A stone slinger truck, also called a rock slinger, gravel slinger, or conveyor aggregate delivery truck, is a specialized material placement vehicle with a remote-controlled high-speed conveyor belt that rotates and precisely places material exactly where it needs to go. Instead of dumping a pile and moving it by hand, the slinger arm places material up to 90 feet from the truck and places material accurately in tight, awkward, or inaccessible areas with trained operators using remote control systems.
The result: faster placement, less labor, cleaner job sites, and more precise positioning than any dump truck or manual method can provide. For contractors and builders working on tight schedules, a stone slinger truck is one of the highest-leverage tools on a job site.
Ground Solutions has operated stone slinger trucks in Colorado since 2003. What started as a single truck serving residential concrete contractors in Northern Colorado has grown into a full fleet serving commercial, municipal, industrial, and energy projects across the Mountain West.
Our standard over-the-road stone slinger trucks carry up to 25–30 tons of material. Once on site, the operator uses a remote control to drive the truck and position the conveyor belt without ever moving it manually. That precision matters when you’re working around vapor barriers, plumbing runs, and conduit that can’t be disturbed or driven over.
For larger projects or sites with restricted access – behind buildings, on slopes, around existing structures – we deploy our on-site “OS7” slinger units. Equipped with a 7-yard hopper, four-wheel remote drive, and off-road tires, these units navigate where conventional equipment can’t go and allow precise positioning, smooth operation, and continuous material flow, helping crews reduce downtime and keep projects moving until the job is done.
One of the most common applications for our slinger trucks is placing gravel beneath concrete slabs for residential foundations and commercial builds. This includes radon rock placement – the aggregate layer beneath the slab that allows radon gas to move freely and vent safely through the plumbing system rather than accumulating inside the structure.
We offer a true turnkey service: we purchase the material, deliver it, place it using our stone slinger, and laser-grade it so your concrete contractor can start pouring the moment we leave. No skid-steer required. No material pile left on site. On smaller pours our over-the-road slinger handles the full job in hours. On large commercial pours we can place and grade up to 500 tons per day – roughly 25,000 square feet.
Anything requiring precise backfill in a confined or sensitive space is a natural fit for a stone slinger truck. We’ve backfilled in-ground pools inside fenced yards with mature landscaping, placed aggregate around underground fuel and septic tanks, and completed StormTech chamber system backfill at scale – all without disturbing the surrounding area. Did you know that cylinder tanks cannot be adequately backfilled with dirt? Aggregate must be used to prevent voids and settling. Our crews have 15+ years of underground backfill experience and know the right material for every application.
Ready to put a stone slinger to work on your next project? Fill out the form below or give us a call. We respond fast with availability and pricing.