Decorative Stone & Boulders
Armor Rock Large Boulders (2-3 Ton)
Also known as: Armor Stone, Large Armor Stone, Rip Rap Boulders, Rock Armor
Armor Rock Large Boulders run 2 to 3 tons per stone - quarried, angular rock at the top end of the armor stone range. They're used to hold ground that water wants to take: shoreline edges, streambanks, slope toes, and channels where smaller stone would wash out. At this size, each boulder is set individually with a machine, so it stays where it's placed and takes the force head-on.
Applications
- Shoreline & Streambank Stabilization
- Erosion & Scour Protection
- Slope Toe & Channel Armoring
- Retaining & Grade Work
- Landscape Feature Boulders
- Water Features & Ponds
Why It Works
Heavy enough to stay put when the water moves.
A 2 to 3 ton boulder doesn’t move because there’s no practical force on a Hudson Valley shoreline or streambank that can lift it. Weight is the whole point. Where smaller riprap can be carried off in a high-flow event, a stone this size sits where the machine sets it and absorbs the energy of the water instead of giving way to it.
The angular faces matter as much as the weight. Quarried armor rock has broken, irregular edges that bite into the soil and against each other, so the boulders interlock and trap material between them rather than rolling. That’s why angular armor stone holds a slope and rounded field stone slides off it. Set over a proper filter layer, it protects the soil underneath from washing out from behind.
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