Minus Crushed Rock
Minus Crushed Rock
Product Description
¼” Minus is a crushed rock product with a large amount of fines, which allow it to pack down tightly and stay in place when compressed. It is made up of rock pieces up to ¼” in diameter.
¼” Minus is manufactured at Kapowsin Quarry from quarried basalt rock. It is fractured and angular and has a blue-gray color.
Product Applications
¼” Minus is typically used to create well-packed paths. It can also be used underneath pavers to create a solid base. It can be used in similar ways to decomposed granite.
Similar Products
Compared to ¼” Minus, 3/8″ Minus (8990-3) is a slightly larger, coarser material made with crushed streambed cobbles.
Helpful Tips
If you’re stumped about whether to use clean or minus material, check out our “Clean v. Minus” guide.
You can also refer to our popular article and video, “Choosing the Right Rock: Comparing Crushed Rock Sizes and Types.”
About Minus Rock
Minus rock is commonly used to create paths, trails, driveways, and other driveable surfaces.
“Minus” is the opposite of “clean” or “washed” rock. “Minus” is a term that refers to gravel that includes a large amount of smaller crushed rock pieces. Some of this material looks like dirt or dust. The combination of smaller and large rock pieces allows the gravel to pack tightly together. With enough compaction, minus gravel can be used to create relatively flat, smooth surfaces.
Pricing & Availability
Minimum $35.00 purchase required on all materials. Check pricing and availability by requesting a quote online.
Material Spreading
Prices quoted are for material delivery only. Drivers do their best to dump material evenly when requested. However, Washington Rock cannot guarantee that this will result in an even or desirable distribution of material. Customers must supply the equipment and labor necessary to finish projects.
Minimum Delivery Quantity
Our minimum order quantity for deliveries is 10 cubic yards. Do you need less than that? Find a local supplier here.
Product Description
3/8″ Minus is a crushed rock product with a large amount of fines. It packs tightly underfoot. It is made up of rock pieces up to 3/8″ in diameter.
3/8″ Minus is manufactured at King Creek Pit from crushed streambed rock.
Product Applications
3/8″ Minus can be used for decorative pathways and garden borders as well as in between pavers. Compared to ¼” minus, 3/8″ Minus is a cleaner and coarser mix. It’s more brown in tone compared to Kapowsin Quarry products.
Similar Products
¼” Minus (9990-1) is a denser product with a smaller maximum gravel size and a larger proportion of fines.
Helpful Tips
If you’re stumped about whether to use clean or minus material, check out our “Clean v. Minus” guide.
You can also refer to our popular article and video, “Choosing the Right Rock: Comparing Crushed Rock Sizes and Types.”
About Minus Rock
Minus rock is commonly used to create paths, trails, driveways, and other driveable surfaces.
“Minus” is the opposite of “clean” or “washed” rock. “Minus” is a term that refers to gravel that includes a large amount of smaller crushed rock pieces. Some of this material looks like dirt or dust. The combination of smaller and large rock pieces allows the gravel to pack tightly together. With enough compaction, minus gravel can be used to create relatively flat, smooth surfaces.
Pricing & Availability
Minimum $35.00 purchase required on all materials. Check pricing and availability by requesting a quote online.
Material Spreading
Prices quoted are for material delivery only. Drivers do their best to dump material evenly when requested. However, Washington Rock cannot guarantee that this will result in an even or desirable distribution of material. Customers must supply the equipment and labor necessary to finish projects.
Minimum Delivery Quantity
Our minimum order quantity for deliveries is 10 cubic yards. Do you need less than that? Find a local supplier here.
Product Description
Crushed Surfacing Top Course (CSTC) is a crushed rock product that contains minus (also known as fines). This state-spec gravel is made up of rock pieces up to 5/8″ in diameter. The fines allow the product to pack down tightly and stay in place when compressed.
CSTC is manufactured at Kapowsin Quarry from quarried basalt rock. It is fractured and angular.
CSTC meets or exceeds WSDOT Standard Specifications 9-03.9(3) for grading:
- 99–100% passing the ¾” screen
- 80–100% passing the ½” screen
- 46–66% passing the #4 screen
- 8–24% passing the #40 screen
- up to 10% passing the #200 screen
Our CSTC also meets or exceeds all quality test requirements for fracturing, sand equivalency, abrasion, and degradation.
Product Applications
Like the name suggests, top course is typically used as a top layer on gravel driveways and parking lots. It’s often placed on top of Crushed Surfacing Base Course (CSBC).
CSTC can be used on its own to build driveways used by light cars or equipment. More often, it’s used in combination with CSBC to create sturdier roads.
Similar Products
CSBC (1¼” Minus) is often used as a base material on top of which CSTC is spread. CSBC can also be used on its own on roads used by heavy equipment.
Variations of CSTC include ¾” Shoulder Rock and Maintenance Rock.
Helpful Tips
If you’re stumped about whether to use clean or minus material, check out our “Clean v. Minus” guide.
You can also refer to our popular article and video, “Choosing the Right Rock: Comparing Crushed Rock Sizes and Types.”
About Minus Rock
Minus rock is commonly used to create paths, trails, driveways, and other driveable surfaces.
“Minus” is the opposite of “clean” or “washed” rock. “Minus” is a term that refers to gravel that includes a large amount of smaller crushed rock pieces. Some of this material looks like dirt or dust. The combination of smaller and large rock pieces allows the gravel to pack tightly together. With enough compaction, minus gravel can be used to create relatively flat, smooth surfaces.
