Sieve-tested, IQAC certified aggregate base for roadways, parking lots, slabs, and driveways. Delivered from the closest of our 42 sourced quarries in the Las Vegas valley, with test data on request.
Type II base is a crushed, well-graded aggregate with natural fines. Those fines are what make it work. They lock into the coarse stone under a roller, and the result is a dense, load-bearing lift that holds shape under traffic and distributes wheel loads into the subgrade below.
When a Clark County print says Type II or a NDOT spec sheet calls for Section 703 aggregate base, the material has to pass sieve analysis, hit 95 percent Standard Proctor, and stand up to the inspector walking the grade. Ours does. Every load is screened to spec and documented, and the closest quarry to your site is usually within 30 minutes of the Valley.
A base course that does not meet gradation does not get signed off. Type II base from Impact is produced to Clark County Uniform Standard Specifications and NDOT Section 703, with in-house quality control on every load leaving the pit.
If your engineer needs documented test data for a submittal, say so on the quote. We will pair the right quarry with the right paperwork and the load will show up with the specs that match.
Same Type II spec family. The premium grade tightens fines control for engineered jobs that need repeatable density.
The spec most prints call for
Crushed rock with natural fines that lock up under a roller. This is what most prints spec.
Tighter gradation control
Specified when the engineer needs repeatable density from lift to lift. Roughly 10 to 15 percent over standard.
Pro tip: Specify the Proctor and lift thickness on your PO, not just the tonnage. It keeps the loose-to-compacted math honest and the grade crew from coming up short on the last lift.
Typical values for our Type II base. Actual gradation and density vary by quarry source and moisture at placement. Request a load-specific report for submittals.
| Gradation | 0 to 1½ inch minus, well graded with fines |
|---|---|
| Compacted Density | ~145 lbs/cubic foot (about 2.0 tons/cy compacted) |
| Loose Delivered Density | ~1.6 tons/cubic yard (loose) |
| Target Compaction | 95% Standard Proctor (ASTM D698) |
| Typical Lift Thickness | 4 to 6 inches per lift, compacted |
| Moisture at Compaction | Near optimum, typically 5 to 8 percent |
| Spec Compliance | Clark County Uniform Standard Specifications, NDOT Section 703 |
| Quality Control | In-house sieve analysis, IQAC certified, test data on request |
Sub-base and base course under asphalt or concrete pavement. We supply Clark County public works jobs and NDOT highway contracts directly from the closest of our 42 sourced quarries. Test data travels with the load.
A properly graded and compacted Type II sub-base distributes wheel loads and keeps the pavement above from cracking. That is the difference between a parking lot that holds up 20 years and one that fails in 5. We size loads to your phasing so the grade crew is never waiting.
Under slab-on-grade and spread footings, Type II base gives you a predictable bearing surface and a capillary break. Spread in 4 to 6 inch lifts, compact to 95 percent, and the concrete sits on something you can sign off on.
Residential and light-commercial driveways, utility trench backfill, equipment pads, and general site base. The same spec, scaled to the load size you actually need.
Type II base is specified for a reason. When the spec sheet calls for something else, use something else.
| If the Job Is… | Pick | Why |
|---|---|---|
| Print calls for Type II or Class II base | Type II Base | Meets the sieve analysis and Proctor requirements. |
| Engineer spec requires CCSD or NDOT compliance | Type II Base | Documented gradation and test data come with the load. |
| Non-structural fill or general grade-to-elevation | Fill & Pit Run | Cheaper, coarser, no fines control required. |
| Drainage layer under slab or in trench | Drain Rock or 3/4" #67 | Open-graded rock moves water; Type II holds it. |
| Paver setting bed or concrete flatwork sand bed | Washed Sand | Type II has fines; sand gives you a working surface. |
Real stockpiles, real closeups. The gradation and fines content you see here is what lands on your jobsite.
Concrete sand under slabs, mason sand for mortar, bedding sand for pavers. One supplier, same delivery window.
Explore#67, 1.5", and 1x3" washed rock for drainage layers, ready-mix, and foundation perimeter work.
ExploreStandard paver base aggregate and bedding sand for hardscape phases on the same project.
ExploreStructural fill for elevation changes and over-ex backfill before the Type II lift goes down.
ExploreSend us the tonnage, the site address, and the week you pour. We will call you with a quote, delivery windows, the nearest quarry, and whatever the submittal paperwork needs to say.