Do you count pipe fittings and valves individually?

Yes! We count every tee, elbow, reducer, gate valve, butterfly valve, check valve, and fire hydrant assembly individually so you can send exact lists to utility suppliers.

How do you calculate trench bedding stone quantities?

We calculate bedding stone tonnage based on trench width, pipe outer diameter, required under-bedding depth (usually 4-6 inches), and pipe cover depth specified by local public works codes.

Do you handle both wet and dry underground utility takeoffs?

Yes! We estimate wet utilities (water, sanitary, storm sewer) as well as dry utility conduit pathways (electrical duct banks, telecommunications, gas mains).

Do you count pipe fittings and valves individually?

Yes! We count every tee, elbow, reducer, gate valve, butterfly valve, check valve, and fire hydrant assembly individually so you can send exact lists to utility suppliers.

How do you calculate trench bedding stone quantities?

We calculate bedding stone tonnage based on trench width, pipe outer diameter, required under-bedding depth (usually 4-6 inches), and pipe cover depth specified by local public works codes.

Do you handle both wet and dry underground utility takeoffs?

Yes! We estimate wet utilities (water, sanitary, storm sewer) as well as dry utility conduit pathways (electrical duct banks, telecommunications, gas mains).

CSI Division 33 — Utility Infrastructure Specialist

Rated by Contractors Across USA

Precision Underground Utility Estimating & Pipe Takeoffs

Earthwork moves soil. Excavation creates the opening. Underground Utility Estimating installs the infrastructure inside that opening. Complete water main, sewer, storm drain, and manhole schedules in 24–48 hours.

Upload Utility Plans & Profiles View Sample Utility BOQ

CSI MasterFormat

24–48 Hour Turnaround

98% Bid Accuracy

USA Estimators

Active Project

Commercial Office Build

Estimating

Takeoff Progress75%

Trade

Electrical & HVAC

Estimated Delivery

48 Hours

Accuracy Check

100% Passed

What Is Underground Utility Estimating?

Underground utility estimating is the specialized civil takeoff discipline focused exclusively on quantifying and pricing wet and dry subterranean infrastructure networks—including domestic water mains, sanitary sewer lines, storm drainage systems, utility structures, and duct banks. While *Earthwork* moves soil and *Excavation* digs trenches, *Underground Utility Estimating* prices the physical piping, fittings, valves, manholes, bedding stone, and hydrostatic pressure testing required to complete wet utility networks. ### The BuildMetric 5-Step Utility Verification™ Our proprietary 5-step framework eliminates utility bidding oversights and missing scope items: 1. **Utility Plan & Profile Review**: Cross-referencing civil utility plan views with profile invert elevations, slope percentages, and pipe material schedules. 2. **Subsurface Crossing & Conflict Audit**: Identifying existing gas, electric, fiber, and water main crossings to price hand digging and clearance protection. 3. **Piping & Structure Takeoff**: Quantifying exact linear footage by pipe diameter/material, gate valves, hydrants, manholes, catch basins, and fittings. 4. **Trench Bedding & Backfill Modeling**: Calculating gravel bedding stone, pipe envelope material, trench backfill, and compaction requirements. 5. **Testing & Commissioning Schedule**: Factoring in hydrostatic pressure testing, chlorination, mandrel pull tests, and TV sewer inspection camera fees.

Comprehensive Utility Infrastructure Scope

Granular takeoff breakdown across all wet and dry utility distribution systems

Domestic & Fire Water Main Networks

Ductile Iron (DIP), C900 PVC, gate valves, fire hydrants, concrete thrust blocks, water service taps, and backflow preventers.

Sanitary Sewer Infrastructure

SDR-35/26 PVC gravity sewer mains, force mains, precast concrete manholes, drops, cleanouts, and lift station connections.

Stormwater Drainage & Catch Basins

Reinforced Concrete Pipe (RCP), HDPE corrugated pipe, concrete catch basins, curb inlets, headwalls, and detention structures.

Pipe Bedding & Backfill Aggregates

#57 stone pipe bedding, clean gravel, flowable fill, select trench backfill, and trench compaction volume modeling.

Dry Utility Duct Banks & Conduits

Electrical duct banks, transformer pads, communications conduit pathways, handholes, and joint utility trenching.

Testing, Chlorination & Video Inspection

Hydrostatic water main pressure testing, chlorine disinfection flushing, mandrel deflection testing, and CCTV sewer camera inspection.

Itemized pipe, fitting, and structure schedules ready for utility supply house pricing and contractor bidding

Specialized Utility Deliverable Assets

Visual Asset Pending

Itemized Pipe & Fitting Takeoff Schedule

Linear feet of pipe categorized by diameter, material class, invert depth range, tee/elbow fittings, and valve counts.

Visual Asset Pending

Precast Concrete Structure Schedule

Complete breakdown of manholes (by depth and diameter), catch basins, inlets, frame & grate assemblies, and headwalls.

Visual Asset Pending

Trench Bedding & Testing Allowance Summary

Tonnage of #57 stone pipe envelope, select backfill cubic yards, water main chlorination, and CCTV video inspection allowances.

How overlooked utility details cause devastating contractor profit losses

Top 6 Underground Utility Estimating Mistakes That Destroy Bids

Omitting Ductile Iron Fittings & Concrete Thrust Restraints

Bidding water main pipe by linear feet while missing mechanical joint fittings (tees, bends, reducers) and concrete thrust blocks leads to a 15–25% material cost shortfall.

Ignoring Existing Underground Utility Crossing Conflicts

Failing to check profile drawings for existing gas, electric, or fiber crossings results in unbudgeted hand digging, utility potholing, and pipe lowered offsets.

Undercalculating #57 Stone Pipe Bedding Thickness

Calculating trench backfill with generic dirt while ignoring municipal requirements for 6-inch under-bedding and 12-inch pipe envelope stone inflates aggregate costs.

Oversight on Live Water & Sewer Tap Connection Fees

Forgetting public utility municipality tap fees, wet tapping saddles, or hot taps into existing live mains adds thousands in unexpected municipal costs.

Omitting Mandatory Hydrostatic & Chlorination Testing

Failing to include water main pressure testing, bacteriological testing, flushing water disposal, or CCTV sewer camera inspections leaves zero margin for commissioning.

Miscalculating Deep Manhole Drop Structure Costs

Estimating deep sanitary manholes (>12 ft) at standard shallow manhole rates ignores expensive riser sections, heavy cranes, and drop bowl assemblies.

Understand the exact responsibilities of each civil trade to avoid double-counting or scope gaps

Civil Trade Scope Boundary Comparison

Feature Breakdown

Primary Responsibility

BuildMetric Underground Utility Focus

Earthwork Estimating

Soil Movement

Site Mass Cut & Fill Balancing

Excavation Estimating

Digging & Trenching

Foundation Footings & OSHA Trench Laybacks

Underground Utility Estimating

Pipe & Infrastructure

Water, Sewer & Storm Piping, Structures & Valves

Bedding & Backfill

Generic Dirt

#57 Stone Envelope & Select Aggregate

Testing & Certification

Not Included

Hydrostatic Testing, Chlorination & CCTV Video

Frequently Asked Questions About Underground Utility Estimating

Clear answers regarding wet and dry utility takeoffs

We require Utility Site Plans, Utility Plan & Profile sheets, Civil Grading Plans, Utility Details (manholes, hydrants, thrust blocks), and Project Specifications.