Pricing & Availability
Minimum $35.00 purchase required on all materials. Check pricing and availability by requesting a quote online.
Material Spreading
Prices quoted are for material delivery only. Drivers do their best to dump material evenly when requested. However, Washington Rock cannot guarantee that this will result in an even or desirable distribution of material. Customers must supply the equipment and labor necessary to finish projects.
Minimum Delivery Quantity
Our minimum order quantity for deliveries is 10 cubic yards. Do you need less than that? Find a local supplier here.
Product Description
Crushed Surfacing Base Course (CSBC) is a crushed rock product containing minus (also known as fines). It’s a state-spec gravel made up of rock pieces up to 1¼” in diameter. The fines help the product pack down tightly and stay in place when compressed. CSBC performs well in wet conditions and provides stability in muddy conditions.
CSBC is manufactured at both Kapowsin Quarry (5990-1) and King Creek Pit (5990-3). The Kapowsin Quarry version is made from quarried basalt rock while the King Creek Pit version is made by crushing streambed rock. Both products are fractured and angular.
CSBC meets WSDOT Standard Specifications 9-03.9(3) for grading:
- 99–100% passing the 1¼” screen
- 80–100% passing the 1″ screen
- 50–80% passing the 5/8″ screen
- 25–45% passing the #4 screen
- 3–18% passing the #40 screen
- up to 7.5% passing the #200 screen
Our CSBC also meets or exceeds all quality test requirements for fracturing, sand equivalency, abrasion, and degradation.
Product Applications
Like the name suggests, base course is typically used as a base layer for gravel driveways and parking lots or as a subbase for paved surfaces. It’s often topped with Crushed Surfacing Top Course (CSTC).
CSBC is an ideal gravel for roadways that are busy or are used by heavier equipment. CSBC can also be used as a structural base for retaining walls.
Similar Products
1¼” Minus Road Base (Grade 1 Tailings) (5961-1) is a more affordable, non-spec alternative to CSBC.
CSTC (5/8″ Minus) is a good choice for driveways or paths used by cars and light equipment.
We can also manufacture 1¼” Minus Shoulder Rock.
Helpful Tips
If you’re stumped about whether to use clean or minus material, check out our “Clean v. Minus” guide.
You can also refer to our popular article and video, “Choosing the Right Rock: Comparing Crushed Rock Sizes and Types.”
About Minus Rock
Minus rock is commonly used to create paths, trails, driveways, and other driveable surfaces.
“Minus” is the opposite of “clean” or “washed” rock. “Minus” is a term that refers to gravel that includes a large amount of smaller crushed rock pieces. Some of this material looks like dirt or dust. The combination of smaller and large rock pieces allows the gravel to pack tightly together. With enough compaction, minus gravel can be used to create relatively flat, smooth surfaces.
Pricing & Availability
Minimum $35.00 purchase required on all materials. Check pricing and availability by requesting a quote online.
Material Spreading
Prices quoted are for material delivery only. Drivers do their best to dump material evenly when requested. However, Washington Rock cannot guarantee that this will result in an even or desirable distribution of material. Customers must supply the equipment and labor necessary to finish projects.
Minimum Delivery Quantity
Our minimum order quantity for deliveries is 10 cubic yards. Do you need less than that? Find a local supplier here.
Product Description
2″ Minus is a crushed rock product containing minus (also known as fines). It’s a gravel product made up of rock pieces up to 2″ in diameter. The fines help the product to pack down tightly and stay in place when compressed. It performs well in wet conditions and provides stability in muddy conditions.
2″ Minus is manufactured at Kapowsin Quarry from quarried basalt rock. It is fractured and angular.
Product Applications
2″ Minus can be used as a base layer for gravel driveways and parking lots or as a subbase for paved surfaces. It can also be used in concrete slab foundations.
Similar Products
1¼” Minus (CSBC) (5990-1 or 5990-3) is a state-spec road base material commonly used in conjunction with 5/8″ Minus (CSTC) (7990-1).
We also offer 4″ Minus (1994-1) and 6″ Minus (1996-1).
Helpful Tips
If you’re stumped about whether to use clean or minus material, check out our “Clean v. Minus” guide.
You can also refer to our popular article and video, “Choosing the Right Rock: Comparing Crushed Rock Sizes and Types.”
About Minus Rock
Minus rock is commonly used to create paths, trails, driveways, and other driveable surfaces.
“Minus” is the opposite of “clean” or “washed” rock. “Minus” is a term that refers to gravel that includes a large amount of smaller crushed rock pieces. Some of this material looks like dirt or dust. The combination of smaller and large rock pieces allows the gravel to pack tightly together. With enough compaction, minus gravel can be used to create relatively flat, smooth surfaces.
Pricing & Availability
Minimum $35.00 purchase required on all materials. Check pricing and availability by requesting a quote online.
Material Spreading
Prices quoted are for material delivery only. Drivers do their best to dump material evenly when requested. However, Washington Rock cannot guarantee that this will result in an even or desirable distribution of material. Customers must supply the equipment and labor necessary to finish projects.
Minimum Delivery Quantity
Our minimum order quantity for deliveries is 10 cubic yards. Do you need less than that? Find a local supplier here.