Bonds and insurance limits on a utility vegetation contract
Civil Code section 9550 requires a payment bond on a public works contract over $25,000, and section 9554 fixes it at 100 percent of the contract. Bidder's security is 10 percent. Performance bonds, liability limits and endorsements come from the solicitation, so they change from one buyer to the next.
Two pieces of paper decide whether a crew can start: a surety bond and a certificate of insurance. On a California public works contract exactly one number on those two documents is fixed by statute. Every other number is written by the buyer, in the solicitation, and it changes from one buyer to the next.
The City of Healdsburg opened bids on an electric line clearance contract on April 28, 2026, under solicitation IFB-05-026. That package is the worked example below, because it carries the bond forms, the insurance exhibit and the bid results in one place.
Only one of these bonds comes from a statute
Civil Code section 9550 sets the floor:
A direct contractor that is awarded a public works contract involving an expenditure in excess of twenty-five thousand dollars ($25,000) shall, before commencement of work, give a payment bond to and approved by the officer or public entity by whom the contract was awarded.
Section 9554 fixes the amount at "not less than 100 percent of the total amount payable pursuant to the public works contract." It closes two side doors in the same subdivision. The instrument has to be a bond rather than a deposit in lieu of one. It has to be executed by an admitted surety insurer, which Code of Civil Procedure section 995.120 defines as an insurer holding a certificate of authority from the Insurance Commissioner to transact surety insurance in this state.
The performance bond has no equivalent. For cities, Article 4 of the public works bidding provisions runs from section 20160 to section 20175 and deals with bidder's security, forfeiture and award. It never requires a faithful performance bond. Counties do carry one, at section 20129(b): "The person to whom the contract is awarded shall execute a bond to be approved by the board for the faithful performance of the contract." Outside that, a performance bond exists because the solicitation put one there.
Four instruments can appear on the same vegetation contract, and they answer to different masters.
Instrument | Amount | Authority | Who it pays |
Bidder's security | At least 10 percent of the bid | The agency, if the low bidder walks away | |
Payment bond | 100 percent of the contract | Civil Code 9550 and 9554 | Subs, suppliers and laborers listed in Civil Code 9100(a) |
Performance bond | Whatever the solicitation says, commonly 100 percent | The contract documents | The agency |
Contractor's license bond | $25,000 | The beneficiaries listed in B&P 7071.5 |
Healdsburg required the first three. Section 5 of Exhibit F to its draft contract calls for a construction performance bond and a construction labor and material payment bond. It sets the performance bond "in the amount of one hundred percent of the amount payable by the terms of the Project contract." Its payment bond form recites Civil Code sections 9550 and 9554 by number.
Whether the statute reached that contract at all is a fair question, and the answer is not in the statute. Civil Code section 9000 applies the payment bond title "to a work of improvement contracted for by a public entity." Section 8050 then defines a work of improvement through a list that names buildings, wharves, bridges, ditches, flumes, aqueducts, wells, tunnels, fences, machinery, railroads, roads, landscape planting and grading.
Pruning a conductor span is on none of those lines. Public Contract Code section 1101 is no more help, defining a public works contract as an agreement for "the erection, construction, alteration, repair, or improvement of any public structure, building, road, or other public improvement of any kind."
The awarding body settles it, and section 9550(b) is where. The public entity "shall state in its call for bids that a payment bond is required." Healdsburg stated it and attached the form. The City of San Bruno's 2022 tree pruning RFP required a performance bond for 100 percent of the contract amount and carried no payment bond form anywhere in the package. A second tier sub on that four year contract had no payment bond to claim against.
What the bidder's security buys, and what forfeits it
Section 20170 allows four forms of bidder's security on a city public works bid.
Cash.
A cashier's check made payable to the city.
A certified check made payable to the city.
A bidder's bond executed by an admitted surety insurer, made payable to the city.
Section 20171 puts the amount at "at least 10 percent of the amount bid," and adds that "a bid shall not be considered unless one of the forms of bidder's security is enclosed with it." Healdsburg cites section 20170 by number in its invitation and requires its own bidder's bond form.
