Drain Rock in Alaska
Also known as: washed rock, 3/4 clean
For an Alaska cabin site near muskeg, Drain Rock keeps the drainage section clear when breakup water turns surrounding ground soft.
- Size: 3/4 inch to 1-1/2 inch
- Grading: Washed to remove fines and dust
- Type: Rounded or angular varieties
From $397 for 1 ton, delivery included (larger loads cost significantly less per ton)
Free delivery included
Free delivery anywhere in Alaska
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Weekday delivery, earliest Nov 3
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Everything You Need to Know About Drain Rock
Size and Grading
- Size
- 3/4 inch to 1-1/2 inch
- Grading
- Washed to remove fines and dust
- Type
- Rounded or angular varieties
During Alaska breakup, muskeg around a cabin or remote lot can stay soft and hold runoff near the work. Drain Rock provides a clean aggregate section for directing water through a French drain, a septic drainage area, or retaining-wall backfill. Its washing process leaves out dust and fine material that could occupy the spaces intended for water movement. Those connected spaces let water travel through the rock rather than remain in nearby soil.
Deep frost and seasonal thaw make it important to keep the drainage portion separate from soil backfill. When placing material behind a retaining wall, angular Drain Rock is the practical choice where overlying backfill will bear on it, because its pieces interlock while the water paths remain. Rounded Drain Rock suits an exposed landscape drainage feature when a natural stone appearance fits the site.
Quickly Calculate How Much You Need
Material: Drain Rock
How to Measure
Measure the length and width of your project area in feet
Decide on depth in inches (2" for landscaping, 4" for driveways)
Enter the values above and we'll calculate the tonnage you need
Need help figuring out the right amount? We can help!
Call or text us at our contact form and we'll help you calculate the right quantity for your project.
Not sure how much you need? The River Rock Calculator has depth guides, coverage charts and worked examples for this material.
Common Uses
French Drain Systems
French drain trenches use drain rock as their main fill. Water passes through its open, clean stone structure and can move off from foundations, basement areas, and low ground, reducing the chance of water damage.
Septic & Leach Field Construction
For septic wastewater infiltration systems, drain rock creates the drainage layer used in leach and drain field construction. Its clean, uniform gradation meets health department specifications.
Retaining Wall Backfill
Water needs a path behind a retaining wall so pressure does not build up and damage the wall. Drain rock lets water pass through the backfill and supports sound wall drainage.
Foundation Drainage
At a building perimeter, drain rock moves groundwater away from basement wall areas and footings. This drainage helps reduce moisture intrusion and hydrostatic pressure, which can result in cracks and structural damage.
Why Choose Drain Rock
Open Water Pathways
Washing removes fines and dust from drain rock, leaving open spaces for water to travel through. That void space allows drainage systems to move water from the start.
Long-Term Performance
Unlike rounded aggregate, angular drain rock keeps open spaces when it is under load. This limits settling and compaction that can restrict drainage flow.
Washed and Sized
Washed, graded drain rock is suited to engineered drainage work. It works alongside filter fabric, perforated pipe, and the other parts of a drainage assembly.
Structural Protection
Drain rock carries water clear of foundations, retaining walls, and structures. This can limit moisture damage and hydrostatic pressure that lead to expensive repairs, particularly through deep frost and freeze-thaw cycling.
