French Drains & Drainage Systems in Graham, WA

Drainage & French drains in Graham: what to know

A French drain works only when its outlet is settled first. We start with the discharge point, then give the trench a steady fall toward it, so the gravel carries water along its length. A curtain drain set across the slope above the wet area intercepts seepage before the water spreads over the lawn.

Tightlines run roof water through solid pipe to their own outlet, which keeps the flow out of the perforated line. The discharge must stay off the county road and off neighboring parcels. We set that point on the drawing before the trench is cut, and we adjust it if the ground will not take the flow. Any wet spot found at the trench floor is logged on the drawing with its depth and location.

Permits and rules in Graham

Any line that crosses into the county right-of-way, or joins a county drainage facility, gets its own review. Planning and Public Works is asked which office takes that route and whether a right-of-way permit applies. The governing review is named before digging. The county’s stormwater manual governs the stormwater review, and we confirm its threshold for the lot before the quote is issued.

Rules change and vary by parcel, so we confirm the current requirements with the city before we start.

How we approach it

Fix the outlet location before setting any trench grade
Place curtain drains across the slope above wet ground
Run roof water through solid pipe to a separate outlet
Verify any right-of-way review before the trench opens

For the full process, see our Drainage Systems & French Drains page.

Questions from Graham homeowners

Where can the outlet of a Graham French drain go?

Onto ground that can absorb the water, or into a storm connection the county approves, with the road and neighboring parcels kept free of the discharge.

Does a Graham yard drain need a county permit?

The answer turns on trench depth, where the outlet sits, and whether the work touches the county right-of-way. We confirm that answer with Pierce County before digging starts.

Will a drain solve a wet spot on a Graham lot?

It can, when the water arrives from a slope or from roof runoff. Before we recommend a drain, we survey the grade and the drainage path, and the proposal goes forward only when it intercepts that water.