Public works projects are bid on unit prices, not square-foot building costs. You need quantities that match the agency bid form line for line, because a missed pay item is money you cannot recover after award. We take off roads, water, sewer, drainage, and site utilities in LF, CY, SY, TON, and EA, then price them with ZIP-code-adjusted material and labor rates from RSMeans data. Our public works estimating services are built around the measurement and payment clauses in the specifications, so every quantity maps to a pay item number and unit.
- Deliverable
- Excel estimate + marked-up PDF plans
- Organized by
- CSI MasterFormat section
- Turnaround
- 24–48 hours for most projects
- Pricing
- ZIP-code-adjusted material and labor pricing
- Software
- Bluebeam Revu, PlanSwift, RSMeans data
If you are bidding to a city, county, DOT, or utility district, you need a takeoff that survives review. We organize every estimate by CSI MasterFormat division — including Division 02 existing conditions, Division 03 concrete, Division 05 metals, Division 26 electrical, Division 31 earthwork, Division 32 exterior improvements, Division 33 utilities, Division 34 transportation, and Division 35 waterway and marine — mark up the plan set with color-coded measurements, and deliver Excel and PDF files in 24–48 hours for most projects. Rush turnaround is available.
We work from the same documents you bid from: plan and profile sheets, standard details, technical specifications, geotechnical reports, and the agency bid schedule. We also read the front end documents, including the general conditions and supplementary conditions, and check the plan holder list for addenda. For related scopes, see our Commercial Estimating Services, Industrial Estimating Services, and Parking Structure Estimating pages. If your project is in a specific state, we also have Texas estimating and California estimating pages.
Our takeoff process begins with a thorough review of the bid documents. We check the plan and profile sheets for alignment and stationing, review the standard details for pipe bedding and trench widths, and read the technical specifications for material and testing requirements. We also examine the geotechnical report for soil classification, rock depth, and groundwater elevation. This information drives the excavation method, dewatering needs, and trench safety requirements, and it feeds our cut and fill balance for Division 31 earthwork.
We measure pipe runs station to station, count structures and appurtenances, and compute trench excavation and backfill volumes. For asphalt paving, we measure the limits and convert to tons using the mix design and compacted lift thickness. Every quantity is mapped to the agency pay item number and unit. We flag any bid form items that have no corresponding quantity in our takeoff, so you can address them before submission.
Our estimates are used by general contractors, subcontractors, public agency owners, developers, and architects and engineers. Whether you are bidding a new water main, a street reconstruction, or a subdivision utility extension, we provide the quantities you need to price the work with confidence. We do not estimate vertical building construction on this page; for that, see our commercial or industrial pages.
What our infrastructure estimating services cover
We estimate the horizontal scopes that public agencies bid by unit price: earthwork, paving, water and sewer mains, storm drainage, traffic signals, and erosion control. Each line is measured from the plan and profile sheets, cross-referenced to the technical specifications, and mapped to the pay item numbers on the bid form. We do not estimate vertical building construction on this page.
Clearing and grubbing by acre
Clearing and grubbing by acre, including grub removal and disposal
Unclassified excavation by cubic yard
Unclassified excavation by cubic yard, including haul and borrow
8-inch PVC sanitary sewer main by linear foot
8-inch PVC sanitary sewer main by linear foot, including bedding and backfill
48-inch RCP storm drain by linear foot
48-inch RCP storm drain by linear foot, including trench excavation
Manhole and inlet structures by each
Manhole and inlet structures by each, with precast base, cone, and frame/casting
Ductile iron water main by linear foot
Ductile iron water main by linear foot, with restrained joints and tracer wire
Aggregate base course by ton
Aggregate base course by ton, placed and compacted to specified depth
Hot-mix asphalt surface course by ton
Hot-mix asphalt surface course by ton, by mix designation and lift thickness
What every public works & infrastructure estimating takeoff includes
- Clearing and grubbing by acre, including grub removal and disposal
- Unclassified excavation by cubic yard, including haul and borrow
- 8-inch PVC sanitary sewer main by linear foot, including bedding and backfill
- 48-inch RCP storm drain by linear foot, including trench excavation
- Manhole and inlet structures by each, with precast base, cone, and frame/casting
- Ductile iron water main by linear foot, with restrained joints and tracer wire
- Aggregate base course by ton, placed and compacted to specified depth
- Hot-mix asphalt surface course by ton, by mix designation and lift thickness
- Portland cement concrete curb and gutter by linear foot
- Reinforced concrete pavement by square yard, with dowel baskets and joint sealant
- Traffic signal poles, mast arms, and controller assemblies by each
- Pavement markings by linear foot for striping and each for symbols
- Erosion control blanket and silt fence by square yard and linear foot
- Mobilization and traffic control by lump sum per phase
How our public works estimator builds a bid takeoff
- Register the plan and profile sheetsWe align the plan view to the profile view in Bluebeam Revu, then set the horizontal and vertical scales. Pipe runs are traced station to station so that the LF of main, the depth of cut, and the trench excavation volume all come from the same alignment. A misaligned profile is the most common source of over- or under-run on sewer and water main.
