to $5 million depending on the project
- Waiver of subrogation endorsements on GL, auto, and workers comp
- Certificate of insurance delivered before you mobilize to the site
Failing to meet these requirements means you do not get on the job. We review subcontract insurance requirements for excavation contractors every day and make sure your program meets the specs before you sign.
Why Excavation Contractors Work with Grit
Grit Insurance Group is not a call center. We are an independent brokerage that works with excavation contractors nationally. Here is what that means for your business:
- We know the trade. Underground utility exposure, trench safety, heavy equipment programs, pollution liability - we do not need you to explain your business to us.
- We build the full program. GL, workers comp, auto, equipment, pollution, umbrella, and bonds - all coordinated. No gaps between policies.
- We manage your EMR. If your experience mod is costing you money or costing you bids, we build a plan to bring it down.
- We get you bonded. If you are chasing public infrastructure work, we build your surety program and help you qualify for the capacity you need.
- We fight for you on claims. When a utility strike happens or an employee gets hurt, we are on your side through the entire claims process.
Coverage Excavation Contractors Are Most Often Missing
- XCU: explosion, collapse and underground property damage. Check this first, and note that most write-ups have it backwards. The current ISO form does not exclude the explosion, collapse or underground hazards. The coverage is there until an insurer attaches CG 21 42 or CG 21 43 to take it away, which is common on excavation risks in the surplus lines market. It matters because the excluded definition of underground property damage is written directly at this trade: damage to wires, conduits, pipes, mains, sewers, tanks and tunnels beneath the surface, caused by mechanical equipment used for grading, excavating, drilling, filling, backfilling or pile driving. With that endorsement on, a struck fibre line or a cracked neighbouring foundation is not a covered claim. It is also a bid qualification issue, because public owners and permitting authorities require XCU by name.
- Contractors equipment inland marine, including rented and leased units. General liability pays for damage you do to other people, not for your own machine, and a commercial property policy is built around a building rather than a jobsite. Contractors equipment covers excavators, dozers, skid steers, attachments and trailers where they actually sit, plus theft, fire, vandalism, weather and transit. Get the rented and leased limit right, because rental agreements make you responsible for full replacement cost and often loss of rental income while the unit is down.
- Removal of the subsidence and earth movement exclusion. These exclusions are being applied much more often and are particularly onerous for any operation that moves earth, which is the whole job description. An excavator carrying one has bought a policy that steps aside for the trade's most expensive claim type. It is negotiable rather than fixed: underwriters will usually take it off where the contractor can show routine geotechnical review and no history of subsidence claims.
- Contractors pollution liability as a separate policy. The standard pollution exclusion is restrictive but leaves narrow openings, including for accidental escape of the fuels and hydraulic fluid needed to run mobile equipment. Surplus lines carriers frequently attach a total pollution exclusion that closes them. For excavation the trigger events are ordinary: clipping a fuel or gas line, hitting a buried tank, cutting a sewer lateral, disturbing contaminated soil, or a hydraulic burst into a waterway. Institutional owners scale pollution liability to project size and require it to reach both sudden and non-sudden conditions, which is clear confirmation it is a contract requirement on dirt work rather than an optional add-on.
What Your State Requires, and Who Has To Be Named
Most excavation insurance pages say requirements vary by state and stop there. They vary in ways that decide whether your filing is accepted. Grit verified these against each state's own statutes, rules and agency publications, and every state links through to the full breakdown.
