French Drains & Drainage Systems in Enumclaw, WA

Drainage & French drains in Enumclaw: what to know

The chapter’s low impact development section, 14.10.025, defines LID as a stormwater strategy that strives to mimic predisturbance hydrology. Where a yard drain can spread water into the ground on your own lot, we check whether that section asks for the approach before we choose between a dispersal area and a piped outlet. Either choice is confirmed with the city before the trench is dug.

Section 14.10.095 makes it unlawful to discharge contaminants into surface water, stormwater, or ground water. Concrete wash, fuel, and paint stay out of the drain’s inlets and outlets, and we keep washout from the concrete work out of the drain line and the trench.

Permits and rules in Enumclaw

A yard drain raises questions about its trench, its outlet, and any connection to the city’s system. Work near a slope or a wall can change those answers, so we measure the grade and the wall heights before we dig. We confirm the trench, the outlet, and any connection with the city, and we tell you which track applies before the schedule is set.

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

How we approach it

Locate where the water enters the yard and where it can leave
Route roof downspouts through solid pipe, apart from the perforated drain line
Keep concrete wash, fuel, and paint out of the drain
Confirm the outlet and any storm connection with the city before the trench opens

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

Questions from Enumclaw homeowners

Who maintains a French drain on my Enumclaw lot?

The city’s stormwater chapter makes the property owner responsible for the maintenance, operation, and repair of private stormwater facilities. We confirm with the city whether your drain counts as one before we set the outlet.

Where should an Enumclaw yard drain outlet go?

On your own lot, spread across ground able to absorb it, or into a storm connection that we confirm first. We set the outlet before the trench is dug, so the water does not end up on a neighbor’s ground or a slope.

Does Enumclaw’s low impact development section change how a yard drain is built?

It can. We check the LID section, 14.10.025, against your lot, so the choice between spreading water on the ground and carrying it to a piped outlet follows the code and the site together.