- Measure pipe by diameter and materialEach pipe run is measured as LF and tagged with diameter, material, joint type, and bedding class from the specifications. We separate PVC, ductile iron, RCP, and HDPE because they price differently and because the agency bid form usually lists them as separate pay items. Restrained joints, tracer wire, and thrust blocks are noted where the details require them.
- Compute trench excavation and backfillFor each pipe run we apply the trench width from the standard detail and the depth from the profile, then compute CY of excavation, bedding, and backfill. We subtract pipe volume and note whether rock excavation is a separate pay item or included in unclassified. Dewatering and trench safety are flagged when depths exceed 5 feet.
- Take off paving by section and liftWe measure the paving limits in SY, then convert to TON using the mix design and compacted lift thickness from the specifications. Full-depth asphalt, aggregate base with asphalt surface, and concrete pavement are kept as separate line items. Sawcutting and removal of existing pavement at tie-ins is measured in LF and added to the demolition scope.
- Count structures and appurtenancesManholes, inlets, valves, hydrants, and signal poles are counted as EA from the utility and signal plans. Each count is checked against the details for base type, cone, frame, and casting. Valve and hydrant assemblies are broken out separately when the agency bid form lists them as individual pay items, which is common on water main projects.
- Map quantities to the bid formWe match every takeoff line to the agency pay item number and description, then flag items on the bid form that have no corresponding quantity in our takeoff. That gap list is where bids are won or lost. The final Excel file is organized by CSI division and cross-referenced to the marked-up plan set.
What we need from you
- Bid setPlan and profile sheets, standard details, and technical specifications. Profile sheets are required for pipe depth and trench volumes.
- Geotech reportBoring logs and soil classification. Rock depth and groundwater elevation drive excavation method and dewatering cost.
- Agency bid formThe pay item list with item numbers and units. We map our takeoff to it so quantities drop straight into your bid.
- AddendaAll issued addenda, dated. A revised detail or changed pipe material after the original bid set changes the takeoff.
- Prevailing wageWhether Davis-Bacon or a state prevailing wage applies, and the wage determination. It changes labor rates, not quantities.
- Bid dateYour submission deadline. We schedule the takeoff so you have review time before the bid, not the morning of.
Sample public works takeoff format by pay item
This is how a utility and paving takeoff looks when it comes back to you. Quantities are illustrative and organized by CSI MasterFormat division.
| Section | Line item | Qty | Unit | Ref. |
|---|---|---|---|---|
| 31 23 16 | Trench excavation, 6' to 8' deep, unclassified | 9,800 | CY | C-201 |
| 31 23 16 | Trench backfill, compacted to 95% Standard Proctor | 7,420 | CY | C-201 |
| 33 30 00 | 8" PVC sanitary sewer main, SDR 35, gasketed joint | 4,250 | LF | C-301 |
| 33 30 00 | Manhole, 60" dia precast, with frame and cover | 22 | EA | C-302 |
| 33 11 00 | 12" ductile iron water main, restrained joint, tracer wire | 3,400 | LF | C-401 |
| 32 11 23 | Aggregate base course, 8" compacted depth | 4,850 | TON | C-501 |
| 32 12 16 | Hot-mix asphalt surface course, 2" lift, Type C | 2,180 | TON | C-501 |
| 32 13 13 | Reinforced concrete pavement, 8" thick, doweled joints | 1,240 | SY | C-502 |
| 33 40 00 | Storm drainage, 48" RCP, Class III, with bedding | 1,180 | LF | C-601 |
| 33 40 00 | Inlet, 4' x 4' precast, with grate and frame | 14 | EA | C-602 |
| 32 17 23 | Pavement markings, 4" white, waterborne paint | 12,500 | LF | C-701 |
| 31 25 00 | Erosion control blanket, Type 2, installed | 8,200 | SY | C-801 |
Units of measure we take off
Public works quantities are reported in the units the agency pays by. If your bid form uses tons and our takeoff is in cubic yards, we convert using the mix design and compacted depth, not a generic factor.
