AggregateProducts
Clearlake Lava is a supplier of lava and hard rock aggregates sourced from three Lake County quarries we have owned and operated for more than 50 years. We offer aggregate products in various sizes for a variety of applications
LANDSCAPE ROCK
Our all natural landscaping aggregates feature a palette of rich, beautiful colors, available in a variety of sizes. Our landscape rock will not rot, decompose, or fade as with wood mulches and other alternative materials. Our landscape rock has a variety of other practical advantages. It’s lighter than comparable materials, making it easier and cheaper to transport.
Drain ROCK
Our permeable drain rock is used extensively in a variety of drain applications, including vineyard drainage ditches, septic systems, French drains, under slab, and wall-backing applications. The porosity of the rock, as well as its lightweight and durability, make it very easy to handle and place.
testing & specifications data
We have taken core samples of the material from which we produce this drain rock. Core samples were taken per ASTM C42, with the lowest breaks (average of three cores) at 5,953 PSI. The highest breaks were 8,183 PSI. Normally, once a rock is crushed, the resulting material will be stronger than it was before crushing. The reason is that the weaker structures are fractured leaving only the stronger fractures in place. This fact makes the compressive strengths of the pre-crushed rock shown above even more impressive.
We also have completed a durability test on the drain rock, and the test shows a durability index of 90, Caltrans test method 229. This test provides a measure of the relative resistance of an aggregate to producing clay-sized fine particles in the presence of water. Caltrans specification for Class 1 or 2 permeable materials (drain rock) as specified in Section 68-1.025 shall not be less than 40. This specification, in general, also follows AASHTO specifications. The material is very clean, and all the fines are non plastic and washing is not normally required in most septic applications.
We have also tested for resistance, sulfates and chlorides. The resistance tested good to very good. Sulfates were so low that there should not be any direct adverse impacts on concrete, motor, grout, or cement. Chlorides are also so low that there should be no significant corrosion impact on concrete steel reinforcement.
SPEC AGGREGATE
We produce many graded blends of base rock aggregate for construction applications—including for the stabilization of buildings, parking lots, walkways, and roadways—and provides a highly stable working surface when compacted tightly.
We have many decades of experience working with partners in construction and industrial sectors, and can produce base rock blends which meet exacting internal or regulatory specifications.
SAND
We supply sand products in varying colors and grades, which are produced by crushing aggregates mined from our three company-owned quarries. Our sand products are suitable for applications and projects ranging in scale from backyard fill to commercial construction.
Common applications for Clearlake Lava’s sand aggregate include:
- PG&E Trenching & Bedding
- Septic Mounds & Wastewater Treatment
- Permeable Drain Systems
- Concrete, Asphalt & Masonry Production
- Underneath Pavers
- Sports Fields & Equestrian Arenas
Riprap & Gabions
While we crush much of the rock we mine for our aggregate products, we are also a wholesale supplier of uncrushed rock. These are primarily used by our clients as riprap for pilings, abutments, and erosion control.
This product is also ideal for use in gabion walls for civil engineering, landscaping, and other applications.
Clearlake Lava aggregate products
exhibit superior performance & are environmentally friendly
The quarries from which we source our aggregates are the product of millions of years of volcanic action. This geological activity burned away the dirt, clay, organics and other impurities common to many rock quarries, producing material that is naturally ‘clean.’ As a result, our processed aggregates have a plasticity index (PI) of 0.
Typically, aggregates must be washed to purge clay and dirt contaminants. Because of the natural purity and low plasticity index, the...
Lack of need for rinsing represents a water savings of approximately 4,500 to 4,800 gallons per 1,000 cubic yards of material.
In addition, we do not have to expand our products using fossil fuels to produce superior performance characteristics. This represents a significant savings in terms of energy, time, money, and natural resources, and a...
Significantly reduced environmental footprint, without sacrificing quality or performance.
We offer a variety of aggregate product lines,
sourced from each of our lake county quarries.
For more than half a century, we have been operating 3 aggregate quarries in Lake County, California. The aggregate sourced from each of these quarries features different qualities and characteristics, allowing us to more easily meet the discerning needs of our clients:
- Clearlake Lava, Inc: Red and Brown lava rock
- Point Lakeview Rock & Redi-Mix: Black lava rock
- Hidden Valley Sand & Gravel: Creek rock and hard rock