Moncton’s growth from a shipbuilding outpost along the Petitcodiac River to a major transportation hub for the Maritimes left behind a patchwork of fill materials, buried organic layers, and old infrastructure that maps rarely capture. The famous tidal bore may define the river, but beneath the city’s expanding residential and industrial lots, the ground tells a far more complicated story. When a geotechnical report relies solely on borehole data, it often misses what a simple test pit excavation would reveal at a glance: construction debris from the 1960s, a forgotten culvert, or stratified silt that simply does not behave like the surrounding till. Our team uses exploratory test pit investigations to bridge that gap—giving you a direct, visual record of what lies beneath before the excavator bucket ever hits the ground. When conditions get tricky, we often combine these findings with deeper CPT testing to correlate the visual profile with continuous penetration resistance.
Seeing the soil profile with your own eyes eliminates the uncertainty no laboratory report can fully resolve—especially in a river city with 250 years of buried history.
Technical details of the service in Moncton
Critical ground factors in Moncton
Moncton sits at an elevation of roughly 20 meters above sea level near the river, which means a high water table is not a possibility—it is the baseline condition across much of the city. Add to this the layered silts and soft clays deposited by centuries of tidal flooding, and you have a recipe for trench instability that catches off-guard anyone accustomed to the dense tills of central New Brunswick. An unshored test pit in saturated ground can collapse in seconds, and the geotechnical risk extends beyond safety: failing to identify a thin organic lens at footing depth has led to differential settlement claims that stalled commercial projects for months. The 2019 flood event along the Petitcodiac reminded everyone how quickly subsurface water levels can rise. A properly executed exploratory pit program anticipates these conditions, specifying shoring or a safe standoff distance before the first scoop is taken.
Our services
Our exploratory test pit work in Moncton is structured around two core service levels, depending on whether you need a quick visual check or a fully documented geotechnical record for permit submission.
Utility & Fill Verification Pits
Short-duration excavations on commercial and residential lots to confirm backfill quality, locate buried foundations, or verify utility clearances. We provide same-day verbal feedback plus a concise field memo with annotated photographs and a soil log.
Full-Log Geotechnical Test Pits
Comprehensive excavations with detailed wall logging, in-situ density testing, bulk sampling for laboratory analysis, and groundwater monitoring. The final report includes cross-sections, USCS classifications, and foundation recommendations aligned with NBCC requirements.
Common questions
How much does an exploratory test pit typically cost in the Moncton area?
For a standard test pit investigation in Moncton, including equipment mobilization, excavation, soil logging, and a summary report, costs generally fall between CA$670 and CA$1,120 per pit. The final figure depends on access constraints, depth required, and whether you need additional testing like sand cone density measurements.
How deep can you go with a test pit in Moncton's soils?
With a standard hydraulic excavator we routinely reach 4.0 to 4.5 meters in the compact silty sands and glacial till found around Moncton. In areas with a high water table—common near the river and in parts of Dieppe—practical depth may be limited to 2.5 or 3.0 meters before water ingress makes safe logging difficult without dewatering.
Do I need a test pit if I already have borehole data from an SPT investigation?
Boreholes give you point-specific data on strength and stratigraphy at depth, but they miss lateral variations that a continuous trench wall exposes. We often recommend a few exploratory test pits to complement an SPT drilling campaign, especially when transitioning from a parking lot to a load-bearing slab where buried fill or organic pockets can vary dramatically over short distances.