SiteBid AI — Septic & Field Bed Estimate

Conventional gravel or chamber system, tank & d-box, bedding, hauling, and permit fees.

System Type

Type

Field Geometry

Field length total (ft)Trench width (ft)Trench depth (ft)Bedding under pipe (ft)Gravel over pipe (ft)Use fabric on top

Tank & Piping

Tank exc L (ft)Tank exc W (ft)Tank exc D (ft)D-Box countRiser countPerforated pipe length (ft)Solid pipe length (ft)Pipe OD (in)

Productivity & Haul

Haul-off fraction (0–1)Truck cap (yd³)Round-trip haul (min)Dig prod (yd³/hr)Backfill prod (yd³/hr)Loader prod (yd³/hr)

Rates & Fees

Excavator ($/hr)Loader ($/hr)Trucking ($/hr)Tank ($/ea)D-Box ($/ea)Riser ($/ea)Gravel ($/yd³)Chamber ($/ea)Perforated pipe ($/ft)Solid pipe ($/ft)Fabric ($/sf)Dump fee ($/yd³)Extras (lump $)Permit fees ($)

Markup

Overhead (%)Contingency (%)Profit margin (%)

Client Info

NamePhoneEmailAddress (line)Project Addr (line)

Results

System

Gravel

Trench width (ft)

3.00

Field excavation (yd³)

55.56

Tank excavation (yd³)

13.33

Total excavation (yd³)

68.89

Bedding (yd³)

11.11

Gravel cover (yd³)

11.11

Gravel total (yd³)

22.22

Backfill (yd³)

46.67

Haul-off (yd³)

41.33

Trips

Trucking hours

1.67 h

Dig hours

2.46 h

Backfill hours

1.17 h

Loader hours

0.49 h

Tank

$1,800.00

D-Box

$150.00

Risers

$0.00

Chambers

$0.00

Gravel

$1,000.00

Perforated pipe

$500.00

Solid pipe

$180.00

Fabric

$270.00

Dump fees

$330.67

Equipment

$507.69

Trucking

$158.33

Extras

$0.00

Subtotal

$4,896.69

Base (OH+Cont)

$5,876.03

Total (with profit)

$6,912.98

Permit fees (pass-through)

$0.00

Grand Total

$6,912.98

Sensitivity (share of subtotal)

Materials: 86%
Trucking: 3%
Equipment: 10%

Proposal Preview

Your Company Name LLC

(555) 555-5555 • bids@yourcompany.com • https://yourcompany.com

123 Main St, Yourtown, MI 49000

MI Contractor #12345

Proposal

9/5/2025

Valid 14 days

Bill To

—

Project

Septic System (Gravel Trench)

Install complete septic system per plan/spec; excavation, bedding/chambers or gravel, tank & d-box set, piping, backfill, and restoration as noted.

Scope of Work

Gravel trench system: bedding 0.5 ft under pipe, 0.5 ft cover, fabric on top.
Field: 200 ft total length × 3 ft wide × 2.5 ft depth.
Tank excavation ~10 × 6 × 6 ft. D-box: 1, risers: 0.
Piping: perforated 200 ft, solid 60 ft @ Ø 4"
Haul-off ~60% of spoils; truck 12 yd³; RT haul 25 min.

Item	Amount
Materials	$4,230.67
Equipment & Labor	$507.69
Trucking	$158.33
Subtotal	$4,896.69
Overhead (10%) + Contingency (10%)	$979.34
Profit (15%)	$1,036.95
Total (before permit)	$6,912.98
Grand Total	$6,912.98

Inclusions

Excavation, bedding/chambers or gravel per spec
Tank & d-box set and connection
Piping, backfill, shaping
Trucking/disposal as calculated
Mobilization

Exclusions

Rock excavation or groundwater control/dewatering
Shoring/boxes, perc tests/design/permits
Electrical for pumps/alarms if required
Traffic control beyond noted
Items not specifically described

Payment terms: Net 15 unless otherwise stated. Scheduling subject to weather and site access.

Acceptance

Client Signature: _______________________________

Printed Name: __________________________________

Date: __________________________________________

Company

Signer: _______________________________

Title: __________________________________

Date: __________________________________

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Assumptions (auto-print on quote)

Gravel bedding 0.5 ft under pipe, 0.5 ft cover, fabric on top.
Field length 200 ft × width 3 ft × depth 2.5 ft.
Tank excavation 10 × 6 × 6 ft.
Haul-off 60% of spoils; truck 12 yd³; RT 25 min.
Overhead 10%, Contingency 10%, Profit 15%. Permit fees listed separately (no markup).

Inclusions / Exclusions (draft)

Inclusions: excavation, bedding/gravel (as applicable), tank & d-box set, piping, backfill/shape, trucking/disposal, chambers or gravel per spec, mobilization.

Exclusions: rock excavation, groundwater control/dewatering, shoring/boxes, perc tests/design, electrical for pumps/alarms, traffic control beyond noted, permits/fees (listed separately).