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Know before you go. Make sure there aren't any unexpected delays in your drive by checking the weekly News Feed below for scheduled work project in Sammamish.

Please Note: Schedules may change due to weather and/or equipment availability.


Know before you go. Make sure there aren't any unexpected delays in your drive by checking the weekly News Feed below for scheduled work project in Sammamish.

Please Note: Schedules may change due to weather and/or equipment availability.

  • Road Projects for the Week of October 1 - 7

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    SE 24th Street Electric System Upgrade Project

    This is a PSE project. PSE and Potelco electric crews will be installing a new recloser on an existing utility pole on SE 24th Street between 244th Ave SE and 245th Ave SE. The work began on Wednesday September 28th and will complete on approximately Friday September 30th. SE 24th Street will be reduced to one lane with flaggers and signs directing traffic safely around the work area.


    Sidewalk Curb Ramp Reconstruction

    The City of Sammamish is working to implement its ADA Transition Plan. Sidewalk ramps in high pedestrian use areas and on streets scheduled for resurfacing next year are being reconstructed to improve accessibility. Below is more information on specific locations.

    The hours of work are 7:00 a.m. - 3:00 p.m. Due to the nature of this work, the sidewalks along the area of work will be closed and pedestrian detour routes will be provided and indicated with signage. During certain portions of this work, the road will be reduced to one lane of traffic. Reader boards are posted around areas of work to alert drivers and pedestrians. Pedestrians should expect delays and plan their routes accordingly. Drivers should use caution and expect minor delays.

    228th Avenue SE from Issaquah Pine Lake Road SE to SE 24th Street

    Work in this location will occur between August and October. The work crew will be staggering work at intersections to keep pedestrian pathways open.

    The specific areas of work are as follows:

    • Eastbound SE 24th St, concluding at Audubon Park Dr SE
    • The entrance to Discovery Elementary School
    • The intersection of 228th Ave SE and SE 24th St
    • Southbound 228th Ave SE along Pine Lake Park
    • The intersection of 228th and Issaquah-Pine Lake Rd SE

    Below is a map with the specific areas of work indicated in green.


    Klahanie Drive SE from SE Issaquah Fall City Road to 249th Avenue SE, and

    247th Place SE-246th Avenue SE-SE 43rd Place-244th Place SE from Issaquah Pine Lake Road SE to SE Klahanie Boulevard.

    Work on these streets is scheduled to last through December. The work crew will be staggering the construction to minimize impacts to pedestrian routes. Below is a map with the specific areas of work indicated in green


    East Lake Sammamish Trail South Segment B Stage 2 Construction

    This is a King County Trail Project

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 will begin construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

    • Project Start Point: Approximately 1,350’ south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE (STA 371+59)
    • Project End Point: Approximately 750’ south of the intersection of NE 16th Street / East Lake Sammamish Parkway SE (STA 468+00)

    The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

    For additional project information, please visit the project website: www.kingcounty.gov/eastlakesammamishtrail. You may also contact the project team directly by email at ELST@kingcounty.gov or by calling the project hotline at 1-888-668-4886.


    Puget Sound Energy Natural Gas Project

    Crews from Puget Sound Energy and InfraSource will be working to replace portions of the existing underground natural gas main with new, corrosion-resistant plastic pipe.

    Gas main work in the Tree Farm Neighborhood is ongoing. Work will take place between the hours of 8:00 a.m. to 4:00 p.m.

    The gas main replacement on NE 8th St is complete. Necessary asphalt restoration began in October. Work on NE 8th St. will take place Monday through Friday, 9:30 a.m. to 3:30 p.m.

    Traffic control flaggers and signs will guide vehicles and pedestrians safely around the project areas and there will be lane closures and revisions as crews move along the project route. The bus stop on NE 8th St will be moved 250 ft. west of its current location. Some street parking will be impacted. “No parking” signs will be placed in the areas prior to work beginning.

