Caltrans changed bid items: 2 payment routes

Key takeaways

Confirm scope before pricing the change.
Match the work to a bid item by description, not just by name.
Document any material difference in unit cost.
Check the cited payment provisions before submitting your estimate.

The Caltrans Construction Manual lays out the main fork in its scope of work section. Work that can be defined as bid items is handled one way. Work that cannot is handled another, and the section points you to other parts of the manual for each.

This post walks through the two routes, the special branch inside the first one, and the scope check that comes before both. It is a map, not a replacement for the contract documents or the manual. Read the sections it points to before you submit a number.

Why the route matters more than the number

A price built on the wrong route tends to fail in review, even when the arithmetic is right. The reviewer asks which item the work falls under, why that item was chosen, and what method produced the figure. If the answer is unclear, the number is hard to defend, however careful the math.

That is why the first hour on a changed item should go to classification, not pricing. Decide what the work is, which route it belongs to, and what evidence supports that call. The pricing then follows the route rather than the other way around.

Check scope before you pick a route

Before you decide how to pay for a change, confirm that the work belongs to the contract at all. The scope section addresses this directly. It says the work "must be performed by a separate contract unless authorized as indicated in Section 5-302, “Change Order Policy,” of this manual." The scope section is the place to start, and Section 5-302 is the policy it points to for authorization.

That order of operations is the point. Ask whether the added work sits inside what the contract asks for. Only then ask which payment route applies. If the answer to the first question is no, the change order policy and a separate contract decide what happens, and pricing the work as a change on this contract may be the wrong tool altogether.

Scope is a judgment, so document it. Compare the altered work against the bid item descriptions, the specifications that govern those items, and the plans that show the work. Write down which items you compared and why you concluded the work is or is not covered. If the question ever comes up in a claim or a dispute, that note is worth more than your memory of the meeting.

Route one: the changed work fits an existing bid item

The first route applies when the altered or added work can be defined by bid items already in the contract. The change is priced against work the contract already pays for. You measure the altered quantity as that bid item and start from the item's price.

The manual adds a condition that can change the outcome. It reads: "If the changed work can be defined as bid items, but the unit cost differs materially, make payment under the provisions of Section 4-1.05B, “Work-Character Changes,” of the Standard Specifications, rather than for the entire added work as changed work." The manual's section on scope states that rule.

Do not invent a material-difference threshold from memory. Check Section 4-1.05B itself, and check the contract, before you decide the difference is material. Then write down the unit cost you compared and the basis for calling the difference material or not.

The manual also points to two other places for work-character changes. It says: "Also refer to Section 9-1.15, “Work-Character Changes,” of the Standard Specifications and Section 3-904C, “Work-Character Changes,” of this manual." Read those alongside Section 4-1.05B, since the manual lists them together on this topic.

For route one, a practical sequence looks like this:

Identify the bid item that describes the altered work, and confirm its unit.
Measure the altered quantity the way that item is measured.
Compare the altered work's unit cost against the item's unit price, and write down the comparison.
If the unit cost is materially different, move to the work-character change provisions in Section 4-1.05B.
If it is not, the bid item remains the basis for payment.

For help keeping quantities comparable, review takeoff unit conversion.

Route two: the added work has no matching bid item

The second route applies when the added work cannot be defined as bid items. No item in the contract prices it directly, so you need a different payment method. The manual sends you to two sections for that. It says: "Refer to Section 3-9, “Payment,” and Section 3-5, “Control of Work,” of this manual for a discussion of payment methods for extra work." The scope section gives you that cross-reference.

Read those sections before you build the number, and make sure the method you choose matches what the manual describes for extra work. Pricing from habit or from the last job is how estimators end up defending a figure they cannot support.

The manual also gives you a worked reference for the math. Its Section 5-3, “Change Orders,” "contains examples of calculations." Use those examples as a check on your own build-up. If your structure does not resemble the examples, find out why before you submit.

Build the estimate so each element can be traced: labor, equipment, materials, and any subcontracted work, each with its own backup. A total with no trail is hard to defend when the person reviewing the change starts asking questions.

Two scenarios to test the logic

Abstract rules are easier to apply once you see them used. The two scenarios below are hypothetical, so use them to practice the sequence rather than as a guide to any real job.

Illustrative example: a drainage realignment

A drainage realignment is within contract scope and matches an existing pipe item. Record the comparison, then check the contract and the work-character change provisions to decide whether the difference is material. The arithmetic alone does not settle that question or establish the amount payable.

Scenario two: a small retaining wall. A field condition calls for a short retaining wall the contract never described. Nothing in the bid schedule matches it. That is route two. Confirm scope first. Since there is no bid item unit price to compare, the price comes from the payment methods the manual discusses in Sections 3-9 and 3-5, with the calculation examples in Section 5-3 as your check. The work is priced as extra work and documented as extra work. It should not be folded into a nearby bid item just because that is convenient.

