Depth requirements decide most of this. Canada's frost lines, septic regulations, and drainage standards push many common trenching jobs below what a skid steer trencher can reach — but not all of them. Here's how to think through it.
Based on published manufacturer specifications and Canadian building code frost depth requirements. Frost line data reflects National Building Code of Canada guidelines and provincial amendments. Always verify depth requirements with your local municipality before beginning utility or septic work. Last reviewed: 2026-03-17 by Skid Steer Attachments Canada.
Most trenching decisions in Canada come down to one thing: depth. The backhoe digs 12–14 ft. A skid steer chain trencher attachment reaches 4–5 ft, sometimes 6 ft on larger machines with the right setup. That gap matters enormously for anything that has to go below frost.
But it's not always about depth. Access, mobilization cost, the machine you already own, and the nature of the trench run (straight utility line vs complex dig around existing utilities) all factor into the decision. This guide helps you sort through it.
Chain trencher attachments for skid steers are purpose-built tools for efficient, shallow trenching. Common models like the Bradco 625, Lowe 750, and Bobcat trencher attachments dig 36–60 inches on mid-size machines. Heavy-duty trencher attachments with long booms on high-flow machines can reach 72 inches — but this requires 25+ GPM of hydraulic flow and a machine large enough to handle the forces involved without the rear end lifting.
A backhoe — whether a dedicated unit like a John Deere 310 or a skid steer equipped with a backhoe attachment (different from a trencher) — digs by bucket swings rather than chain cutting. A standard backhoe excavates to 12–14 ft without extension. Maxi-dig configurations reach 18 ft. The bucket can navigate around obstacles, cut precise corners, and dig non-linear paths that a chain trencher cannot follow.
Canada's frost depth requirements drive most of the "how deep does this have to go?" questions for residential and agricultural trenching. The National Building Code of Canada sets minimum burial depths for water supply piping, and many municipalities have stricter local requirements.
| Region | Design Frost Depth (approx.) | Typical Water Line Depth Required |
|---|---|---|
| BC Coast (Vancouver, Victoria) | 0.5–1.0 m (2–3 ft) | 1.0–1.2 m (3–4 ft) |
| BC Interior (Okanagan, Kamloops) | 1.0–1.5 m (3–5 ft) | 1.5–1.8 m (5–6 ft) |
| Southern Ontario, Greater Toronto | 1.2–1.5 m (4–5 ft) | 1.5–1.8 m (5–6 ft) |
| Northern Ontario, Quebec | 1.5–2.0 m (5–6.5 ft) | 1.8–2.1 m (6–7 ft) |
| Alberta (south) | 1.5–1.8 m (5–6 ft) | 1.8–2.1 m (6–7 ft) |
| Saskatchewan, Manitoba | 1.8–2.1 m (6–7 ft) | 2.1–2.4 m (7–8 ft) |
| Yukon, NWT, Nunavut | 2.5–4.0 m+ (8–13 ft+) | Site-specific engineering required |
The numbers are blunt: in most of Ontario, Alberta, Saskatchewan, and Manitoba, water lines need to go 5–7 ft below grade. A standard skid steer chain trencher that reaches 4–5 ft is not deep enough in these regions for frost-proof water lines. A backhoe is the required tool.
| Spec | Skid Steer + Chain Trencher | Dedicated Backhoe (e.g. JD 310) |
|---|---|---|
| Max trench depth | 36–72 inches (3–6 ft typical) | 12–14 ft (standard), 18 ft (maxi-dig) |
| Trench width | 4–18 inches (chain width) | 12–24 inches (bucket width, varies) |
| Trenching speed (open ground) | Fast — 50–100 ft/hr on good soil | Moderate — slower cycle, more precise |
| Precision around utilities | Low — chain cannot stop on a dime | High — bucket controllable for hand-expose work |
| Spoil handling | Chain throws spoil to side (usually manageable) | Bucket places spoil — more control over placement |
| Transport | Standard equipment trailer (same as machine) | Dedicated transport (backhoe is heavy 17,000–26,000 lbs) |
| Mobilization cost | Low (already own/have the skid steer) | Higher — separate machine, separate trailer |
| Rocky ground performance | Poor to moderate (chain wears, teeth break) | Good with rock bucket; rock wheel trencher available |
| Rental rate (CAD/day) | $200–$400 for trencher attachment | $700–$1,200 for backhoe |
Access is often the deciding factor when depth alone doesn't make the decision obvious. A backhoe is a large machine — a John Deere 310 or CAT 416 weighs 16,000–22,000 lbs and is roughly 7–8 ft wide. Getting it into a tight backyard, between buildings, or through a residential gate is often impossible without significant ground protection or site preparation.
