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The following information provides details about Ontario Trap Rock's product offerings as well as provincial and state DOT aggregate source numbers.
Trap Rock/Diabase is an aggregate that provide superior friction properties. It assists in building Voids in Mineral Aggregate (VMA) and allows for increased binder replacement (FRAP/RAP/RAS) content.

Ontario (DSM Inventory # B22-072)

  • HL-1 (5/8" clear)
  • DFC Fines
  • Unwashed Manufactured Sand
  • ¼" Chip

Michigan (MDOT Source # 95-10)

  • Aggregate Wear Index - 306
  • CS-1
  • CS-2
  • 25-A
  • 29-A
  • Washed manufactured sand
  • Unwashed manufactured sand

Illinois (IDOT Source # 52352-02)

  • CM-13
  • CM-14
  • CM-16
  • FM-22

Ohio (ODOT Source #4144-01)

  • ODOT #7
  • ODOT #8
  • ODOT #9

OTR's railroad ballast exceeds industry strength and durability requirements. Our railroad ballast forms the track bed upon which railroad ties are placed. Properly placed and maintained ballast holds track in place and facilitates drainage.
  • Mainline Ballast (2-1/2" x ¾")
  • Walkway Ballast

OTR's ready mix concrete is used in temperature sensitive and high abrasion resistant industrial applications. It has a freeze thaw dilation of -0.001 per Michigan Test Method 115.

Due to its chemical properties, OTR's products can be used as an ingredient to in the production of rockwool insulation.

Mineral Wool/Rockwool Products:

  • 3" x 4"
  • 4" x 6"

OTR's fine aggregates, such as Slurry Seal/Micro-Surface, provides friction properties to the finished surface and increases set time to reduce the duration of road closures.

Slurry Seal/Micro-Surface Products:

  • DFC Fines
  • Unwashed manufactured sand

OTR has an extensive inventory of boulders with sizes ranging from less than 12" to over 3.' Having our own boulder supply means our customers can enjoy savings by buying direct from the quarry as opposed to buying from a landscape supplier.

Customers can visit the OTR website to see all of the boulder sizes we offer and to select the right boulder size for their needs.