The arithmetic matters on the day the low bidder gets cold feet. Section 20172 forfeits the security when the successful bidder fails to execute the contract. Section 20174 then lets the council award to the second lowest responsible bidder and spends the forfeited security on the gap:
the amount of the lowest bidder's security shall be applied by the city to the difference between the low bid and the second lowest bid, and the surplus, if any, shall be returned to the lowest bidder if cash or a check is used, or to the surety on the bidder's bond if a bond is used.
Healdsburg's bid summary records three base bids on April 28, 2026: $166,699.00, $174,899.00 and $225,000.00. Ten percent of the low bid is $16,669.90 of security. Had that bidder declined to sign and the city moved to the second bid, the city would keep $8,200.00, the difference between the two, and the balance of $8,469.90 would go back to the surety. Forfeiture is capped by the gap, not by the security.
The payment bond pays a list, and the list runs on a clock
The bond pays a defined list. Healdsburg's payment bond form binds principal and surety "unto all laborers, material men, and all other persons named in California Civil Code Section 9100 (a)." That statutory list has three entries: a person that furnished work authorized for the project, a laborer, and a person described in Public Contract Code section 4107.7. Section 9100(b) puts the direct contractor outside both the stop payment notice and the bond claim. A prime chasing the agency for its own money looks elsewhere.
Two deadlines govern a sub's claim, and both are counted from the job rather than from the invoice.
Step | Deadline | Authority |
Preliminary notice, or written notice to surety and principal instead | 15 days after a recorded notice of completion, 75 days if none was recorded | |
Stop payment notice window closes | 30 days after a recorded notice of completion, acceptance or cessation, 90 days if none was recorded | |
Last day to sue on the bond | Six months after that window closes |
A brush disposal sub that never sent a preliminary notice still has a route under section 9560(b), and it is a short one. On a grid where the city records a notice of completion, that route is open for 15 days.
The license bond stops at seven thousand five hundred dollars
The $25,000 contractor's bond that rides with a C-49 license is often read as project security. Business and Professions Code section 7071.6(b) says otherwise:
Excluding the claims brought by the beneficiaries specified in subdivision (a) of Section 7071.5, the aggregate liability of a surety on claims brought against a bond required by this section shall not exceed the sum of seven thousand five hundred dollars ($7,500).
Subdivision (a) of section 7071.5 is the homeowner doing home improvement on a personal family residence. Everyone else, including an unpaid employee and a damaged property owner on a utility right-of-way, shares an aggregate of $7,500 for the life of that bond. A utility or an agency reading a license bond as security for a $166,699.00 contract is reading a $7,500 ceiling.
What one line clearance contract asks for in limits
Exhibit C of Healdsburg's draft contract sets the floor for the work itself. San Bruno's tree pruning RFP sets a different one for street trees with no conductor in the picture. Pacific Gas and Electric Company publishes a third figure, and that one is the gate to being a supplier at all rather than a term of any contract.
Coverage | Healdsburg IFB-05-026 | San Bruno tree pruning RFP | PG&E prospective supplier minimum |
Commercial general liability | $2,000,000 per occurrence | $2,000,000 per occurrence, $4,000,000 aggregate | $1,000,000 |
Business auto liability | $2,000,000 combined single limit | $2,000,000 each accident | $1,000,000 |
Workers' compensation | Statutory | As required by the State of California | $1,000,000 |
Employer's liability | $1,000,000 per occurrence | $2,000,000 per accident | Not stated |
The aggregate is the figure that gets skipped. Healdsburg requires that where a general aggregate applies, "either the general aggregate limit shall apply separately to this project/location (ISO CG 25 03 or 25 04) or the general aggregate limit shall be twice the required occurrence limit." A contractor running eight utility contracts off one $2,000,000 occurrence and $2,000,000 aggregate policy fails that sentence, and the fix is an endorsement rather than a higher limit.
Both cities set a carrier quality bar of A.M. Best A:VII. Both require 30 days of written notice before cancellation or reduction. San Bruno additionally requires a maintenance and warranty bond "valued at ten percent (10%) of the maximum amount of compensation" after the work is accepted, which is a bond that outlives the last closed unit.