    Drivers should expect delays and use caution. Impacted streets are NE 8th St, NE 7th Ct, 237th Pl NE, NE 6th Ct, NE 6th St, NE 4th Pl, 238th Ave NE and 239th Ave NE, Sammamish. See maps of work below for more details.





    Striping and Thermoplastic Markings Maintenance Work

    The City will be performing striping and thermoplastic maintenance work on the city’s arterials throughout the summer to refresh existing fog lines, center lines, and thermoplastic markings. Thermoplastic markings include arrows, stop bars, bike symbols, and other markings in the roadway. The arterials being targeted are shown in the map below. This type of work requires dry road pavement so dry weather days are being targeted. Drivers should expect delays and use caution.



    East Lake Sammamish Trail South Segment B Stage 1 Construction

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

    • Project Start Point: Intersection of SE 33rd / East Lake Sammamish Shore Lane Drive SE
    • Project End Point: Approximately 900' south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE


    New School Zone Flashers on Issaquah - Pine Lake Road

    The city has installed three new school zone flashing signs on Issaquah-Pine Lake Road near Cedar Trails Elementary to alert drivers of walking students and the reduced speed of 20mph during drop off and pick up times. The exhibit below shows their locations. Drivers should slow down and use caution when these signs are flashing in the mornings and afternoons.


    Changes to SE 32nd and 244th Ave SE Intersection

    The city changed the intersection of SE 32nd and 244th Ave SE into an all-way stop control due to traffic concurrency issues. New stop signs and stop bars were placed on the approach legs of SE 32nd, in addition to the existing stop sign on 244th. This change took place the week of August 15th and advance warning message signs are in place. Drivers should slow down use caution with this new traffic control change.



    Notices for construction activity outside of the City of Sammamish:


    Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

    This is a King County Local Services project.

    King County Road Services Division is prioritizing 244th Ave NE near SR-202 to receive snow and ice pre-treatment. Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2023. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found, linked here.


    Downtown Redmond Link Extension (DRLE) - Sound Transit work

    This is a City of Redmond and Sound Transit project.

    *This work will begin on April 15, 2022, and last for 4 months.

    Crews are scheduled to close the on-ramp from Redmond Way to westbound SR 520 for four months in order to build a new on-ramp. This is part of the Redmond Link Extension construction. Drivers should plan accordingly due to the ramp closure. To stay up-to-date and learn more about this project, please visit the DRLE tab in Cone Zone.

  • Road Projects for the Week of September 24 - 30

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    Westbound I-90 Lane Reduction and Full Closure - 9/22-9/26

    This is a WSDOT project.

    Travelers can expect a complete closure of westbound I-90 at Island Crest Way on Mercer Island. Contractor crews working for WSDOT will replace the original expansion joint on the east end of the westbound I-90 Homer Hadley bridge that connects Mercer Island to Seattle. Below is a map of the area of work.

    This work will entail:

    • Westbound I-90 will be reduced to one lane on the west side of Mercer Island beginning at 6:00 p.m. Thursday, 9/22 through 10:00 a.m. Friday, 9/23
    • All lanes of westbound I-90 will close. One lane of the West Mercer Way on-ramp will remain open from 10:00 a.m. Friday, 9/23 to 5:00 a.m. Monday, 9/26.

    People traveling from the Eastside to the west side of Lake Washington will need to use either I-405 or SR 520, which is a toll bridge. More information on this project can be found on WSDOT's website, linked here.


    Sidewalk Curb Ramp Reconstruction

    The City of Sammamish is working to implement its ADA Transition Plan. Sidewalk ramps in high pedestrian use areas and on streets scheduled for resurfacing next year are being reconstructed to improve accessibility. Below is more information on specific locations.

    The hours of work are 7:00 a.m. - 3:00 p.m. Due to the nature of this work, the sidewalks along the area of work will be closed and pedestrian detour routes will be provided and indicated with signage. During certain portions of this work, the road will be reduced to one lane of traffic. Reader boards are posted around areas of work to alert drivers and pedestrians. Pedestrians should expect delays and plan their routes accordingly. Drivers should use caution and expect minor delays.

