3/4 Blue Rock in Hawaii
Also sold as 3/4" Crushed Stone
Also known as: blue rock, 3/4 clean basalt
For Hawaii storm-drainage and base work, 3/4 Blue Rock offers a rough angular texture that compacts for steady support beneath finished surfaces.
- Size: Approximately 3/4 inch
- Type: Angular crushed stone
From $397.00 for 1 ton, delivery included
Larger loads cost less per ton: 500 tons is $25,175.00 ($50.35 per ton). Pick any quantity below for a delivered price.
Free delivery included
Free delivery anywhere in Hawaii
Pick a delivery date
Weekday delivery, earliest Sep 25
“Regraded a driveway on a lot in Waikoloa where the leeward side stays dry most of the year but the few storms that do come turn the grade into a chute. Twenty two tons of the three quarter inch went down as base across roughly two hundred fifty feet with a crown built into the middle so water sheds to both sides. The tandem trucks made three trips over two days since the street is narrow, and the drivers coordinated timing so cars weren't blocked. Half a year and one real storm later, the base hasn't shifted and the crown still works exactly as built.”
Gary H. · Verified Buyer
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Everything You Need to Know About 3/4 Blue Rock
Size and Grading
- Size
- Approximately 3/4 inch
- Type
- Angular crushed stone
The rough, angular texture of 3/4 Blue Rock gives exposed ground cover and working aggregate areas a plainly crushed-stone character. Beneath a driveway, pad, or landscape feature, those irregular faces fit together under compaction instead of rolling like rounded aggregate. The material also leaves open paths within the stone for drainage, making it suitable where runoff management is part of the work.
Windward and mauka lots can stay saturated in heavy red clay, while leeward ground may drain quickly through volcanic soil or coral. In either setting, storm runoff deserves attention because there is no meaningful ground frost to govern the job. Place the stone as a compacted layer below the finished surface, with drainage directed away from the work area rather than left to collect in the base. This is useful around the Koolau Range, the Hamakua Coast, and other locations where frequent rain can keep ground conditions wet.
Quickly Calculate How Much You Need
Material: 3/4 Blue Rock
How to Measure
Measure the length and width of your project area in feet
Decide on depth in inches (2" for landscaping, 4" for driveways)
Enter the values above and we'll calculate the tonnage you need
Need help figuring out the right amount? We can help!
Call or text us at our contact form and we'll help you calculate the right quantity for your project.
Not sure how much you need? The Stone Calculator has depth guides, coverage charts and worked examples for this material.
Common Uses
Driveway & Road Base
For road and driveway subbase, place 3/4-inch crushed stone below the finished surface and compact it. The layer helps carry vehicle traffic and reduces wear on the surface over time.
Foundation Base Material
For home footings and commercial pads, use 3/4-inch crushed stone as the supporting layer. It carries loads while letting water pass through, which is useful for foundation preparation.
Water Drainage
Because 3/4-inch crushed stone has angular, uniformly sized pieces, it holds together while leaving pathways for water. It is used for French drains, utility trench fill, and stormwater control, including runoff work on windward lots.
Retaining Wall Backfill
Behind block, timber, and stone retaining walls, 3/4-inch crushed stone provides backfill support while allowing drainage. Proper sizing helps balance water flow and stable backfill.
Why Choose 3/4 Blue Rock
Superior Compaction
Compaction presses the uneven, angular pieces of 3/4-inch crushed stone together into a stable layer. That interlocking action helps limit movement, ruts, and erosion under heavy traffic.
Excellent Drainage
With 3/4-inch material, the spaces between stones let water pass through instead of collecting at the surface. This can limit puddles and water exposure near structures and foundations.
Project Applications
3/4-inch crushed stone fits base layers for driveways as well as drainage work. Its size works across many common site applications.
Material Performance
Use bulk 3/4-inch crushed stone where a compacted base or drainage layer is needed. After installation, maintenance needs can be limited.
Frequently Asked Questions About 3/4 Blue Rock
Customer Reviews
Truck couldn't reach so we hauled it
Wanted this for a farm turnaround out past Kekaha. The truck couldn't make the last stretch of our dirt lane and dumped the whole ten tons at the main road, so we spent days moving it by tractor.
Douglas E. · Kekaha, HI · Verified Buyer
No more puddles by the tables
Put four tons from Hawaii Rock Supply under a patio expansion behind our shop in Paia where customers park during the farmers market on weekends. Base layer went in over a weekend, compacted tight with a plate tamper borrowed from a neighbor. No puddling anymore even after the market crowd tracks through on a rainy Saturday, and the surface feels solid under the tables.
Ronald P. · Paia, HI · Verified Buyer
Driver showed up before we were ready
Redid the base under our carport slab in Mililani, ordered six tons off the online calculator. Delivery showed up right at the start of the window before we'd even moved the cars out of the way, so the driver had to wait almost twenty minutes. Once it was all down it packed hard and the slab poured without a hitch.
Katherine S. · Mililani, HI · Verified Buyer
Rebuilding the driveway held up fine
Rebuilding a driveway base for a property in Lahaina and needed something that would hold up on the slope down to the road. Eight tons of three quarter inch from Hawaii Rock Supply compacted in nicely over two passes with a rented roller. Drains fast in a downpour and hasn't rutted at all through the first rainy stretch since we finished.
Priscilla W. · Lahaina, HI · Verified Buyer
Crown still shedding water after the storm
Regraded a driveway on a lot in Waikoloa where the leeward side stays dry most of the year but the few storms that do come turn the grade into a chute. Twenty two tons of the three quarter inch went down as base across roughly two hundred fifty feet with a crown built into the middle so water sheds to both sides. The tandem trucks made three trips over two days since the street is narrow, and the drivers coordinated timing so cars weren't blocked. Half a year and one real storm later, the base hasn't shifted and the crown still works exactly as built.
Gary H. · Waikoloa, HI · Verified Buyer
3/4 Blue Rock has 5 verified customer reviews with an average rating of 4.6 out of 5.