On investor owned utility work these numbers live in an exhibit incorporated by reference, and the exhibit ranks above the statement of work. How that document stack is ordered decides which limit governs when two of them disagree.
The certificate is information and the endorsement is the coverage
The ACORD 25 form settles this in its own header, printed above the coverage grid on every certificate ever issued:
THIS CERTIFICATE IS ISSUED AS A MATTER OF INFORMATION ONLY AND CONFERS NO RIGHTS UPON THE CERTIFICATE HOLDER. ... IMPORTANT: If the certificate holder is an ADDITIONAL INSURED, the policy(ies) must be endorsed. If SUBROGATION IS WAIVED, subject to the terms and conditions of the policy, certain policies may require an endorsement. A statement on this certificate does not confer rights to the certificate holder in lieu of such endorsement(s).
A check mark in the ADDL INSD column proves that somebody checked a box. The endorsement behind it is a separate document with its own form number. The California Intergovernmental Risk Authority's published guide sorts the common ones by what they do.
Form | What it does |
CG 20 10 | Additional insured, ongoing operations |
CG 20 37 | Additional insured, completed operations |
CG 20 01 | Primary and noncontributory |
CG 24 04 | Waiver of subrogation, general liability |
WC 00 03 13 | Waiver of subrogation, workers' compensation |
Edition dates are where a vegetation contract gets interesting. Healdsburg requires that "any endorsements must be at least as broad as Insurance Services Office form number CG2010 (Ed. 11/85)." The 1985 edition of CG 20 10 reached completed operations and used the words "arising out of." Every edition after 2004 narrowed both. A tree that fails eleven months after the pruning is a completed operations claim, so a contractor holding a current CG 20 10 04 13 and nothing else has met the certificate and missed the clause.
Who decides is written into the same exhibit. Healdsburg reserves the right to "approve a variation in the foregoing insurance requirements, upon a determination that the coverages, scope, limits, and forms of such insurance are either not commercially available, or that the City interests are otherwise fully protected."
That determination belongs to the city, in writing, before the work starts. The time to ask for it is during the question period, not after a certificate is rejected. Safety platforms treat the same certificate as a pass or fail gate, which is why an expired one can hold an F against an otherwise clean record.
Workers' compensation is a signature before it is a certificate
Labor Code section 1861 asks for a sentence in the contractor's own hand, filed with the awarding body before the work begins:
I am aware of the provisions of Section 3700 of the Labor Code which require every employer to be insured against liability for workers' compensation or to undertake self-insurance in accordance with the provisions of that code, and I will comply with such provisions before commencing the performance of the work of this contract.
That certification is a separate obligation from the certificate of insurance and from the DIR registration a public works bidder carries under Labor Code section 1725.5. Three documents, three filings, one crew.
The employer's liability line underneath it is the one that answers when a comp claim turns into a suit. Healdsburg asks for $1,000,000 per occurrence and requires the policy to "waive all rights of subrogation against the City and its officials, officers, employees, agents and volunteers." That waiver is the WC 00 03 13 endorsement, and it has to be issued before the loss.
Three exposures on a vegetation contract the liability policy was not written for
Herbicide. Right-of-way spraying is its own licensed trade. Title 3 CCR section 6530(c) establishes Category C, Right-of-Way Pest Control, covering "the maintenance of rights-of-way, including but not limited to roadsides, power lines, telephone lines, pipelines, canals, and railways."
Section 6524 of the same chapter then sets the Department of Pesticide Regulation's financial responsibility floor for a ground rig business at $100,000/$300,000/$50,000, filed on form DPR-PML-052, or a $75,000 certificate of deposit, or a surety bond. That floor is a licensing condition sized for chemical bodily injury and chemical property damage. It sits two orders of magnitude below the $2,000,000 a utility contract asks for, and the general liability policy covering the pruning may carry a pollution exclusion that answers neither.
