Heading north after leaving the Mountlake Terrace Transit Center, the light rail track will cross to the west side of I-5. Trees on both sides of the highway here will be heavily impacted by the buildout. (Lizz Giordano / The Herald)

Heading north after leaving the Mountlake Terrace Transit Center, the light rail track will cross to the west side of I-5. Trees on both sides of the highway here will be heavily impacted by the buildout. (Lizz Giordano / The Herald)

To make room for light rail, 5,300 trees will fall along I-5

Sound Transit expects to start clearing in late April and eventually replant more than 20,000 trees.

LYNNWOOD — The drive along I-5 from Northgate to Lynnwood is about to get a little less green — at least a few years.

To clear space for the 8.5-mile Lynnwood Link extension, Sound Transit expects to cut down approximately 5,300 trees along the future light rail path that hugs the interstate. The transit agency plans to replace those lost by replanting more than 20,000.

“The visual impact is going to be a change, absolutely,” said Karl Almgren, manager for Lynnwood’s City Center Program. “But it is for very important regional mass transit that was approved by voters.”

Approximately 75 percent of the tree removal will happen on land owned by the Washington State Department of Transportation, according to Sound Transit. Work to clear vegetation is set to begin in late April and will last about six months. Most of the replanting will occur once the light rail project is complete.

The replacement trees will be about 3 feet tall, according to Sound Transit. More than half, 53 percent, will be deciduous.

In Mountlake Terrace, about 2,300 trees will be taken out, and then replaced by 7,500.

“It’s an iconic tree corridor along I-5 traveling through Mountlake Terrace,” City Manager Scott Hugill said.

Down the road in Lynnwood, about 1,200 trees will be replanted after 1,000 or so are removed. In Seattle, a little more than 6,000 trees will replace the 580 taken out, and in Shoreline, about 5,900 are to replace about 1,400 cleared. Removal will begin in Seattle along 5th Avenue between NE 130th and 145th streets.

Construction on the Lynnwood Link extension will begin this spring. (Lizz Giordano / The Herald)

Construction on the Lynnwood Link extension will begin this spring. (Lizz Giordano / The Herald)

Replacement numbers depend on the size of the existing trees and regulations in each city, according to Rod Kempkes, executive project director for Lynnwood Link.

One heavily impacted spot will be north of the Mountlake Terrace Transit Center, where the light rail path will cross I-5 from the east side to the west side, Kempkes said.

Plans there call for clearing most of the trees between the houses and interstate. A noise wall will be eventually installed in most of that area, according to plans.

“Research shows that evergreen tree belts can provide some limited reduction of traffic noise,” said Andrew Brown, an assistant professor in the Department of Speech and Hearing Sciences at the University of Washington, in an email. “The amount of noise reduction depends on the dimensions — length, depth, height — planting density, species, and even age of the trees. Dense and deep belts of trees with thick limb coverage to the ground may provide several decibels of noise reduction — amounting to a clear decrease in perceived loudness.”

WSDOT is partnering with Sound Transit to monitor and care for the young trees for 13 years, a decade longer than the standard time, according to Sound Transit.

“We knew trees were going to be a big deal,” Kempkes said. “So we did a massive survey of every tree that was over 4 inches in diameter.”

The wood from the cut trees becomes property of the contractor and can be sold for timber, mulch or other wood-by products. Sound Transit said this will reduce the cost of the project.

Closer to the light rail track, shorter trees that will grow no more than 25 feet high, will be planted. Farther away, larger trees will be used.

Some noise walls along I-5 are being moved to make room for light rail. During construction temporary sound barriers will be installed.

The extension, which will bring light rail to Snohomish County, is set to open in July 2024. Early work set to start this spring also includes building demolitions and utility relocation. Major construction is scheduled to start in summer and to be mostly complete in 2022. After that, the agency plans extensive testing.

Sound Transit is hosting open houses for the extension. The first is scheduled from 6 to 8 p.m. Thursday at the Nile Shrine Golf Center, 6601 244th St. SW, Mountlake Terrace. The second is set for a week later, from 6 to 8 p.m. April 25 at the Lynnwood Convention Center, 3711 196th St. SW.

Lizz Giordano: 425-374-4165; egiordano@heraldnet.com; Twitter: @lizzgior.

Talk to us

More in Local News

Cars drive through the intersection of Highway 9 and South Lake Stevens Road on Thursday, Feb. 17, 2022 in Lake Stevens, Washington. (Olivia Vanni / The Herald)
Highway 9 to close this weekend in south Lake Stevens

Detours take drivers around the closure between 20th Street SE and 32nd Street SE from Friday night to Monday morning.

Empty shelves in the baby formula section at a grocery store in Lynnwood, Washington. (Jacqueline Allison / The Herald)
Amid baby formula shortage, local moms scrambling to feed babies

Shelves are bare and prices are up. But there are resources for Snohomish County mothers in need.

Everett
$1 million bail for Everett ampm shooting suspect

The suspect, 36, is accused of shooting an acquaintance Monday, dumping the gun in a dumpster and fleeing from police.

Logo for news use featuring Snohomish County, Washington. 220118
Snohomish County seeks input on spending American Rescue Plan dollars

In-person events across the county will help guide more than $80 million in federal recovery money.

Mandy Jeffcott and Aaron King explore the area beneath a highway underpass while conducting a PIT count Tuesday, Feb. 22, 2022, in Everett, Washington. (Ryan Berry / The Herald)
Snohomish County homelessness rose to 10-year high, count shows

Data released Monday confirmed what advocates suspected: The local homeless population grew amid the pandemic.

Sam Bowles records the run off the water from a chalk drawing with friend and co-artist, Rhyanna Mercer, Tuesday afternoon in Everett, Washington on May 10, 2022.  (Kevin Clark / The Herald)
Jackson High’s global TikTok star is chalk full of ideas

Sam Bowles, 18, uses vibrant videos and social media fame to raise awareness of autism.

Dan Bates / The Herald
When Seattle Genetics founder, Clay Siegall lost his father while in college, he switched from studying for an MD to studying for a PhD., and a goal to treat cancer patients.  His efforts are paying off in lives.
Bothell biotech CEO resigns after domestic-violence allegation

Clay Siegall co-founded Seagen, which develops therapies for cancer patients. He’s accused of attacking his wife.

Everett
Nonprofit offers free mental wellness event for local teens

The Saturday gathering at EvCC, sponsored by Leadership Launch, is for teens in eighth grade through college.

Logo for news use featuring Snohomish County, Washington. 220118
3.6-magnitude earthquake jars awake Darrington residents

The quake and aftershocks did not cause any serious damage. They’re reminders of dozens of faults that lie below.

Most Read