The two scenarios differ on one question: whether the work can be defined by an item.

Set up the bid so route decisions are easier

Route decisions are faster when the bid was read carefully. Before you bid, read the bid item descriptions and note what each one includes and what it leaves out. Note which items describe work in general terms and which are specific. When a change comes in, the question of whether it fits an item is quicker to answer if you already know how the schedule divides the work.

Your own unit prices also matter. Route one compares the changed work's unit cost with the item's unit price, and your bid is where that price came from. Keep the bid worksheets that support each unit price. When a change arrives months later, you will want to know what the original number assumed, what labor and equipment it included, and whether those assumptions still hold.

For a related review of estimate inputs, see the construction estimate audit.

Talk about the route before you talk about the price

The route is not only a pricing question. It is also a conversation with the agency. Before you submit a change, you should be able to say in one sentence which route you are using and why. Practice the sentence.

For route one, it might be: "This work is defined by item X, and the unit cost differs materially, so we are pricing it under the work-character change provisions." For route two, it might be: "This work is not defined by any bid item, so we are pricing it under the extra-work payment methods in Sections 3-9 and 3-5."

If the agency disagrees, ask which part they dispute: scope, the item match, or the cost difference. Those are three different arguments. Each one needs its own evidence, and it helps to know which one you are having before you start pulling records.

Keep the tone factual. The reviewer is reading for the basis of your call, not for your opinion of the change. A clear statement of the route, the reason for it, and the records behind it usually moves the conversation faster than a long explanation of why the work was difficult.

Working with subcontractors

If a subcontractor performs the changed work, the route still governs how you present the change. Ask the subcontractor for a cost breakdown in the same structure you would use for your own work, so the change can be presented as one piece. Ask them to say whether their work matches a bid item or is extra work. Their description and yours should agree, or the reviewer will notice the gap.

Check the subcontract for notice and documentation duties. A late or incomplete record from a subcontractor can weaken the prime's position even when the route is correct. Set a single internal date by which subcontractor backup is due, and build your own submittal schedule around it.

Do not let a subcontractor's label decide the route. A subcontractor may call the work extra work because it sits outside their scope. The prime still has to decide whether the work fits a bid item in the prime contract. Those are separate questions.

Documentation that supports either route

Whichever route you land on, the paper trail decides how well the number holds up. Start collecting it on the day the change begins, not when you sit down to price it. The following records cover most cases:

Written direction or instruction for the changed work, with the date and who gave it.
Field records showing what was done, where, and in what quantity.
Photos and notes that show conditions that differed from what the bid assumed.
The bid item list you used, with the unit and unit price for each item you compared.
A short memo on how you determined scope and which route applies.

Records made when the work happens carry more weight than records assembled weeks later. A daily report written at the time is more useful than a summary written from memory during a dispute.

The contract sets the notice and submittal rules for changes. Read them before work starts. Check the contract for the applicable deadlines.

Common mistakes

Watch for these route errors:

Matching by name. A bid item with a similar title does not mean the work is defined by that item. Compare the description and the governing specifications, not just the heading.
Skipping the material-difference question. Write down the unit cost comparison, even when the answer seems obvious.
Pricing outside-scope work as a change on this contract. If the work is not covered, the change order policy and possibly a separate contract decide the outcome.
Building a number from habit. Check your structure against the calculation examples in Section 5-3 before you submit.
Waiting to document. Collect the field records while the work happens.

When the route is unclear

Sometimes the honest answer is that you cannot tell whether the work fits a bid item. That is a good moment to ask for direction in writing rather than guess. Put the question to the agency's representative, describe the work, state which bid items you think it could fall under, and ask for a decision in writing. A written answer gives you something to price against and something to point to later.

Do not treat silence as agreement. If the agency has not responded, your figure is still an estimate of your position, not a settled answer. Keep working the record, and follow up in writing on the open question.

If you and the agency disagree on the price, the dispute process in the contract governs what happens next. Read it before the work starts, because its steps and timing come from the contract itself, not from this post.

Today, choose one pending change and write a short scope-and-route memo. Attach the bid item description you compared, your unit cost comparison if applicable, and the question you still need answered before pricing.

Questions to answer before you submit

What should the route statement include?

State the chosen route, the item match or reason no item applies, and the records supporting your decision. Keep that statement with the estimate so the reviewer can follow the basis of your price.

What should accompany subcontractor figures?

Request a cost breakdown in the same structure as your own estimate. Check that the description agrees with your route statement and that the backup arrives before your internal submission date.

What if a submission check is unanswered?

Resolve the gap before submitting the figure. Check written direction, quantities, calculation structure, notice requirements, and any unresolved scope question against the contract and the cited manual sections.