Base Gravels
& Grading.
Precision Below. Performance Above.
The base determines everything. PSI's in-house grading crew uses GPS-guided equipment, controlled aggregate sourcing, and verified compaction to build the foundation your asphalt or concrete surface depends on — accurate to spec, every time.
Your pavement is only as good as
what's underneath it.
A perfectly paved surface over a poorly built base will fail — it's that simple. Rutting, cracking, settlement, and drainage problems almost always trace back to inadequate base preparation. The gravel base is the structural backbone of every road, parking lot, and driveway.
PSI treats base gravels and grading as the most critical phase of any paving project — not a step to rush through before the asphalt truck arrives. We source controlled aggregate, place it in engineered lifts, grade to GPS-verified tolerances, and compact to documented density standards. The result is a base that drains properly, distributes loads evenly, and supports decades of traffic.
Because our grading crew works directly with our excavation and paving teams, there's no gap between trades. The same team that shapes your base is coordinating with the crew that paves it — keeping the project tight, efficient, and built to last.
everything above it performs.
From subgrade to
pave-ready surface.
PSI manages every phase of base preparation in-house — material sourcing, placement, grading, compaction, and verification — so the surface your pavement sits on is built right the first time.
Millimetre accuracy.
Every slope. Every drain.
Grading isn't just about making the surface flat — it's about controlling where water goes. Even a few millimetres of grade error can cause ponding, accelerate deterioration, and undermine the entire pavement structure. PSI's GPS-guided grading ensures every slope, cross-fall, and tie-in is accurate to spec before a single tonne of asphalt is placed.
From residential driveways to MMCD and MoTT-standard municipal projects, PSI's grading crew delivers the precision your project demands — with full documentation and testing to prove it.
Request a Quote
Parking lots. Roads. Driveways.
It all starts with the base.
PSI provides base gravel placement and precision grading for every type of paving project — from residential driveways and strata parking lots to municipal roads, highway shoulders, and commercial developments. We also prepare bases for concrete curb and gutter, sidewalks, and mixed-surface projects.
Whether the spec calls for standard road base, engineered fill, or recycled aggregate from a stabilization project, PSI sources, places, and compacts the right material for the job — and documents the results to prove compliance.
Own equipment. Own crew.
Built to spec, verified to prove it.
PSI's grading team operates in-house with our own fleet of GPS-equipped graders, rollers, and support equipment. That means faster mobilization, tighter coordination with excavation and paving, and direct accountability at every stage.
Base Gravels & Grading
Frequently Asked Questions
Common questions about base preparation and grading services in the BC Interior.
The gravel base is the structural backbone of your pavement. It distributes traffic loads across the subgrade, provides drainage, and prevents the surface from settling or cracking. Without a properly built base, even the best asphalt will fail prematurely.
Yes. PSI uses GPS and laser-guided grade control on every project. This ensures accurate elevations, slopes, and cross-falls — reducing rework, eliminating guesswork, and ensuring proper drainage from the start.
Compaction is verified through nuclear density testing or Proctor testing as required by the project specifications. All results are documented and available to engineers, inspectors, and clients to confirm compliance with MMCD, MoTT, or custom design standards.
We source controlled, properly graded aggregate from trusted local suppliers — typically ¾" road base or engineered crushed gravel, depending on the project spec. Consistent gradation is critical for compaction performance and long-term base stability.
Base thickness depends on traffic loads, soil conditions, and the engineered design. Residential driveways typically require 100–150mm of compacted base, while commercial parking lots and roads may require 200–300mm or more. PSI determines the correct depth during the site assessment.
Yes. PSI routinely works under municipal specifications and with engineering consultants to complete projects that meet or exceed MMCD, BC MoTT, and custom design standards. Documentation, testing, and reporting are included as standard practice.
Yes. PSI handles excavation, base gravel placement, grading, compaction, and asphalt paving — all in-house with our own crews and equipment. One team from dig to drive.
If the subgrade is unstable, saturated, or composed of poor soils, PSI can coordinate soil stabilization, geotextile fabric installation, or additional base depth before placing gravel. We identify these conditions during excavation and address them before they become a problem.
Yes. PSI prepares bases for both asphalt and concrete surfaces, including concrete curb and gutter, sidewalks, and mixed-surface projects. We ensure consistent elevations and compaction between materials for a seamless, long-lasting finish.
PSI provides base gravel and grading services across the BC Interior, including Kamloops, Salmon Arm, Sun Peaks, Chase, Sorrento, Blind Bay, Enderby, Armstrong, Vernon, Sicamous, Revelstoke, and the North and South Shuswap.
Base prep done right.
Every time.
PSI provides honest assessments and free quotes for base gravel and grading projects across the BC Interior.
778.200.2166