Gravel, Stone and Soil for Kalawao County, HI
Hawaii Rock Supply brings gravel, stone and aggregate delivery in Kalawao County, HI. Start with base course, the crushed basalt layer that island yards and county public works books call the compacting layer under flatwork.
Runoff here arrives as gulch flow off wetter ground rather than rain falling where it lands. Clay that has cracked open through the dry months takes that water badly.
Ground Conditions Across Kalawao County
Across the Molokai and Lanai ground region, expansive clay of the Lualualei type and old plantation red dirt sit under the dry flats. Deeply weathered clay covers the wet ground, and steep, thin soils sit below the north-shore cliffs.
An under-built base on that clay moves. Water reaches the flats as gulch flow rather than as rain landing where it falls, so a drive or pad has to shed water instead of trapping it.
Bare leeward ground loses red dirt to sheet and wind erosion. Gulches flash in winter storms, and exposed shorelines take wave and surge.
Work runs year round. Winter storms are when the gulches run and the red dirt moves, so plan around that window.
Materials Delivered in Kalawao County
Order by project. A driveway takes a compacting layer and a wearing surface.
A patio or slab takes a compacted base, a bedding layer and joint material. A drain takes clean stone that water moves through.
Base course carries the most weight in the ground here. In Hawaii it is crushed basalt.
Subsection 703.17 covers subbase as gravel, stone, basalt or coral, and Subsection 703.18 covers filter material as hard, durable lava rock. Section 304 covers placing aggregate base course.
Other materials fill in the rest. Cinder is an island material with no mainland equivalent, used on paths, garden beds and planter mixes.
3/8 inch chips top a compacted base and bed pipe.
Coral Fill is crushed coral limestone from quarried inland caprock, specified as subbase rather than as base course. Washed Sand beds and levels under slabs.
Choosing the Right Material
Match the stone to the job. A driveway wants a compacting layer under a wearing surface.
A patio wants bedding and joints that lock. A drain wants clean, open stone.
- Driveway: base course for the compacting layer, Driveway Gravel to surface it.
- Patio or slab: base course, then screenings for bedding and joints.
- Drain: drain rock or #67 Stone, both clean and open.
- Bulk fill: coral fill to raise grade under a base course layer.
Blue rock and chips are both clean crushed basalt, but they work differently. Blue rock at 3/4 inch suits drainage beds and drive surfacing.
Chips at 3/8 inch suit topping, pipe bedding and paths.
Watch the material properties. Fines-bearing stone binds and compacts, so it makes a base.
Clean open stone drains, so it makes a drainage layer. Rounded stone does not lock together.
Delivery Across Kalawao County
Order online. Pick the product, choose a quantity by the ton or by the yard, and set a delivery date at checkout.
A dump truck tips the load on site in one pile.
Each product page has a calculator to help size the load. Bulk delivery covers Kalawao County, and the truck reaches the site the same way any other load does.
Order Base Course and Aggregate for Kalawao County
Base course is the crushed basalt layer that holds up a drive, a pad or a slab, and it is the material to start with on this ground. Hawaii Rock Supply delivers it across Kalawao County, along with the stone, sand and soil that finish the job.
Order online and set your delivery date.