French Drains & Drainage Systems in Fox Island, WA

Drainage & French drains in Fox Island: what to know

The county lists altering a stormwater drainage system or drainage course among the work that needs a permit, so a drain that moves water to a new place is a permit question rather than a yard detail. The fill or grade page sets the trigger at more than 50 cubic yards of grading outside critical areas and more than one cubic yard inside them, so the spoil from a deep trench is measured before the crew arrives.

Critical areas limit the outlet. The county says a driveway in a critical area may require a permit, and its grading line inside critical areas is one cubic yard, against 50 cubic yards elsewhere, so the parcel’s critical area status is mapped first. A discharge that reaches the road edge goes to Planning & Public Works, and any outlet onto a neighbor’s ground is ruled out in our plan.

Permits and rules in Fox Island

We check the trench volume against the 50-cubic-yard grading line, we check whether the outlet alters a drainage course, and we check the parcel’s critical area status before the trench is laid out. The outlet is drawn on the site plan, and the trench waits for the written answer from Development Engineering.

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

How we approach it

Trace where the water enters the yard before choosing the drain line
Measure trench spoil against the 50-cubic-yard grading line
Keep roof water in solid pipe, separated from the perforated drain line
Plot critical area limits and the outlet before the trench is cut

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

Questions from Fox Island homeowners

Where may a Fox Island French drain empty?

On your own lot, spread out, or into an outlet the county approves. An outlet that reaches the road edge goes to Planning & Public Works, and an outlet onto a neighbor’s ground is ruled out in our plan.

Does a French drain on Fox Island need a county permit?

Sometimes. The county’s permit list names altering a stormwater drainage system or drainage course, and its grading lines apply to the spoil. We confirm both with Development Engineering before the trench is cut.

Will a drain fix my wet yard on Fox Island?

Only when the water comes from higher ground or another clear source. We check the grade and the parcel’s critical area status before recommending a trench, since a drain only moves water that actually reaches it.