| State | Liability minimum for licensure | Who must be named, and the catch |
|---|---|---|
| Alabama | Proof of current liability insurance, with no dollar minimum published | The Board itself at 445 Dexter Ave must be the certificate holder, and the insured name must match the applicant exactly. The $1,000,000/$2,000,000 figures you will find quoted are not licensing minimums - they come from Division of Construction Management Form C-8 Article 37, which governs state building contracts. Minimum net worth and working capital of $10,000 to license at all. |
| Arizona | None. A license bond instead, $2,500 to $100,000 by classification and volume | The ROC takes no insurance filing whatsoever. Residential contractors additionally pay into the Residential Recovery Fund or post a second bond of $200,000. Bond amount steps with contemplated gross volume, so growing past a threshold means raising the bond. |
| California | None for most licensees. LLCs: $1,000,000 cumulative, rising $100,000 per person of record above five, capped at $5,000,000 | B&P 7071.19, and the policy must come from an admitted California insurer or an approved surplus lines carrier. Every licensee posts a $25,000 bond; LLCs add a $100,000 employee bond. C-8 concrete, C-20 HVAC, C-22 asbestos, C-39 roofing and C-61/D-49 tree service must carry workers comp even with zero employees. |
| Colorado | GL $1,000,000 per occurrence and $2,000,000 aggregate at PPRBD; Fort Collins $2,000,000 aggregate | There is no statewide license, so this is municipal. A lapse suspends the license automatically at PPRBD, and Fort Collins keeps a license current only while bond and insurance are. One PPRBD filing covers nine jurisdictions. |
| Georgia | GL $300,000 residential-basic, $500,000 light commercial and commercial | The Board in Macon as certificate holder. Binders, information pages, policies and declaration pages are all refused - it must be a signed certificate, and an individual applicant must be the named insured, not their company. Workers comp at three or more employees. |
| Idaho | GL $300,000 single limit, including products and completed operations | From an Idaho-authorized insurer. A floor set in 2006 and never raised, so treat it as the registration minimum rather than the coverage decision. No bond at all. |
| Illinois | Roofing: $250,000 property damage and $500,000 bodily injury, each occurrence | The license is cancelled without a hearing on the termination date of your bond, and on proof that insurance lapsed. No grace period. The amounts live in the rule at 68 Ill. Adm. Code 1460.20, not in the statute that most pages cite. |
| Kansas | Roofing registration: a liability certificate of not less than $500,000 | K.S.A. 50-6,125, and it is filed with the Attorney General rather than a licensing board, which is why roofers looking for a contractor board never find it. Kansas licenses no general contractors, so roofing carries the only statewide insurance minimum. Cities license separately. |
| Louisiana | GL $100,000 residential and home improvement, $50,000 mold remediation | A liability trust fund at the same amount is accepted instead of a policy. Commercial applicants file no insurance certificate at all. Workers comp required alongside. |
| Maine | None required for licensure | Maine licenses no general contractors at all. It regulates the contract instead, and a home construction contract over $3,000 must be written, with the down payment capped at one third of the price. |
| Michigan | None required for licensure | The widely quoted $100,000 figure is not in the law, and the statute it is cited to is about an unlicensed builder being unable to sue for payment. Nothing filters your competitors, so your own certificates carry the whole burden. |
| Mississippi | GL $300,000 per occurrence and $600,000 aggregate | MSBOC as certificate holder, and the insured name must match the license name exactly. Workers comp at five or more employees. A Certificate of Responsibility holder must also disclose to the owner at signing whether they carry GL, in type larger than the rest of the contract. |
| Missouri | Statewide electrical license: $500,000 liability | And a bond posted with every political subdivision you work in. The state license removes local exams, never local bonds. Outside electrical there is no state license and no state minimum. |
| Montana | Montana-issued workers compensation | Montana does not accept another state's workers comp in construction. Your home-state policy does not travel, and contractors from Idaho, Wyoming and the Dakotas discover it after winning the job. |
| Nebraska | Workers compensation only, on an ACORD 25 | Department of Labor as certificate holder. If the coverage lapses you are removed from the registered contractor list until your agent files a current certificate. |
| Nevada | No GL minimum. Workers compensation is a condition of licensure | Industrial insurance compliance, or a signed exemption affidavit, must be on file to issue a license, to activate an inactive one, and to renew. An active license without comp on file is not a valid license. The license bond scales with your limit, and the Residential Recovery Fund covers homeowners in place of a GL mandate. |
| New Hampshire | None. No state general contractor license exists | Only electricians and plumbers are licensed statewide, so there is no board to file a certificate with. Requirements come from municipalities and from the owners and general contractors who hire you, which in practice means the contract sets your limits. |
| New Mexico | No general liability minimum in the rule | But workers comp compliance is a condition of license validity under Section 60-13-23, so a comp failure invalidates the license. Every license also carries a $10,000 bond, and it is a code bond rather than a contract bond. |
| North Carolina | None. The Board states there is no insurance requirement for licensing | Financial responsibility instead: working capital of $17,000 limited, $75,000 intermediate, $150,000 unlimited. A surety bond substitutes for the working capital entirely at $175,000, $500,000 and $1,000,000. Workers comp is still North Carolina law, it is simply not a license condition. |
