Drainage & Catch Basin
Installation & Repair

Why Drainage Matters for Your Pavement

Water is the single biggest threat to asphalt and concrete pavement in the Pacific Northwest. Western Washington's wet climate means pavement that isn't properly drained will fail years ahead of schedule — cracking, heaving, developing potholes, and losing its structural integrity from the bottom up.

We handle drainage as part of every paving project we do. When drainage issues exist, we address them before laying asphalt or concrete — because putting new pavement over a drainage problem just delays the inevitable. We also handle drainage as a standalone service for existing lots, driveways, and properties.

Catch Basin Installation & Repair

Catch basins are the workhorses of commercial parking lot drainage. They collect surface runoff through a grated inlet, filter out sediment and debris, and channel water into the storm sewer system. A functioning catch basin network is what separates a parking lot that lasts 25 years from one that needs major repairs in 10.

Catch Basin Services

• New catch basin installation — concrete or HDPE
• Catch basin frame and grate replacement
• Basin wall repair and rebuilding
• Raising or lowering basin elevation to match new pavement
• Catch basin cleaning and sediment removal
• Storm line connections and lateral repairs
• Inlet protection and debris filtering

Trench Drains

Trench drains (also called channel drains or linear drains) are installed across the surface of a paved area to intercept sheet flow before it can pond or damage structures. They're common at the base of sloped driveways, in front of garage and warehouse doors, across loading dock aprons, and along building foundations.

We install cast-in-place concrete trench drains as well as pre-cast polymer concrete and HDPE channel systems. Grate options include ductile iron, galvanized steel, and ADA-compliant pedestrian-safe grates for areas with foot traffic.

Common Trench Drain Applications

• Driveway aprons and garage entrances
• Loading dock approaches and warehouse entries
• Slopes where sheet water must be intercepted
• Car washes and vehicle service areas
• Pedestrian plazas and entryways
• Along building foundations and retaining walls

French Drains & Area Drains

Not all drainage problems are on hard surfaces. Chronically wet yards, saturated driveways, soggy landscaping, and water infiltrating foundations are common in Western Washington's clay-heavy soils. French drains and area drains are the standard residential solution.

Residential Drainage Services

• French drain installation — perforated pipe in gravel trench
• Area drain installation in yards and low spots
• Driveway edge drains to protect pavement subbase
• Downspout tie-ins and foundation drainage
• Grading corrections to direct flow away from structures
• Dry creek beds and bioswale roughing

Parking Lot Drainage & Grading

Commercial parking lots rely on precise grading to move water to catch basins efficiently. Over time, settled pavement, patch repairs, and overlay projects can disrupt the original drainage geometry — creating bird baths (ponding areas) that accelerate pavement failure and create slip hazards.

We evaluate lot drainage during every assessment. When we identify grading issues, we can address them through milling and re-paving problem areas, installing additional catch basins, or adjusting grades during a full lot overlay. Getting the drainage right is always part of the job.

Drainage Paired With Paving

The most cost-effective time to address drainage is during a paving project. Installing or repositioning catch basins, adding trench drains, or regrading problem areas while the lot is already torn up adds relatively little to the project cost compared to cutting into finished pavement later. We proactively identify and quote drainage work as part of every paving estimate we provide.

Service Areas

We provide drainage and catch basin services throughout Western Washington including Woodinville, Kirkland, Redmond, Bellevue, Bothell, Kenmore, Sammamish, Issaquah, Renton, Everett, Lynnwood, Shoreline, Seattle, and surrounding areas. Contact us to confirm coverage for your location.