Use crushed stone for structural, load-bearing and concrete work, and use clean, washed gravel for drainage and decorative uses. The reason comes down to shape: angular crushed particles lock together for stability, while rounded gravel particles drain freely but shift under weight. Below, we translate that rule into supplier language and a checklist you can bring to the yard.
TL;DR:
- For a driveway, specify a #4 subbase, #57 middle layer, and crusher run or DGA wearing course; adjust total depth for soil conditions.
- For French drains, order clean, washed, single size 3/4 inch stone and wrap it in geotextile fabric to keep soil out.
- For concrete, ask for #8 crushed stone; rounded gravel may require mix adjustments and retesting to meet the same strength targets.
- Compact aggregate in 4 to 6 inch lifts, slightly damp, with a plate compactor for small areas or a vibratory roller for larger sites.
- Compare prices per ton and per cubic yard, and ask about delivery minimums; quarry distance and transport often affect the bill more than material choice.
Table of Contents
- Physical differences: particle shape, texture, and fines
- Common grades and names you will hear at the supplier yard
- Performance and best uses: driveways, drainage, concrete, and walls
- Cost, availability, and delivery: realistic budgeting tips
- Installation and compaction best practices
- How to choose: checklist and supplier questions to ask
- Contractor perspective: practical defaults and on-the-ground lessons
- Tri-State Brush Control & Gravel: how we can help with supply and installation
- FAQ
- Sources
Physical differences: particle shape, texture, and fines
Crushed stone is mechanically broken rock, usually limestone or granite, with sharp edges and flat faces. Gravel forms naturally from water and weather, so river rock and pea gravel come out smooth and rounded. That one difference in shape explains almost everything about how each material behaves on a job site.
Angular crushed particles lock into each other when compacted, which is why granular base specifications call for a crushed stone content exceeding half of the coarse aggregate to resist rutting under traffic. Rounded gravel particles roll past each other instead of locking, so they drain well but never compact into a firm, stable surface.
Fines, the fine particles mixed into a load, change the story again:
- In crusher run or dense-graded aggregate, fines fill the gaps between larger stones and bind the material into a solid, compactable base.
- In drainage applications, those same fines clog pore space and choke water flow, which is why drainage stone is specified clean and washed.
One figure worth remembering: base aggregate specifications recommend material with at least two fractured faces and predominantly crushed stone for pavement structures, a standard that explains why contractors default to crushed stone under driveways and roads.
Common grades and names you will hear at the supplier yard
Supplier yards use grade numbers, not generic labels like "gravel" or "stone," and knowing a few of them prevents ordering mistakes.
- #57 stone: a mid-size, single-size crushed stone (roughly 1 inch) used for drainage layers and driveway middle courses.
- #8 stone: a smaller crushed stone used in concrete mixes and as a decorative topping.
- #4 stone: a larger crushed stone used for sub-base layers and drainage around foundations.
- Crusher run or DGA (dense-graded aggregate): crushed stone with fines included, compacts hard, and is the standard driveway base and wearing course.
- Pea gravel: small, rounded, smooth stone used for walkways and decorative beds, not for anything load-bearing.
- River rock: larger rounded stone used almost entirely for landscaping and drainage swales.
Washed material has had the fines rinsed out, which matters anywhere water needs to pass through. When you call a yard, say exactly what you need: "washed 3/4 inch" for a French drain, "crusher run or DGA" for a driveway base, or "#8 crushed" for a concrete pour. Specific phrasing gets you the right material the first time.
Performance and best uses: driveways, drainage, concrete, and walls
Matching material to application is where most driveway and drainage failures get decided, often before the first shovel hits the ground.
- Driveways: build in layers, typically a #4 sub-base, a #57 middle layer, and a crusher run or DGA wearing course, with overall thickness adjusted depending on soil conditions. Crushed stone is preferred throughout because it locks together and resists rutting under vehicle weight.
- Drainage systems: use washed gravel or washed single-size crushed stone, never a dense-graded mix, because fines will clog the voids water needs to travel through. Wrapping the stone in geotextile fabric keeps soil from migrating in over time, a detail covered well in this paver patio drainage guide.
- Concrete aggregate: crushed stone is usually specified because angular aggregate bonds more effectively with cement paste than rounded gravel, producing higher compressive and flexural strength. Mixes built with gravel instead often need adjustment and retesting to hit the same strength targets.
- Landscaping and decorative beds: gravel, especially pea gravel or river rock, is the sensible choice for appearance even though it needs more raking and refilling over time than crushed stone.
Pro Tip: When in doubt about which layer needs which material, ask your supplier to spec the job as a standard three-layer driveway section rather than guessing at depths yourself.
