Pile, Caisson & Footing Excavation · Cambridge
Pile, Caisson and Footing Excavation in Cambridge
A caisson for a loading canopy goes in a metre from the fire main, in a yard that is still shipping. A deck footing in Galt goes in beside a stone foundation nobody drew. Both are hydrovac holes.
Hydrovac is seldom the tool for bulk excavation and exactly the tool for holes that must be exact, deep and close to something that cannot be disturbed. In Cambridge that is caissons for loading canopies, racking and sign structures in paved yards full of plant services, pre-excavation at helical pile locations on industrial and infill sites, pier footings tight to a house on the old river lots, and underpinning pits beside foundations that are sometimes stone. The water cuts cleanly to the designed depth, the hole walls stay truer than a bucket leaves them, and the vacuum manages the water that collects in a hole near the river.
Typical jobs in Cambridge
- Caissons in live yards for canopies, racking, signs, light standards and camera poles in Hespeler, Pinebush and along the 401, through pavement and past fire mains, process lines and feeders, to the engineered depth, in production windows.
- Helical pile pre-excavation on industrial additions and on infill sites in Galt and Preston, exposing the top metre or two at each location so the pile contractor knows the path is clear before torquing in, which on a mill-era lot often finds something.
- Addition and deck pier footings on the older lots along the Grand and the Speed, where the footing sits against the house, the services enter nearby and the side yard is too narrow for a machine.
- Underpinning and basement lowering pits, cut in sequence to the engineer's drawings beside existing footings, including rubble stone foundations in the old river towns.
- Exposing existing footings for assessment, waterproofing or repair where a backhoe would risk the foundation.
How it works on site
Locations are set out by the contractor or surveyor. The One Call locate is complete and, on a plant site, the drawings have been reviewed and a private locate done. On any property near the Grand or Speed rivers the Grand River Conservation Authority's regulated-area mapping has been checked, since removing material from a site in a regulated area can need a permit under O. Reg. 41/24, and in Galt and Preston that covers a large share of lots. Each hole is cut to the specified diameter and depth, the base is checked, and the hole is left open and protected or plated for the concrete or pile crew, or shored where anyone must enter under Ontario's construction regulation. Spoil leaves in the truck. Footing depth follows the engineer's drawing, which respects the Ontario Building Code requirement to be below frost penetration; the depth that applies to a Cambridge property is confirmed with the City's building division.
What sets the quote
Hole count, diameter and depth, soil and groundwater, access, pavement cutting and plating, shoring if required, off-hours windows, and slurry volume. Deep holes in wet silt near the rivers produce a great deal of spoil, and disposal loads are a large part of a caisson job. On an open site with good access and nothing in the ground a mini-excavator is cheaper, and the quote says so.
Frequently asked questions
How deep can a hydrovac caisson hole go?
To the depths residential and light industrial footings and caissons call for, and deeper on request. If anyone has to enter the excavation, Ontario's construction regulation requirements for protecting workers apply and the hole is shored or benched. Most footing holes are poured from the surface.
Is hydrovac cheaper than a mini-excavator for footings?
Not on an open site with good access. It is cheaper when the alternative is hand-digging beside a fire main or a feeder, when the machine cannot reach the hole, when the yard cannot be closed, or when the cost of hitting something is far higher than the difference.
What about water in the hole near the river?
The vacuum removes groundwater along with the spoil as the hole is cut, which is one of hydrovac's advantages over a bucket on a wet site. Water that collects after the hole is open is managed by the contractor pouring the footing, and that is discussed at quote stage on any river-adjacent lot.
Serving Cambridge and surrounding areas. Contact us for a no-obligation quote specific to your property.