Lightweight fill for highways, bridges and rail

Yes. It is listed as an accepted product under Lightweight Fill Material in the BC Ministry of Transportation and Transit Recognized Products List, October 1, 2026 edition, as product 1414.^[1]

No. Enviro-Rock has no approval in Washington, Oregon, California or Alaska, so acceptance there rests with the project owner and the engineer of record. New York and Indiana have published specifications for foam glass aggregate fill, and Maine DOT has used a project special provision; they show what a state agency checks.^[13][14][4]

Yes, it is buoyant, so specifications place it above the water table or hold it down with cover material.^[15] Maine DOT does not allow the fill to be submerged until it is ballasted.^[4] At Jim Lorimer Park in Burnaby, where the site floods seasonally, the design anchored the fill against uplift.^[16]

Heavy or vibratory compaction can, so the method is controlled. Enviro-Rock goes down in 300 to 600 mm loose lifts under a static roller with no vibration, or 150 to 300 mm under a plate compactor with more passes rather than more vibration, and is compacted 10 to 20%; jumping jacks are not used.^[17][18]

Reports are available on request for bulk density, water absorption, gradation, CBR, thermal resistivity, freeze-thaw and confined compressibility.^[19]

Illinois Tollway research found that shipping distance significantly affects the cost of foam glass aggregate: in its example, an 800-mile haul added about $34 to an in-place cubic yard costing $169.^[15] Enviro-Rock is delivered from its BC facilities, including a stockpile in the Fraser Valley^[20], with pickup from Quesnel by appointment.^[21]