Aircraft. Helicopter saw and aerial patrol sit outside the general liability form. The County of Sonoma's published contract guidance states the position plainly: "Although the GL excludes direct coverage for ownership, maintenance and use of aircraft and watercraft, it does cover contractual liability insurance for aircraft and watercraft." The operator's aviation policy is the one that responds, and the county notes that most aircraft policies carry no contractual liability coverage at all.
Professional opinion. A tree risk assessment, a species inventory or a signed recommendation to retain a leaner is advice, and advice claims run to a professional liability policy. Healdsburg's exhibit carves professional liability out of its additional insured and endorsement requirements by name, which tells a reader that the city contemplated the coverage without buying its way onto it.
What has to be in hand before the notice to proceed
Bonds and certificates are usually the last thing assembled and the first thing checked. Assembling them against the solicitation rather than against last year's file is what keeps a start date.
The payment bond and the performance bond, on the agency's own forms where the solicitation says the form is mandatory, each at 100 percent of the contract.
The surety's authority. Healdsburg's bond form carries the instruction "A certified copy of unrevoked resolution of authority for the attorney-in-fact must be submitted with and attached to the executed bond." That is the same document Code of Civil Procedure section 995.660 gives a surety 10 calendar days to produce when a bond's sufficiency is questioned, so the form asks for it up front rather than later.
The certificate, plus the endorsements named in the exhibit, at the edition the exhibit names.
The signed Labor Code section 1861 certification.
Any variation the agency approved, in writing, from the officer who approved it.
An evaluator checking a bid package reads these in about four minutes. A missing endorsement reads the same as a missing bond, because both leave the agency holding a promise it cannot enforce against anyone but the contractor.
Further reading
How a utility MSA is structured, and what a sub sees of it: Where the insurance exhibit sits in the document stack, and why raising a limit you cannot meet has to happen before acceptance.
Utility prequalification: what evaluators actually check: The notarized bonding capacity statement an agency wants from the surety itself, months before any bond is issued.
What a C-49 license covers on utility vegetation work: The $25,000 contractor's bond that rides with the license, and the parts of a vegetation contract the classification does not name.
Frequently asked questions
Is a payment bond required on a tree trimming contract for a city?
It depends on whether the buyer treats the contract as a public works contract, and the buyer decides that in its call for bids. Civil Code section 9550 requires a payment bond on a public works contract involving an expenditure over $25,000, and subdivision (b) makes the public entity state that requirement in the call for bids. The City of Healdsburg did state it for its 2026 electric line clearance solicitation and attached both bond forms. The City of San Bruno's tree pruning RFP required a performance bond and contained no payment bond form at all.
How much is the bidder's security on a city public works bid?
At least 10 percent of the amount bid, under Public Contract Code section 20171. Section 20170 limits the form to cash, a cashier's check, a certified check or a bidder's bond. If the successful bidder then fails to execute the contract, section 20172 forfeits the security, and section 20174 lets the city award to the second lowest bidder and apply the security to the difference between the two bids. Anything left over goes back to the surety.
Does the $25,000 contractor's license bond protect a utility or an agency?
Not in any useful amount. Business and Professions Code section 7071.6(b) caps the surety's aggregate liability at $7,500 for every claim except those brought by the homeowner beneficiaries in section 7071.5(a). The license bond is a condition of holding a license. Project security on a vegetation contract comes from the payment bond, the performance bond and the insurance schedule.
Is a certificate of insurance enough to prove additional insured status?
No. The ACORD 25 form says so on its own face: a statement on the certificate does not confer rights on the certificate holder in lieu of an endorsement. Additional insured status, primary and noncontributory wording and a waiver of subrogation each live on a policy endorsement. Healdsburg reserves the right to obtain a full certified copy of any policy and its endorsements, and failure to exercise that right is not a waiver of it.
Does commercial general liability cover herbicide application and helicopter work?
Read the policy before assuming it does. The County of Sonoma's own contract guidance states that the general liability form excludes direct coverage for the ownership, maintenance and use of aircraft, while still covering contractual liability for it. Right-of-way herbicide work is separately licensed by the Department of Pesticide Regulation, which sets its own financial responsibility floor of $100,000/$300,000/$50,000 under 3 CCR section 6524. That floor is far below what a utility contract asks for.