    228th Avenue SE from Issaquah Pine Lake Road SE to SE 24th Street

    Work in this location will occur between August and October. The work crew will be staggering work at intersections to keep pedestrian pathways open.

    The specific areas of work are as follows:

    • Eastbound SE 24th St, concluding at Audubon Park Dr SE
    • The entrance to Discovery Elementary School
    • The intersection of 228th Ave SE and SE 24th St
    • Southbound 228th Ave SE along Pine Lake Park
    • The intersection of 228th and Issaquah-Pine Lake Rd SE

    Below is a map with the specific areas of work indicated in green.


    Klahanie Drive SE from SE Issaquah Fall City Road to 249th Avenue SE, and

    247th Place SE-246th Avenue SE-SE 43rd Place-244th Place SE from Issaquah Pine Lake Road SE to SE Klahanie Boulevard.

    Work on these streets is scheduled to last through December. The work crew will be staggering the construction to minimize impacts to pedestrian routes. Below is a map with the specific areas of work indicated in green


    East Lake Sammamish Trail South Segment B Stage 2 Construction

    This is a King County Trail Project

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 will begin construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

    • Project Start Point: Approximately 1,350’ south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE (STA 371+59)
    • Project End Point: Approximately 750’ south of the intersection of NE 16th Street / East Lake Sammamish Parkway SE (STA 468+00)

    The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

    For additional project information, please visit the project website: www.kingcounty.gov/eastlakesammamishtrail. You may also contact the project team directly by email at ELST@kingcounty.gov or by calling the project hotline at 1-888-668-4886.


    Puget Sound Energy Natural Gas Project

    Crews from Puget Sound Energy and InfraSource will be working to replace portions of the existing underground natural gas main with new, corrosion-resistant plastic pipe.

    Gas main work in the Tree Farm Neighborhood is ongoing. Work will take place between the hours of 8:00 a.m. to 4:00 p.m.

    The gas main replacement on NE 8th St is complete. Necessary asphalt restoration began in September. Work on NE 8th St. will take place Monday through Friday, 8:00 a.m. to 4:00 p.m.

    Traffic control flaggers and signs will guide vehicles and pedestrians safely around the project areas and there will be lane closures and revisions as crews move along the project route. The bus stop on NE 8th St will be moved 250 ft. west of its current location. Some street parking will be impacted. “No parking” signs will be placed in the areas prior to work beginning.

    Drivers should expect delays and use caution. Impacted streets are NE 8th St, NE 7th Ct, 237th Pl NE, NE 6th Ct, NE 6th St, NE 4th Pl, 238th Ave NE and 239th Ave NE, Sammamish. See maps of work below for more details.





    Striping and Thermoplastic Markings Maintenance Work

    The City will be performing striping and thermoplastic maintenance work on the city’s arterials throughout the summer to refresh existing fog lines, center lines, and thermoplastic markings. Thermoplastic markings include arrows, stop bars, bike symbols, and other markings in the roadway. The arterials being targeted are shown in the map below. This type of work requires dry road pavement so dry weather days are being targeted. Drivers should expect delays and use caution.



    East Lake Sammamish Trail South Segment B Stage 1 Construction

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

    • Project Start Point: Intersection of SE 33rd / East Lake Sammamish Shore Lane Drive SE
    • Project End Point: Approximately 900' south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE


    New School Zone Flashers on Issaquah - Pine Lake Road

    The city has installed three new school zone flashing signs on Issaquah-Pine Lake Road near Cedar Trails Elementary to alert drivers of walking students and the reduced speed of 20mph during drop off and pick up times. The exhibit below shows their locations. Drivers should slow down and use caution when these signs are flashing in the mornings and afternoons.