| Item | Unit | How it's measured |
|---|---|---|
| Pipe and conduit | LF | Measured along the centerline from plan and profile sheets, including fittings and valves |
| Excavation and embankment | CY | Average end-area method from cross sections, or trench width times depth times length |
| Asphalt and concrete paving | SY | Measured from the paving limits on the site plan, by lift and mix designation |
| Aggregate base and asphalt | TON | Converted from compacted volume using the specified mix design and density |
| Manholes, inlets, valves, hydrants | EA | Counted from the utility plan and details, with frame, cover, and casting noted |
| Clearing, seeding, erosion control | AC | Measured from the clearing limits and disturbed area on the erosion control plan |
| Traffic control and mobilization | LS | Lump sum per phase or per the agency bid schedule, not measured by dimension |
Worked example: 8-inch PVC sanitary sewer main takeoff
This example shows how we take off a 1,200 LF run of 8-inch PVC sanitary sewer main at an average depth of 7 feet. All dimensions are illustrative and do not represent a specific project.
Step 1 — Measure pipe length. From the plan and profile sheets, the run from manhole A to manhole B is 1,200 LF. We measure along the centerline, including fittings and valves. No waste factor is applied to pipe length because pipe is ordered in standard lengths and cut to fit; however, we add 2% for cutting waste and field adjustments as a separate line.
Step 2 — Determine trench dimensions. The standard detail shows a trench width of 3 feet for 8-inch pipe. The average depth from the profile is 7 feet. Trench cross-sectional area = 3 ft × 7 ft = 21 SF. Trench volume = 21 SF × 1,200 LF = 25,200 CF. Convert to cubic yards: 25,200 ÷ 27 = 933 CY. This is the total excavation volume.
Step 3 — Calculate bedding and backfill. The detail specifies a 6-inch bedding of granular material under the pipe and 12 inches of initial backfill over the pipe. Bedding volume = 3 ft × 0.5 ft × 1,200 LF = 1,800 CF = 67 CY. Initial backfill volume = 3 ft × 1 ft × 1,200 LF = 3,600 CF = 133 CY. Final backfill volume = total trench volume − pipe volume − bedding − initial backfill. Pipe volume = π × (0.667 ft)² ÷ 4 × 1,200 LF = 419 CF = 15.5 CY. Final backfill = 933 − 67 − 133 − 15.5 = 717.5 CY. We round to 718 CY.
Step 4 — Count structures. Two manholes are shown: one at each end. Manhole A is a 60-inch diameter precast with a 6-foot depth; manhole B is a 60-inch diameter precast with an 8-foot depth. We count them as 2 EA. Frame and cover are included.
Step 5 — Apply waste factors. Pipe waste: 2% of 1,200 LF = 24 LF. Bedding and backfill are compacted in place, so no waste factor is applied to those volumes. Manholes are precast and ordered to size, so no waste.
Step 6 — Map to bid items. The agency bid form lists: 8-inch PVC sanitary sewer main (LF), trench excavation (CY), trench backfill (CY), and manhole (EA). Our quantities: 1,224 LF (including waste), 933 CY, 718 CY, and 2 EA. We flag that the bid form does not list bedding separately, so it is included in the pipe item.
Step 7 — Price with ZIP-adjusted rates. We apply RSMeans material and labor rates adjusted for the project ZIP code. The final unit prices are not shown here because they vary by location and date. This takeoff is illustrative; actual quantities depend on the project plans and specifications.