| North Dakota | A liability certificate naming the Secretary of State as certificate holder | Plus Workforce Safety and Insurance verification. No dollar minimum is published, so the certificate itself is the requirement. |
| Ohio | $500,000 contractor liability insurance | Must sit in one contracting company name. The figure is set by the licensing board and published on its application, not fixed in the Revised Code, so confirm it at renewal rather than assuming last year's number. |
| Oklahoma | $50,000 GL per plumbing, electrical or mechanical license | CIB as certificate holder, and both the bond and the certificate must be in the individual license holder's name, not the company's. $50,000 is far too low for real commercial MEP work - meeting the minimum and stopping is the exposure. |
| Oregon | Scaled to your endorsement: residential $100,000 to $500,000 per occurrence, commercial $500,000 per occurrence to $2,000,000 aggregate | The CCB pairs every bond amount with an insurance amount, so the two move together. Hold both a residential and a commercial endorsement and you file two bonds but one policy, written at the higher of the two amounts. Commercial General Contractor Level 1 is an $80,000 bond with $2,000,000 aggregate; a number of surety sites publish $75,000 for it, which is out of date. |
| Pennsylvania | $50,000 personal injury and $50,000 property damage | HICPA registration through the Attorney General, required of anyone doing more than $5,000 of home improvement work a year. Registration is not a license - no exam, no financials, no experience - but your PA number must appear on every advertisement, contract, estimate and proposal, and non-compliance can make the contract unenforceable. |
| South Carolina | None for general or mechanical contractor licensure. Alarm and fire sprinkler registrations: $100,000 | That $100,000 gets quoted as though it covers every South Carolina contractor. It does not. GC and MC licensure runs on financials or a bond: Group 1 is a $20,000 bond for a $100,000 job limit, through Group 5 at $350,000 for unlimited. The bond is a full substitute for the CPA financial statement. |
| Tennessee | GL scaled to your monetary limit, plus workers comp unless exempt | The board publishes the schedule separately from the statute, so confirm the tier that applies to your limit rather than assuming. New since July 1, 2026: a bond of at least 50% of your monetary limit can replace the CPA-reviewed or audited financial statement entirely. Monetary limit is 10 times the lesser of working capital or net worth. |
| Texas | Air conditioning and refrigeration: Class A $300,000 per occurrence and $600,000 aggregate; Class B $100,000 and $200,000 | No state general contractor license exists, so most trades face no state insurance minimum at all. The licensed trades do, and TDLR will not issue without it. |
| Utah | GL $1,000,000 per incident and $2,000,000 total | DOPL as certificate holder, plus workers comp or a Labor Commission waiver. Raised from $100,000/$300,000 effective April 20, 2026. The $3,000,000 aggregate you may have read about was the original proposal and was pulled back. |
| Virginia | None. Class A and B document net worth or equity instead: $45,000 and $15,000 | A financial statement, a CPA review or audit, or a surety bond on the Board's own form - any one of the three satisfies it. Class C has no financial threshold at all. Third-party sites publish per-class GL minimums for Virginia that appear nowhere in DPOR's application or instructions. |
| Washington | GL $200,000 public liability plus $50,000 property damage, or $250,000 combined single limit | L&I as certificate holder. Washington runs a monopolistic workers comp system, so comp comes from the State Fund and never from a private carrier. Specialty contractors also post a $15,000 bond, general contractors $30,000. |
| Wyoming | None. No state contractor license exists | Cities and counties license instead, so the requirement changes by jurisdiction rather than at the state line. Casper, Cheyenne and Laramie each run their own program. Plan coverage around the owner's contract, because no state floor is going to set it for you. |
Three patterns travel to any state you work in. A lapse is a licensing event, not just an insurance one, and several states suspend or de-register automatically with no hearing. The certificate holder is state-specific, so naming the wrong entity gets the filing rejected even when the coverage is right. And in a growing number of states a surety bond is an accepted substitute for the financial statement - North Carolina, South Carolina, Virginia and, since July 2026, Tennessee all let a bond stand in place of CPA-prepared financials or a working capital test. That turns a bond into a way to qualify for a license, not just a box to check after you have one.
Grit verified every row above in all 31 states we write in, from each state's own statutes, rules and agency publications rather than from other insurance blogs. Several of the figures circulating online are misattributed - Alabama's are lifted from a state construction contract form, South Carolina's from a specialty registration, and Virginia's do not exist. Call (801) 505-5500 and we will confirm what your state actually requires before you file.
Frequently Asked Questions
What insurance does an excavation contractor need?
A complete excavation contractor insurance program includes general liability, workers compensation, commercial auto, inland marine (equipment coverage), pollution liability, and umbrella or excess liability. Most excavation contractors also need surety bonds - license bonds to operate and performance bonds to bid public work. The exact coverages and limits depend on your revenue, crew size, equipment values, and the types of projects you perform.
How much does excavation contractor insurance cost?
