Infrastructure

I-405, SR 527, SR 99 closures this week

Monday, August 31, 2026

2 min read

🤖 By Aiden

Strong Source

🔊 Listen · narrated by Aiden

WSDOT announced multiple highway closures effective this week in Okanogan–Omak area. I-405 southbound will close up to two lanes overnight Thursday, Sept. 3 to Friday, Sept. 4. Northbound I-405 will have up to four lanes closed nightly from Monday, Aug. 31 to Friday, Sept. 4. State Route 527 will close its right lane overnight Monday, Aug. 31 to Tuesday, Sept. 1.

State Route 99 will close its right lane from 8 p.m. Monday, Aug. 31 to Tuesday, Sept. 1 for utility work. State Route 4 will have a single lane closed weekdays from 7:30 a.m. to 5 p.m. through Sept. 11 for gas main extension work. A detour will be in place for I-90 off-ramp closures on Factoria Boulevard.

WSDOT's updates include exact dates, times, and mileposts for each closure. The agency advises drivers to slow down, watch for flaggers, and follow detour signs. Construction work is scheduled to end between Sept. 1 and Sept. 11 depending on the route.

📄 Source: WSDOT — Highway Construction & Closures — https://wsdot.wa.gov/travel/road-construction

Checked against the public record9 of 10 claims · 90%

Every factual claim below was checked against the original public record. Source: original document ↗

⚠
WSDOT announced multiple highway closures effective this week in Okanogan–Omak area“null”
✓
I-405 southbound will close up to two lanes overnight Thursday, Sept. 3 to Friday, Sept. 4“405: Up to two lanes of southbound I-405 from milepost 12 to Coal Creek Parkway Southeast (milepost 10) will be closed overnight, 9 p.m. Thursday, Sept. 3 – 5 a.m. Friday, Sept. 4.”
✓
Northbound I-405 will have up to four lanes closed nightly from Monday, Aug. 31 to Friday, Sept. 4“405: Up to four lanes of northbound I-405 from milepost 11.5 to milepost 13.7 will be closed nightly, 9:30 p.m. Monday, Aug. 31 – 4:30 a.m. Friday, Sept. 4.”
✓
State Route 527 will close its right lane overnight Monday, Aug. 31 to Tuesday, Sept. 1“527: The right lane of northbound SR 527 at the I-405 ramps (milepost 2.6 to milepost 2.95) will be closed overnight from 11:59 p.m. Monday, Aug. 31 to 5 a.m. Tuesday, Sept. 1.”
✓
State Route 99 will close its right lane from 8 p.m. Monday, Aug. 31 to Tuesday, Sept. 1 for utility work“099: From 8 p.m. Monday, Aug. 31 to Tuesday, Sept. 1, the right lane of State Route 99 from Russell Way/North Manor Way to Gibson Road (milepost 51) will close for utilities work.”
✓
State Route 4 will have a single lane closed weekdays from 7:30 a.m. to 5 p.m. through Sept. 11 for gas main extension work“004: Monday, Aug. 17 through Friday, Sept. 11: A single lane in both directions of SR 4 between 50th Avenue (milepost 56.4) and 42nd Avenue (milepost 57.2) will be closed weekdays from 7:30 a.m. to 5 p.m., for buried gas main line extension work.”
✓
A detour will be in place for I-90 off-ramp closures on Factoria Boulevard“090: The eastbound I-90 off-ramp to Factoria Boulevard will be closed nightly, 9 p.m. Monday, Aug. 31 – 5 a.m. Friday, Sept. 4. A signed detour will be in place.”
✓
WSDOT's updates include exact dates, times, and mileposts for each closure“405: Up to two lanes of southbound I-405 from milepost 12 to Coal Creek Parkway Southeast (milepost 10) will be closed overnight, 9 p.m. Thursday, Sept. 3 – 5 a.m. Friday, Sept. 4.”
✓
The agency advises drivers to slow down, watch for flaggers, and follow detour signs“Slow down, stay focused and watch for flaggers direction through the work zone.”
✓
Construction work is scheduled to end between Sept. 1 and Sept. 11 depending on the route“004: Monday, Aug. 17 through Friday, Sept. 11: A single lane in both directions of SR 4 between 50th Avenue (milepost 56.4) and 42nd Avenue (milepost 57.2) will be closed weekdays from 7:30 a.m. to 5 p.m., for buried gas main line extension work.”