What drives cost on public works bid estimating
Relative impact on a typical estimate for this trade, based on estimator judgment. Select a bar for details.
Trench depth
Deeper trenches increase excavation CY, require larger pipe bedding, and trigger trench safety systems. At depths over 5 feet, sheeting, shoring, or trench boxes become a real cost line that is often buried in the excavation price. We flag it separately so you can decide whether to carry it in unclassified or as its own item.
Deeper trenches increase excavation CY, require larger pipe bedding, and trigger trench safety systems. At depths over 5 feet, sheeting, shoring, or trench boxes become a real cost line that is often buried in the excavation price. We flag it separately so you can decide whether to carry it in unclassified or as its own item.
Whether rock is a separate pay item or included in unclassified changes the risk profile of the bid. If the geotech report shows shallow rock and the spec says unclassified includes rock, you carry that risk. We compare the boring logs to the profile and note where rock is likely to be encountered.
Groundwater elevation above the pipe invert means you need dewatering, and the method depends on soil permeability and depth. Wellpoints, deep wells, and open pumping price differently. The geotech report and the profile give us the data to flag it, but the means and methods are yours to choose.
Full-depth asphalt, aggregate base with asphalt surface, and concrete pavement have different tonnage per square yard and different unit prices. The section is defined in the typical details and the specifications. We take off each layer separately so you can price alternates if the bid allows them.
Lane closures, flaggers, temporary signs, and detours are usually lump sum per phase. The number of phases and the allowable work hours come from the traffic control plan and the special provisions. A project that allows night work only will carry a different traffic control cost than one with daytime lane closures.
Existing utilities shown on the plan are not always where the record drawings say they are. Potholing and test pits are sometimes a pay item and sometimes included in the excavation price. We note where the plan shows conflicts and whether the specifications require potholing before excavation.
At tie-in locations, you must sawcut and remove existing pavement to make a clean joint. The linear feet of sawcut and square yards of removal are measured from the plan and added to the demolition scope. This cost is often overlooked when the bid form does not list it as a separate pay item.
Specifications often require backfill to be compacted to a certain percentage of Standard Proctor density, tested at specific intervals. The number of lifts and testing frequency affect labor and equipment time. We note the required density and testing frequency so you can price the testing and the additional compaction effort.
Scope gaps we catch in general and supplementary conditions
These are the items that get missed on public works bids, usually because they are buried in the specifications or shown on a detail sheet that does not get a full review. We check for them on every takeoff.
- Trench safety — sheeting, shoring, and trench boxes for depths over 5 feet. It hides in the excavation note on the standard details. We flag it when the profile shows depths that trigger OSHA requirements.
- Dewatering and groundwater control during utility installation. It appears in the geotech report and the special provisions, not on the plan. We compare groundwater elevation to pipe invert and note the difference.
- Rock excavation clause — whether rock is bid as a separate pay item or included in unclassified. It is in the excavation section of the specifications. We read that clause and note the risk before you price.
- Utility potholing and test pits for existing line locations before excavation. It is often a separate pay item on the bid form. We check the bid form against our takeoff and flag it if we did not measure it.
- Maintenance of traffic — lane closures, flaggers, and temporary signs by phase. It is in the traffic control plan and the special provisions. We count the phases and note the work-hour restrictions.
- Erosion and sediment control inspection and maintenance through the project duration. It is in the SWPPP and the erosion control notes. We include it as a lump sum or a per-month item when the bid form allows.
- Asphalt tonnage conversion factors — tons vary with mix design and compacted thickness. It is in the mix design and the paving section. We convert from compacted volume using the specified density, not a generic factor.
- Concrete washout and spoils disposal — offsite haul and tipping fees. It is in the environmental section and the excavation notes. We add it as a separate line when the specifications require offsite disposal.
- Trench backfill compaction testing and density requirements per lift. It is in the earthwork section and the special provisions. We note the required density and the testing frequency so you can price the testing.
- Sawcutting and removal of existing pavement at tie-in locations. It is shown on the plan at connection points. We measure the LF of sawcut and the SY of removal and add it to the demolition scope.
