New Westminster sits at just 60 meters above sea level on the north bank of the Fraser River, a position that has shaped its development since 1859. The city’s hillside terrain and proximity to active waterfronts mean that compaction control is not just a specification checkbox—it is what keeps retaining walls standing and pavements intact through wet winters. When fill is placed behind a new foundation or utility trench is backfilled along Columbia Street, the sand cone density test provides the direct, physical verification that no nuclear gauge can match. In our experience across the Royal City, the difference between 95% and 92% compaction often shows up two years later as a cracked sidewalk or a settled service connection. We run each test according to ASTM D1556 and D698, combining field density measurement with laboratory Proctor curves to give you a defensible, auditable result that the city’s building officials recognize without hesitation. For deeper site characterization before placing structural fill, we often pair this test with a CPT investigation to map out the stratigraphy that will receive the engineered fill.
In New Westminster’s variable glacial soils, a properly executed sand cone test remains the most defensible method for compaction acceptance—no calibration curves, no radiation, just mass and volume.