Cost, availability, and delivery: realistic budgeting tips
Material costs vary by region and quarry distance, which is why two quotes for the same job can look very different. Crushed stone and crusher run commonly fall into overlapping price ranges, but transport is usually the bigger line item, since aggregate is heavy and priced per ton-mile.
- Ask whether pricing is per ton or per cubic yard, since suppliers quote both and the numbers are not interchangeable.
- Ask about delivery minimums, since small loads often carry a flat surcharge that makes a second order worthwhile instead.
- Ask whether the material is screened and whether it is washed, since both affect price and suitability for your job.
Crushed stone remains the backbone of the aggregate industry: USGS reporting confirms crushed stone is the dominant construction aggregate in the United States, used heavily in concrete, road base, and general construction work.
Installation and compaction best practices
Good material installed poorly still fails, so compaction technique matters as much as the grade you order.
- Spread material in lifts of 4 to 6 inches and compact each lift before adding the next, rather than dumping the full depth at once.
- Use a plate compactor for small driveways and walkways, and a vibratory roller for larger areas or deeper base sections.
- Keep the material slightly damp during compaction, since bone-dry aggregate resists locking together.
Structural loads, like driveways and parking areas, need crushed material compacted to a dense, stable base. Trying to compact pea gravel for a driveway is a waste of effort: its rounded shape simply will not lock into a firm surface no matter how many passes you make.
Pro Tip: For a French drain, ask the yard for "clean, washed, single-size 3/4 inch" and request it be stockpiled separately so fines from other loads do not contaminate it during delivery.
How to choose: checklist and supplier questions to ask
Before you call a supplier, pin down five things: intended use, expected load or traffic, drainage needs, desired finish, and budget plus delivery access. That short list determines almost every material decision that follows.
- Is this washed, and what percentage is crushed content versus natural stone?
- What grade is this exactly, for example #57, #8, or crusher run?
- What are your delivery minimums, and is pricing per ton or per cubic yard?
- Can I see or request a small sample before the full load arrives?
| Project type | Recommended material | Key supplier question |
|---|---|---|
| Driveway base | Crushed stone / crusher run | "What percent crushed content?" |
| French drain | Washed gravel or washed stone | "Is this washed and single-size?" |
| Concrete mix | Crushed stone (#8) | "Is this certified for concrete use?" |
| Decorative bed | Pea gravel or river rock | "What finish and color options exist?" |
Watch for loads that arrive visibly muddy or mixed with fines when you ordered washed material, since that is a clear red flag worth rejecting on delivery.
Contractor perspective: practical defaults and on-the-ground lessons
A practical default is simple: crushed stone under anything a vehicle drives on, washed gravel wherever water needs to move, and pea gravel only for low-traffic decorative areas. That pattern is common across gravel driveway repair and site prep work. Bring the checklist and supplier phrasing above to your next quote, and you will spend less time correcting a wrong delivery.
— Yoshua
Tri-State Brush Control & Gravel: how we can help with supply and installation
If you would rather skip the sourcing and installation details, our gravel driveway repair and installation service handles the full job, from sub-base to wearing course, using the grades covered above.
We also handle the site prep that often comes before a driveway project, including brush removal and lot clearing through our full range of services. Our one-pass forestry mulching method clears overgrown ground without burning or hauling waste, and we offer instant pricing plus flexible financing for larger jobs.
- Tell us your spec when requesting a quote: washed or unwashed, grade number, and estimated cubic yards needed.
- Ask about combining driveway repair with any clearing work your lot needs first.
FAQ
Which is cheaper, gravel or crushed stone?
Prices for both materials overlap heavily and depend more on quarry distance and delivery minimums than on the material itself. Ask your local supplier for a per-ton and per-cubic-yard quote on both before assuming one is cheaper.
Is 3/4 inch crushed the same as gravel?
No. A 3/4 inch crushed stone is angular, mechanically crushed rock, while gravel of the same size is naturally rounded. They behave differently under load and in drainage, so the two are not interchangeable despite the similar size.
Does crushed stone need to be compacted?
Yes, for any structural or load-bearing use such as a driveway base, crushed stone should be compacted in lifts of 4 to 6 inches using a plate compactor or vibratory roller. Uncompacted crushed stone will shift and rut under repeated traffic.
What does crushed stone look like?
Crushed stone has sharp, angular edges and flat fractured faces, since it comes from mechanically broken rock like limestone or granite. It looks noticeably different from gravel, which is smooth and rounded from natural water and weather action.
Sources
For readers who want the original standards and data behind these recommendations:
- Application Description - Granular Base - FHWA-RD-97-148
- Mineral Commodity Summary: Crushed stone — USGS (MCS 2026)