- Valve, hydrant, and fitting assemblies — often listed as separate pay items in agency bid forms. They are on the water main plan and the bid form. We count them as EA and match them to the pay item numbers.
- Traffic signal interconnect conduit and pull boxes between intersections. It is on the signal plan and the electrical details. We measure the conduit in LF and count the pull boxes as EA.
Pipe material comparison for utility estimating services
Pipe material affects unit price, bedding requirements, and joint type. We take off each material separately because agencies often list them as separate pay items.
| Material | Typical diameters | Joint type | Bedding class |
|---|---|---|---|
| PVC (SDR 35) | 4"–15" | Gasketed push-on | Class B (granular) |
| Ductile iron | 4"–24" | Restrained or mechanical | Class A or B |
| Reinforced concrete (RCP) | 12"–72" | Bell and spigot with gasket | Class A or B |
| HDPE | 2"–24" | Butt fusion or electrofusion | Class B or C |
| Corrugated metal (CMP) | 12"–96" | Coupling bands | Class B or C |
Codes, DOT specifications and standards that affect estimating
Model codes
Public works projects are governed by a mix of model codes and agency specifications. The International Building Code (IBC) and International Residential Code (IRC) apply to buildings, but horizontal infrastructure often falls under local public works standards. The International Plumbing Code (IPC) and Uniform Plumbing Code (UPC) govern water and sewer connections to buildings. The National Electrical Code (NEC) applies to traffic signal and pump station electrical work. The International Fire Code (IFC) and NFPA standards may apply to fire hydrant flow and spacing. Confirm the adopted code edition with the local building department, as editions vary by jurisdiction and affect requirements for pipe materials, trench safety, and testing.
Industry standards
Estimators must reference standards from ASTM, ACI, and AWWA. ASTM D3034 covers PVC sewer pipe, ASTM A746 covers ductile iron gravity sewer pipe, and ASTM C76 covers reinforced concrete pipe. AWWA C900 and C905 cover PVC pressure pipe, while AWWA C151 covers ductile iron water main. ACI 318 and ACI 350 apply to concrete structures like manholes and pump stations. These standards specify dimensions, joint types, and testing methods that change material quantities and waste factors. For example, ASTM C76 requires a specific wall thickness that affects pipe weight and handling.
Specification sections
CSI MasterFormat divisions organize the work. Division 31 (Earthwork) includes clearing, excavation, and backfill. Division 32 (Exterior Improvements) covers paving, curbs, and markings. Division 33 (Utilities) includes water, sewer, and storm drainage. Division 34 (Transportation) covers traffic signals and bridge railings. Division 46 (Water and Wastewater Equipment) covers treatment equipment. The specifications within these divisions define pipe bedding, backfill compaction, testing frequency, and pay items. For example, a specification that requires 95% Standard Proctor compaction will increase labor and testing costs compared to 90%.
Local amendments
Local agencies often amend model codes and standard specifications. For instance, a city may require ductile iron pipe for all water mains regardless of diameter, or may have stricter trench safety requirements than OSHA. Some agencies have their own standard specifications that supersede state or model codes. Always confirm the adopted code edition and local amendments with the local building department and the agency issuing the bid documents. The bid form and special provisions take precedence over generic standards.
Who uses this public works estimate for contractors
General contractors
You are bidding to a public agency and need quantities that match the bid form line for line. A missed pay item is money you cannot recover after award, so you use our takeoff to check your own and to price the work you will subcontract.
Subcontractors
You bid the utility, paving, or signal package to the general contractor. You need a takeoff that separates your scope from the earthwork and the traffic control, so you can price your labor and equipment without carrying someone else's risk.
Public agency owners
You are preparing an engineer's estimate or checking a bid for unbalanced pricing. You need a unit-price takeoff that reflects current ZIP-code-adjusted material and labor rates, not last year's bid tabulation.
Developers
You are building a subdivision or commercial site and need to extend water, sewer, and drainage to the public main. You use the estimate to budget the offsite utility work before you commit to the lot purchase.
Architects and engineers
You are designing the project and need a cost check before the bid set is issued. You use our takeoff to confirm that the quantities in your opinion of probable cost are in the right range.