Let us calculate the cost of **excavation & dumping **at the construction site as shown below.

__Given data:__

Length of excavation = 50m.

Depth of excavation = 1.5m.

Width of excavation = 6m.

Dumping distance = 1.5km.

**Calculation:**

Let us use **JCB-3DX** for the excavation purpose & tipper **truck of 10m³** capacity.

**1. Excavation cost:**

**The volume of the excavation**

= [length × breadth × depth]

= [ 50m. × 6m. × 1.5m.]

=** 450m³.**

The market rate for the JCB excavation is **INR 900/**- to **INR 1200/**- per hour., depending upon the regional availability & demand.

Let us consider an average rate of **INR 1050/**- per hour, for the calculation purpose.

The excavation capacity of the JCB ranges from **30m³ to 50m³** per hour, depending upon the type of soil.

Let us consider an average excavation capacity of **40m³****/**** hour** for the calculation.

**The cost of excavation **

= [(Total vol. of excavation ÷ excavation capacity/hr. ) × JCB rate/hr.]

= [(450m³ ÷ 40m³/ hour ) × INR 1050/-]

=[11.25hour × 1050/hour ]

= **INR 11,812/-**** **

**2. Dumping cost:**

The distance of the filling area is **1.5km**. from the excavated site.

The total distance traveled by a tipper truck

= up & down of 1.5km. = [2 × 1.5km.] =**3km**.

The tipper truck nearly takes 15min.(0.25hr.) to travel the distance of 3km.

The excavated volume by JCB = 40m³/ hour

Therefore no. of trucks needed/hr.

= [excavated vol./hr. ÷ tipper capacity]

= [ 40m³ ÷ 10m³]

= **4 nos.**

JCB takes 15min. ( 0.25hr.) to load one truck of 10m³ capacity.

So, the total time consumed by a tipper/trip

= [loading time + traveling time]

= [0.25hr. + 0.25hr.]

= **0.50hr.**

This suggests taking** 2no.** of trucks without keeping the JCB in idle position.

The market rate for the tipper truck is **INR 300/**- to **INR 500/**- per trip, depending upon the regional availability & demand.

Let us consider an average rate of **INR 400/- **for the calculation purpose.

**Note:**

The tipper rate/trip depends upon the distance traveled. The above-mentioned rate is for the distance within 2km.

**The cost of dumping **

= [(Total vol. of excavation ÷ tipper capacity )× soil bulking factor × tipper rate/ trip]

= [(450m³ ÷ 1**0m³** ) ×1.15 × INR 400/-]

=[45 trips × 1.15 × INR 400/- ]

= **INR 20,700/-**** **

**Note: **

The **bulking factor** is the percentage of volume change of excavated material (due to expansion) to the original volume before excavation.

The bulking factor differs from soil to soil & degree of compaction. However, for the calculation purpose, an average bulking factor i.e. **1.15** is considered.

**The total cost of excavation & filling**

= [excavation cost + dumping cost]

= [ 11,812/- + 20,700/-]

=** INR 32,512/-**

**Note**:

Insert the market rate of your region in the above procedure to estimate the correct cost.

**Thank you for going through these calculation steps❤. Have a good day 😄.**