Cost depends on your revenue, payroll, equipment values, claims history, EMR, fleet size, and the type of excavation work you perform. A small operator might pay $15,000 to $30,000 per year. A mid-size excavation contractor running $3 million to $5 million in revenue can expect $75,000 to $150,000 or more annually. The only way to get an accurate number is a full program review based on your specific operations.
Do excavation contractors need a bond?
Yes, in most cases. Most states require a contractor license bond to hold an excavation or general engineering license. Beyond that, if you bid on public infrastructure projects - water lines, sewer systems, road work, utility installation - you will need bid bonds, performance bonds, and payment bonds. Federal projects over $150,000 require bonds under the Miller Act. State and local projects have similar requirements.
What workers comp class code applies to excavation?
The primary workers compensation class code for excavation contractors is 6217 - Excavation and Drivers. This classification covers employees performing excavation, trenching, grading, and related site work, as well as drivers of excavation equipment. Some states use modified codes, and if your company performs multiple types of work, employees may be split across different class codes based on their actual duties.
Does excavation insurance cover underground utility strikes?
General liability policies can cover underground utility strikes, but coverage varies significantly between carriers and policy forms. Some policies provide full coverage for property damage to underground facilities. Others sublimit it, exclude it, or require a separate endorsement. This is one of the most important coverage questions for any excavation contractor - your agent should confirm in writing exactly how your policy handles underground utility damage before you start any project.
Do I need pollution liability for excavation work?
Yes. Standard general liability policies exclude pollution in almost all cases. Excavation contractors face pollution exposure from fuel and hydraulic fluid spills, disturbing contaminated soil, and stormwater sediment runoff. A standalone contractor pollution liability (CPL) policy is the only reliable way to cover these exposures. Many general contractors and project owners now require pollution liability as a condition of the subcontract, especially on environmental, utility, and infrastructure projects.
Can I get bonded for public infrastructure work?
Yes. Grit Insurance Group helps excavation contractors build surety bond programs for public infrastructure projects - water and sewer, road and highway, utility installation, and site development. We work with your financials, your CPA, and surety underwriters to get you approved for bid bonds, performance bonds, and payment bonds at the capacity levels you need to compete. If you have been told you cannot get bonded, call us. Our job is to find the path to yes.
I called 811 and the line was still in the wrong place. Am I on the hook?
Calling does not move the risk by itself, and the answer turns on the tolerance zone. Industry best practice sets that zone at the width of the facility plus 18 inches on either side, and states can require more. Inside it you are expected to expose the line by pot holing, hand digging, soft digging or vacuum excavation rather than with a bucket. Utah's dig law shows how the split works: the excavator is liable for the utility's damage when the utility did its marking duty and the hit happened inside the tolerance zone, so if the mark was genuinely wrong that condition is not met. Note the trap in that same statute. Doing everything right protects you from the statutory civil penalty, which is not the same as walking away from the repair bill, and if you find a line unmarked or mismarked you are expected to stop work in that area and notify the owner before continuing.
Does my general liability policy already cover hitting a buried line?
Probably, but only until an insurer takes it away, and plenty of published guidance has this backwards. The current ISO general liability form does not exclude explosion, collapse or underground property damage. An insurer has to attach an endorsement, CG 21 42 or CG 21 43, to strip those hazards out, and that is common on excavation accounts written in the surplus lines market. Ask your agent directly whether either form is on your policy. While they are looking, have them check for a subsidence or earth movement exclusion and a total pollution exclusion, because both are aimed at exactly what you do for a living. A certificate showing one million dollars tells you nothing about which of these endorsements sits behind it.
Why is my workers comp so much higher than the framer down the street?
Because the class code carries the rate, and the codes for dirt and utility work sit in high hazard groups. Wisconsin is one of the few states that publishes actual rates rather than loss costs, and for the year beginning October 2025 it set excavation at $3.770 per $100 of payroll and sewer construction at $5.370. Same crew, same trucks, different code, and a real difference on a real payroll. Two things follow. First, make sure your payroll is landing in the right code, because the excavation class specifically excludes grading and excavation tied to street or road construction, and that split gets missed at audit. Second, the published rate is only the starting point. Your experience modification factor, and any schedule credit your broker can argue for, is what actually decides the number, which is why a documented trench safety programme and a named competent person pay for themselves.
Get Your Excavation Insurance Program Reviewed
If you are running an excavation company and your insurance program has not been reviewed by someone who understands your trade, you are probably overpaying, underinsured, or both. Grit Insurance Group works with excavation contractors across the country. Call us at (801) 505-5500 or request a quote online. If you need bonds for public work, take the Bond Scorecard to see where you stand.
