A trench digger, a trencher on the counter ticket, hires for roughly $130 to $220 a day as a walk-behind and $450 to $700 as a ride-on cutting to about four feet. Depth and width choose the machine first and the ground chooses it second, because roots, rock and heavy clay decide which chain and which class will actually finish the run.
Three ways to open a narrow trench
A chain trencher cuts a clean slot and throws spoil to one side, which is what irrigation, cable and drain runs want. A vibratory plough slices the ground and pulls cable through with almost no reinstatement, ideal across an established lawn. A mini excavator digs slower and wider but handles rock, obstructions and anywhere the run is short and awkward.
Depth and width come from the run, not the machine
Decide the buried depth the service needs and the width of what is going in the ground, then hire to that. Chains are fitted in widths from about four to eight inches on rental machines. Over-cutting costs you twice, once in slower progress and again in the backfill and compaction you now have to put back.
The ground decides whether the day works
Loam and sandy soil cut fast. Dry clay is slow and hard on teeth. Roots stop a small machine dead and stones the size of a fist will pull the chain. If you know there is rock, hire the bigger machine or the excavator rather than losing an afternoon to a walk-behind that cannot get through.
The depth that changes the rules
Depth is not only a cost question. OSHA requires a protective system, sloping, shoring or shielding, in trenches five feet deep or more unless the excavation is in stable rock, and past twenty feet the system has to be designed by a registered professional engineer. A trencher cutting four feet stays under that line; anything deeper puts a trench box on the order.
Questions people ask about trench digger
Do I have to have utilities located first?
Yes, and it is free. Call 811 before you dig, wait the required period and dig cautiously by hand within the marked tolerance zone. A trencher chain finds a gas service or a fibre run faster than anything else on a rental fleet, and the bill for that dwarfs the hire.
How long does a trencher take on a hundred foot run?
In cooperative soil at a couple of feet deep, a walk-behind will cut that in well under an hour of actual trenching. The day goes on setting out, moving around obstacles, laying the service and backfilling. Plan the hire around the whole job, not the cutting time.
Can one person handle a walk-behind trencher?
Yes, once it is on the ground, though it pulls hard and needs a firm grip when the chain bites. Loading it on and off a trailer alone is the harder part and is where people get hurt. If the machine has to travel, take a second pair of hands or pay for delivery.