French Drain Installation in Lake Oswego, Oregon
Intercept subsurface water and route it to an approved outlet with a system planned for the actual grade.
Residential + commercial projects • (971) 242-9163
A French drain needs a destination
A French drain is a gravel-filled trench with perforated pipe that collects subsurface water. The pipe and rock matter, but the route and outlet matter more. Moving water ten feet without a safe destination simply creates a new wet spot.
We start by identifying where water appears, what feeds it and where it can go. Sometimes a French drain fits. Sometimes surface grading, a catch basin or solid drain pipe is the better tool. The goal is not to install a product—it is to solve the water path.
LOOK AT THE WATER PATH
French-drain work built around the source
A useful system matches the water, soil, slope and outlet.
Interceptor drains
Collect subsurface water moving across a slope before it reaches a yard, wall or structure.
Foundation and wall drainage
Prepare drainage routes where the approved building or retaining-wall plan calls for them.
Outlet connections
Transition collected water into an approved solid-pipe route, daylight point or stormwater feature.
Discharge cannot simply be pushed onto a neighboring property, street or sensitive area. The outlet should be lawful, stable and maintainable.
Lake Oswego water rules belong in the design
The City regulates stormwater and requires erosion control for certain disturbed areas, including work close to water. Drainage changes may also need review when they connect to public systems or affect protected resources.
That means the route should be checked before trenching. We coordinate the excavation around the approved plan and avoid promising that one drain type solves every wet-property problem.
CALL (971) 242-9163Trace the water before opening the trench
A good drain starts with observation. Where does water appear, how long does it stay and what changes during a hard rain?
01 — Diagnose the source
Separate surface runoff, roof water and groundwater as much as the site allows.
02 — Choose route and outlet
Set the trench path, slope and approved discharge point.
03 — Excavate and install
Place fabric, clean rock and perforated pipe according to the plan.
04 — Protect and finish
Connect the outlet, restore grade and leave access for maintenance where needed.
Lake Oswego French-drain FAQs
Will a French drain fix standing water?
It can help when subsurface water is the source and there is a workable outlet. Surface ponding may need grading or catch basins instead.
How deep should a French drain be?
Depth depends on the water source, grade, outlet and nearby structures. A standard number without a site assessment is only a guess.
Can a French drain discharge to the street?
Do not assume so. Discharge rules and connections vary. The route should be confirmed with the appropriate City or design authority before installation.
Tired of chasing the same wet spot?
Show us where water appears, where the property slopes and any existing outlets. We’ll help determine whether a French drain fits—or whether another drainage approach makes more sense.