    Changes to SE 32nd and 244th Ave SE Intersection

    The city changed the intersection of SE 32nd and 244th Ave SE into an all-way stop control due to traffic concurrency issues. New stop signs and stop bars were placed on the approach legs of SE 32nd, in addition to the existing stop sign on 244th. This change took place the week of August 15th and advance warning message signs are in place. Drivers should slow down use caution with this new traffic control change.



    Notices for construction activity outside of the City of Sammamish:


    Extended overnight lane reductions and ramp closures planned on I-405 in Bellevue - September 15-18

    This is a WSDOT project.

    Crews working for the Washington State Department of Transportation (WSDOT) will excavate and replace a damaged culvert under I-405 near the 112th Avenue Southeast/Lake Washington Boulevard Southeast (Exit 9) interchange. The repair work will take place from 11:00 p.m., Thursday, Sept. 15, until 9:00 p.m., Sunday, Sept. 18. These closures will cause significant delays throughout the weekend. WSDOT encourages travelers to plan ahead, allow extra time for travel and reschedule discretionary travel if possible.

    Lane reduction and ramp closure details Over the four days of work, crews plan to excavate and replace the existing culvert underneath I-405 in three phases. The phased work schedule is:

    • 11 p.m. Thursday, Sept. 15, to 5 p.m. Friday, Sept. 16: the southbound I-405 off-ramp to Exit 9 will be closed. Southbound I-405 will be reduced to two lanes between Coal Creek Parkway Southeast and Exit 9. Drivers wishing to exit southbound I-405 will detour to the Northeast 44th Street (Exit 7) off-ramp.
    • 11 p.m. Friday, Sept. 16 to 10 p.m. Saturday, Sept. 17: all lanes of I-405 at Exit 9 will be closed. Drivers will use the Exit 9 ramps as the detour with flaggers directing traffic.
    • 11 p.m. Saturday, Sept. 17 to 9 p.m. on Sunday, Sept. 18: the Exit 9 on-ramp to northbound I-405 will be closed. All other lanes and ramps will be open.

    Detour routes available for full interstate closure Signed detour routes will be in place for the 23-hour full interstate closure. From 11 p.m. Friday, Sept. 16, to 10 p.m. Saturday, Sept. 17, travelers will use the Exit 9 ramps as the detour with flaggers directing traffic. Travelers should expect heavier-than-normal traffic along those routes during the closures. For additional information regarding this closure, visit WSDOT's website, linked here.


    Westbound I-90 Closures in September

    This is a WSDOT project.

    September will bring several major closures on westbound Interstate 90 during the second half of September, including two east of Issaquah and two on the west end of Mercer Island.

    During the closures, contractor crews working for the Washington State Department of Transportation will repave a rough section of the interstate where water is seeping onto the roadway. The closures on the west side of Mercer Island will allow crews to replace an expansion joint on the westbound I-90 Homer Hadley Bridge.

    The closures east of Issaquah on westbound I-90 will take place:

    • 9:00 p.m. Sunday, Sept. 11 to 5:00 a.m. to Thursday, Sept. 15, reduced to one right lane.
    • 9:00 p.m. Sunday, Sept. 18 5:00 a.m. to Friday, Sept. 23, reduced to one left lane.

    The Mercer Island closures on westbound I-90 will be:

    • 10:00 a.m. Friday, Sept. 16 to 5:00 a.m. Monday, Sept. 19, the West Mercer Way on-ramp, the right lane of I-90 and the bike path closed.
    • 2:00 p.m. Thursday, Sept. 22 to 10:00 a.m. Friday, Sept. 23, westbound I-90 reduced to one lane west of 76th Avenue Southeast.
    • 10:00 a.m. Friday, Sept. 23 to 5:00 a.m. Monday, Sept. 26, all lanes of westbound I-90 to the Homer Hadley Bridge closed; one lane of the West Mercer Way on-ramp open.

