Order Base Course and Crushed Stone in Kauai County, HI
Planning a driveway, a slab base or a drainage run? Hawaii Rock Supply handles gravel, stone and aggregate delivery in Kauai County, HI.
Start with base course, the compacting layer island yards and county public works books call for under flatwork.
Here that means crushed basalt, sold by nominal size and hauled to Kapaa, Lihue, Kalaheo, Kilauea, Koloa and Princeville.
Ground Conditions Across Kauai County
Kauai County spans more than one ground region, so the base question changes with where you build.
In the east and north, including Kapaa, Lihue, Kilauea and Princeville, you are on highly weathered, acid Oxisol clay over the old Waimea shield slopes. There is alluvium in the Wailua and Hanalei valleys and wet organic ground on the upper slopes below Waialeale.
That is the sharpest rainfall gradient anywhere in the islands. Waialeale averages roughly 400 inches a year a few miles inland of coastal towns that take a fraction of that.
Leached clay underneath holds water rather than shedding it, so the ground stays soft long after the rain stops. Drainage stone earns its place under any slab or drive.
In the south and west, around Kalaheo and Koloa, you get fertile lowland soils and red clay on the south slopes. Drier, dustier old plantation ground runs west toward Waimea and Kekaha.
Erosion follows the same split. The east and north side sees river and gulch flooding, hillside slips on saturated clay, and wave and surge damage on the north shore through the winter swell season.
The south and west side sees flash flow in gulches that are dry most of the year, wind-blown dust off bare red dirt, and shoreline erosion.
Work runs year round on both sides. Winter brings the heaviest fronts and the highest flood risk along the Hanalei and Wailua rivers, while Kona storms are when the normally dry gulches run and the red dirt turns to mud.
Materials Delivered in Kauai County
Base course carries the weight. In Hawaii it is specified as base course, and the state highway aggregate section sets Subsection 703.06 Aggregate for Untreated Base as crushed stone graded to a 2-1/2 inch, 1-1/2 inch or 3/4 inch maximum nominal size.
Section 304 covers placing aggregate base course. You will also hear it called 3/4 inch minus base course or untreated base, and it is crushed basalt.
Order 3F Base Course for driveways, parking pads, and slab and shed bases.
The supporting materials do the rest of the work on an island job.
Sand, soil and fill round out a delivery. Island masonry sand is generally manufactured from crushed basalt or blended with calcareous sand, and sand from a brackish source is washed with fresh water before it goes into concrete work.
Crushed coral limestone sold here comes from quarried inland caprock and is specified as subbase rather than as a base course material. Order Coral Fill for bulk fill, raising grade and sub-base under a base course layer.
For a growing layer, Garden Soil goes into raised beds and planters, often over a cinder layer for drainage.
Delivery Across Kauai County
Everything is ordered online. You choose a quantity by the ton or by the yard, use the calculator on the product page to size the load, and pick a delivery date at checkout.
A dump truck then tips the load on site.
Coverage runs to Kapaa, Lihue, Kalaheo, Kilauea, Koloa and Princeville.
Choosing the Right Material
Base course is the compacting layer under drives, parking pads and slab bases. Blue rock is clean crushed basalt for drainage beds and trench bottoms.
Cinder is lighter and decorative, and screenings bed pavers and fill joints.
Where the ground is soft or wet, drain rock and larger open stone move water away from the base. Where you are raising grade before a base layer goes down, coral fill does that work first.
Should I order material by the ton or by the yard?
Either works. Both units appear on the product pages, and the calculator on the page lets you size the load the way your project is measured.
Have your area and the depth you are building to ready before you start, then order in whichever unit you prefer.
Which stone is best for drainage in Kauai County?
Drain rock, also called filter rock or lava rock, is the drainage stone here. Island filter and drainage stone is durable lava rock, and it suits drywells, rock pits, French drains and foundation drains.
Blue rock and #67 stone also work for open drainage and pipe bedding where a clean crushed basalt is what the job calls for.
What do I need to have ready for a bulk delivery?
Have the quantity decided and a delivery date chosen at checkout. On the day, the truck tips the load in one pile, so leave clear room for it to reach the spot you want the material dropped.
Keep the path wide enough for a dump truck to get in and out.
Order Base Course, Gravel and Stone for Kauai County
Start with the product page for the material your job needs, then use the calculator there to turn your area and depth into a quantity. Order by the ton or by the yard, choose a delivery date at checkout, and Hawaii Rock Supply sends a truck to your site in Kauai County.