Can your Hargeisa contractor really excavate rock?

Rock excavation experience gaps in Hargeisa rarely appear as a missing certificate. They appear as a crew that has never run a breaker on hard ground, a bid priced on the assumption that everything is loose soil, and a programme that loses weeks once the machine stops cutting. The client pays for the gap through standing plant time, rework and argument.

How does the gap show up in rock excavation in Hargeisa?

It shows up first in the ground, then in the programme. A machine selected for soil meets weathered rock, the bucket skates, and the crew has no second method ready. Ask the site engineer to note the depth where the digging changed and photograph the material in place.

A bidder without rock experience can price the work as if the ground will cut like gravel. That bid then looks competitive. When the machine stops, the contractor claims unforeseen conditions, production falls and plant sits idle while someone decides what to do next.

The pattern is measurable on site: metres advanced per day, breaker hours, bucket teeth replaced, trucks loaded. Ask for those records from the excavator log. If the contractor has no log, that itself tells you how the last job was run.

Check the method against the ground the plot actually has. Ask the municipal engineer's office what ground records it holds for the area, and compare them with what the bid says. Treat that answer as a starting point, not a survey.

What should a client check before awarding the work?

Ask for the method statement, then test it against people and plant. The method should name the excavation sequence, the breaking method, how the sides will be supported and how water will be handled after Gu or Deyr rain.

Ask three questions. Which machine will break the rock, and what class is it? Who operates it, and on which site did they last run it on hard ground? Where is the nearest workshop that can service the breaker or hydraulic hammer? A contractor with no answer to the third question loses days to a repair.

Then walk a recent excavation the same crew finished. Look for the finished face, the stockpiled material and the haul route. Ask the supervisor there what slowed the job. A short visit tells you more than any document.

Confirm the technical limits against the project's specification or engineer. Spacing of rock breaking, depth of excavation and side support are decided by the design, not by habit, and general practice varies with the machine.

How do you protect the programme once work starts?

Control the method, not just the output. Instruct the contractor to record the excavation method used each shift and the point where the material changed. A written record turns a later claim into a checkable fact.

The supervisor should agree in advance what happens when rock is met: who inspects the face, who approves the change of method, and how the instruction is written. Put that in the contract discussion before award, and check what the contract allows for variations.

Measure progress in metres and hours, not in optimism. Standing plant costs money whether or not the breaker is working.

Keep the excavated material in a place where it can be inspected and re-used if suitable. Poor stockpiling at the site edge costs removal later.

What to do next

Before you award, ask every bidder for the excavation method statement, the plant list with breaker class and operator names, and contact details for one completed rock excavation. Call that contact, then visit the site and look at the finished face. If the answers do not match the plant on the ground, price the risk into your decision or find a crew that has cut rock before. Do this before the machines mobilise, not after the first bucket fails.