    For more information on these closures, please visit WSDOT's I-90 website, linked here. People who are traveling can get real-time traffic information on their mobile phone with the WSDOT traffic app and by following the WSDOT traffic Twitter feed.


    Roundabout at ELSP and SE 43rd St

    This is a City of Issaquah project.

    The City of Issaquah awarded the contract for the East Lake Sammamish Parkway (ELSP) and SE 43rd Street Roundabout Revisions project to the contractor Northwest Cascade. Construction activities requiring the closure of the roundabout were completed in August.

    The City of Issaquah does not plan on closing the intersection again. Remaining work will include some traffic control, but will occur during normal weekday hours. Drivers should expect minor delays and use caution.

    More information on this project and the Project Manager's contact information can be found on the City of Issaquah's website, linked here.


    Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

    This is a King County Local Services project.

    King County Road Services Division is prioritizing 244th Ave NE near SR-202 to receive snow and ice pre-treatment. Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2023. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found, linked here.


    Downtown Redmond Link Extension (DRLE) - Sound Transit work

    This is a City of Redmond and Sound Transit project.

    *This work will begin on April 15, 2022, and last for 4 months.

    Crews are scheduled to close the on-ramp from Redmond Way to westbound SR 520 for four months in order to build a new on-ramp. This is part of the Redmond Link Extension construction. Drivers should plan accordingly due to the ramp closure. To stay up-to-date and learn more about this project, please visit the DRLE tab in Cone Zone.

  • Road Projects for the Week of September 17 - 23

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    Sidewalk Curb Ramp Reconstruction

    The City of Sammamish is working to implement its ADA Transition Plan. Sidewalk ramps in high pedestrian use areas and on streets scheduled for resurfacing next year are being reconstructed to improve accessibility. Below is more information on specific locations.

    The hours of work are 7:00 a.m. - 3:00 p.m. Due to the nature of this work, the sidewalks along the area of work will be closed and pedestrian detour routes will be provided and indicated with signage. During certain portions of this work, the road will be reduced to one lane of traffic. Reader boards are posted around areas of work to alert drivers and pedestrians. Pedestrians should expect delays and plan their routes accordingly. Drivers should use caution and expect minor delays.

    228th Avenue SE from Issaquah Pine Lake Road SE to SE 24th Street

    Work in this location will occur between August and October. The work crew will be staggering work at intersections to keep pedestrian pathways open.

    The specific areas of work are as follows:

    • Eastbound SE 24th St, concluding at Audubon Park Dr SE
    • The entrance to Discovery Elementary School
    • The intersection of 228th Ave SE and SE 24th St
    • Southbound 228th Ave SE along Pine Lake Park
    • The intersection of 228th and Issaquah-Pine Lake Rd SE

    Below is a map with the specific areas of work indicated in green.


    Klahanie Drive SE from SE Issaquah Fall City Road to 249th Avenue SE, and

    247th Place SE-246th Avenue SE-SE 43rd Place-244th Place SE from Issaquah Pine Lake Road SE to SE Klahanie Boulevard.

    Work on these streets is scheduled to last through December. The work crew will be staggering the construction to minimize impacts to pedestrian routes. Below is a map with the specific areas of work indicated in green


    East Lake Sammamish Trail South Segment B Stage 2 Construction

    This is a King County Trail Project

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 will begin construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

    • Project Start Point: Approximately 1,350’ south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE (STA 371+59)
    • Project End Point: Approximately 750’ south of the intersection of NE 16th Street / East Lake Sammamish Parkway SE (STA 468+00)

    The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

    For additional project information, please visit the project website: www.kingcounty.gov/eastlakesammamishtrail. You may also contact the project team directly by email at ELST@kingcounty.gov or by calling the project hotline at 1-888-668-4886.


    Drilling and Excavating in Pacific Estates Neighborhood

    Puget Sound Energy completed the drilling and excavating on NE 22nd St and 228th Ave NE in the Pacific Estates neighborhood for a remediation power cable replacement. Restoration is ongoing.