A skid steer with trencher attachment travels in the same footprint as the skid steer itself. If the machine has been working the site for other tasks, the trencher attachment drops on in minutes and the machine is ready. No additional mobilization cost, no separate trailer, no separate machine rental.
For contractors who already own a skid steer, the incremental cost to add trenching capability is just the attachment cost — typically $4,000–$12,000 CAD for a quality chain trencher for a mid-size machine. That changes the economics of shallow trenching work significantly.
Estimating cost per linear foot involves mobilization, machine time, operator time, and backfill. These numbers are approximate for Canadian market conditions (2025–2026).
| Scenario | Skid Steer Trencher | Backhoe |
|---|---|---|
| 200 ft shallow utility (18–36 in), already own SS | $2–$5/ft (attachment amortized) | $8–$15/ft (separate mobilization) |
| 200 ft water line at 5.5 ft (prairie frost depth) | Not achievable with standard trencher | $12–$20/ft |
| 100 ft septic lateral at 4 ft | $4–$8/ft (if machine has depth) | $10–$18/ft |
| 50 ft foundation drainage at 6–8 ft | Not achievable | $20–$35/ft (precision work, slower) |
Septic installation in Canada is regulated provincially. In Ontario, the Ontario Building Code requires septic system setbacks and typically places septic tank inlets at 4–6 ft below grade depending on site conditions. In Alberta, the Private Sewage Systems Standard of Practice sets depth requirements that often push 5–7 ft. In most cases, septic installation is backhoe work — both for the tank excavation and the distribution field.
The exception is the septic distribution field itself (leaching bed), which runs at shallow depth — often 18–36 inches. Some contractors trench the distribution laterals with a skid steer trencher after the tank is excavated with an excavator or backhoe. This is a practical approach that can reduce the amount of time the larger machine is needed on-site.
Prairie municipalities have some of the deepest water line requirements in North America. Lloydminster (AB/SK border), for example, requires water lines at 2.5 m (8.2 ft) below grade. Backhoe minimum — in fact, many prairie water line contractors prefer excavators for this work rather than backhoes. Skid steer trenchers are not the tool in these regions for water line burial.
In southern Ontario and BC, water line burial requirements are often 1.5–1.8 m (5–6 ft). At the shallower end of this range, a heavy-duty skid steer trencher attachment on a large machine can reach depth — but it's marginal, and many contractors don't want to be at the machine's limit for work that has code compliance implications.
Farm drainage tiling in Manitoba, Saskatchewan, and Alberta typically goes at 3–4 ft depth — achievable with a mid-size skid steer trencher. This is a significant market for skid steer trencher attachments in the Prairie provinces. Cover crop irrigation lines at 18–24 inches are universally within skid steer range.
If your job calls for shallow to mid-depth trenching and you already own a skid steer, a quality trencher attachment can be a high-ROI addition to your fleet.
The practical Canadian summary: If you're in BC doing irrigation and shallow utility work, a skid steer trencher is a legitimate primary trenching tool. If you're anywhere in the prairies or doing residential water or septic work, you'll be calling the backhoe — the depth requirements are not negotiable. For many contractors, the skid steer trencher is the right tool for 30–40% of their trenching volume; a rented backhoe handles the rest.
A standard backhoe like a John Deere 310 or CAT 416 excavates to 12–14 feet, with maxi-dig configurations reaching 18 feet. A skid steer chain trencher attachment reaches 36–60 inches on mid-size machines, with heavy-duty setups reaching 72 inches on high-flow machines. The depth gap is substantial and drives most trenching decisions in Canadian frost-depth conditions.
In most of Ontario, Alberta, Saskatchewan, and Manitoba, water supply lines must be buried 5–7 feet below grade to remain frost-free. This exceeds the reach of most standard skid steer chain trenchers (4–5 feet) in these provinces. A backhoe is the required tool for frost-proof water line burial across most of the Canadian Prairies.
A quality chain trencher attachment for a mid-size skid steer typically runs $4,000–$12,000 CAD depending on the brand and cutting depth. For contractors who already own a skid steer, this represents the incremental cost to add trenching capability — no additional mobilization, no separate trailer, and no separate machine rental for shallow trenching work.
A skid steer trencher is the better choice when depth requirements are within its range (under 5 feet), when the machine is already on-site for other work, when access constraints prevent a large backhoe from reaching the trench area, and for Prairie farm drainage tiling at 3–4 feet depth. In BC where irrigation and shallow utility work are common, a skid steer trencher can be a legitimate primary trenching tool.
For operators who already own a skid steer, shallow trenching with a chain trencher attachment has zero additional mobilization cost compared to renting or calling a separate backhoe. The incremental cost is just the attachment — $4,000–$12,000 CAD — versus ongoing rental costs or subcontracting fees. For frequent shallow trenching work, this makes the skid steer trencher a high-ROI attachment addition.
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