The Innis Arden Detour That's Been Two Decades in the Making

If you've driven NW Innis Arden Way since June, you already know the cones are still there. What you might not know is that this closure is the last step in a fix the city has been chasing since 2002, and the road is only part of what's changing.

The short version: the stretch of NW Innis Arden Way between the entrance to Shoreview Park and NW 166th Street has been fully closed since June 8, and the city expects it back open by October 30, the day before Halloween. That's not a random maintenance window. It's the final phase of a project to replace the culverts carrying Boeing Creek under the road, a job the city has been building toward since it gave up trying to dredge its way out of the same problem more than twenty years ago.

The Stretch That's Actually Closed

It's easy to hear "Innis Arden Way is closed" and assume the whole road is off-limits. It isn't. The closure runs specifically between the Shoreview Park entrance and NW 166th Street, the segment where the road crosses Boeing Creek.

If you ride Metro's Route 5, which normally runs this exact stretch between Shoreline Community College and Greenwood Avenue North, it's worth checking Metro's service advisories before you count on your usual stop being active.

Two Decades to Get Here

Here's the part that changes how the closure reads. This isn't a new problem the city is scrambling to patch. It's the closing chapter of a fix that's been in motion since 2002.

Hidden Lake, the small body of water tucked into the west side of Shoreview Park, started as a private fishing pond. It was built in 1920 when Boeing Creek was dammed to create a hatchery, back when the surrounding watershed was still mostly undeveloped. As Aurora Avenue N filled in with development over the following decades, storm runoff into the creek increased, and the lake became the collection point for all the sediment that runoff carried down the ravine.

By the early 2000s, that sediment was piling up faster than anyone expected. Between 2002 and 2013, the city spent more than $600,000 dredging Hidden Lake seven separate times just to keep it functional. In 2014, the city council decided dredging wasn't a real long-term answer and authorized a different plan: remove the dam entirely, restore the creek to something closer to its original path, and replace the culverts under NW Innis Arden Way so fish could move freely again.

Phase one, the dam removal and stream restoration, wrapped up in the fall of 2023. What's happening right now, the culvert swap that has the road closed through October, is phase two, and it's the piece that finally closes out a project the city has been chipping away at for more than two decades. The new 25-foot arch culvert is sized to let sediment, woody debris, and fish move through the way they would in a natural channel, something the old 48-inch pipes were never built to handle. Native cutthroat trout and salmon already use the upstream section of Boeing Creek, and this is the piece of infrastructure that's supposed to let them use the rest of it too.

The Trail That Won't Come Back the Same Way

If you've walked the Hidden Lake Loop Trail through Boeing Creek Park recently, you've probably noticed it's rougher than it used to be. Sections have washed out, and there's a detail worth knowing before you plan a hike around the old lakebed: that particular loop sits outside the boundaries of the dam removal project, and there's no rebuild planned for it as part of this work.

That means the trail's current condition, uneven in places and genuinely rough after the dam and lake came out, is likely closer to its long-term state than a temporary construction inconvenience. If you're taking guests through Boeing Creek Park this fall, the wider network through Shoreview Park, including the loop past the ballfields and the off-leash dog area, is the more reliable route. The forest itself hasn't changed. Boeing Creek Park still holds some genuinely old growth, including Douglas firs tall enough to have escaped the original logging of the area, and that part of the walk is unaffected by any of this.

One thing worth knowing if you're new to the neighborhood: "Innis Arden" refers to two separate private clubs that share a name and not much else. The Innis Arden Club, at 1430 NW 188th Street, is the residents' HOA clubhouse with the pool, tennis courts, and neighborhood events. Innis Arden Golf Club is a different membership entirely, with its own golf course and dining rooms. If someone mentions dinner at "Innis Arden," it's worth a follow-up question about which one they mean.

The Calendar That Kept Going

None of this construction has slowed down the neighborhood's actual social rhythm, which is worth noting because it says something about how the community treats disruption. The Salmon Barbeque, an Innis Arden tradition running more than 50 years and typically held the third Wednesday in July, went ahead this summer on its usual schedule, closure or no closure. The Family Camp-Out and Pancake Breakfast, a neighbor favorite where families pitch tents on the clubhouse grounds for a weekend of games and campfire stories, landed on the calendar this August as it always does. The clubhouse also hosted an early, ticketed Oktoberfest-style event this summer, pulling in kegs from Elliott Bay Brewing Company and Georgetown Brewing along with live music, weeks ahead of the actual holiday. Meanwhile the neighborhood's tennis program, which runs from June through September on the Innis Arden courts, hasn't missed a beat either.

None of these events sit anywhere near the closed stretch of road. The clubhouse, pool, and tennis courts are all well clear of the construction zone, which is part of why the summer calendar never had to bend around it.

What Changes After Halloween

When the road reopens at the end of October, the actual milestone isn't just a lifted detour sign. It's the end of a fix the city has been working on, in one form or another, since 2002: a hundred-year-old man-made dam and its undersized culverts, replaced with infrastructure built to move water, sediment, and fish the way the creek would on its own. That matters beyond the inconvenience of a summer detour. Undersized culverts under a road are also a flood risk, and the city has been explicit that part of the reason for this work is reducing the odds of exactly that kind of failure at NW Innis Arden Way.

So the closure sign on your daily route isn't really about a few months of rerouting. It's the visible tail end of a project that started before a lot of current residents moved in, aimed at fixing a piece of infrastructure that's been quietly failing since before anyone was dredging it by hand. By the time the leaves are down, that particular problem should finally be solved for good, even if the old lakebed trail never looks quite the way it used to.

If you're weighing what a summer like this means for a property near Boeing Creek or anywhere else in Innis Arden, Adam Cobb & Team knows this neighborhood block by block, construction schedule and all. Reach out anytime to request your complimentary home valuation.