    Puget Sound Energy Natural Gas Project

    Crews from Puget Sound Energy and InfraSource will be working to replace portions of the existing underground natural gas main with new, corrosion-resistant plastic pipe.

    Gas main work in the Tree Farm Neighborhood is ongoing. Work will take place between the hours of 8:00 a.m. to 4:00 p.m.

    The gas main replacement on NE 8th St is complete. Necessary asphalt restoration will begin in September. Work on NE 8th St. will take place Monday through Friday, 8:00 a.m. to 4:00 p.m.

    Traffic control flaggers and signs will guide vehicles and pedestrians safely around the project areas and there will be lane closures and revisions as crews move along the project route. The bus stop on NE 8th St will be moved 250 ft. west of its current location. Some street parking will be impacted. “No parking” signs will be placed in the areas prior to work beginning.

    Drivers should expect delays and use caution. Impacted streets are NE 8th St, NE 7th Ct, 237th Pl NE, NE 6th Ct, NE 6th St, NE 4th Pl, 238th Ave NE and 239th Ave NE, Sammamish. See maps of work below for more details.





    Striping and Thermoplastic Markings Maintenance Work

    The City will be performing striping and thermoplastic maintenance work on the city’s arterials throughout the summer to refresh existing fog lines, center lines, and thermoplastic markings. Thermoplastic markings include arrows, stop bars, bike symbols, and other markings in the roadway. The arterials being targeted are shown in the map below. This type of work requires dry road pavement so dry weather days are being targeted. Drivers should expect delays and use caution.



    East Lake Sammamish Trail South Segment B Stage 1 Construction

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

    • Project Start Point: Intersection of SE 33rd / East Lake Sammamish Shore Lane Drive SE
    • Project End Point: Approximately 900' south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE


    New School Zone Flashers on Issaquah - Pine Lake Road

    The city has installed three new school zone flashing signs on Issaquah-Pine Lake Road near Cedar Trails Elementary to alert drivers of walking students and the reduced speed of 20mph during drop off and pick up times. The exhibit below shows their locations. Drivers should slow down and use caution when these signs are flashing in the mornings and afternoons.


    Changes to SE 32nd and 244th Ave SE Intersection

    The city changed the intersection of SE 32nd and 244th Ave SE into an all-way stop control due to traffic concurrency issues. New stop signs and stop bars were placed on the approach legs of SE 32nd, in addition to the existing stop sign on 244th. This change took place the week of August 15th and advance warning message signs are in place. Drivers should slow down use caution with this new traffic control change.



    Notices for construction activity outside of the City of Sammamish:


    Extended overnight lane reductions and ramp closures planned on I-405 in Bellevue - September 15-18

    This is a WSDOT project.

    Crews working for the Washington State Department of Transportation (WSDOT) will excavate and replace a damaged culvert under I-405 near the 112th Avenue Southeast/Lake Washington Boulevard Southeast (Exit 9) interchange. The repair work will take place from 11:00 p.m., Thursday, Sept. 15, until 9:00 p.m., Sunday, Sept. 18. These closures will cause significant delays throughout the weekend. WSDOT encourages travelers to plan ahead, allow extra time for travel and reschedule discretionary travel if possible.

    Lane reduction and ramp closure details Over the four days of work, crews plan to excavate and replace the existing culvert underneath I-405 in three phases. The phased work schedule is:

    • 11 p.m. Thursday, Sept. 15, to 5 p.m. Friday, Sept. 16: the southbound I-405 off-ramp to Exit 9 will be closed. Southbound I-405 will be reduced to two lanes between Coal Creek Parkway Southeast and Exit 9. Drivers wishing to exit southbound I-405 will detour to the Northeast 44th Street (Exit 7) off-ramp.
    • 11 p.m. Friday, Sept. 16 to 10 p.m. Saturday, Sept. 17: all lanes of I-405 at Exit 9 will be closed. Drivers will use the Exit 9 ramps as the detour with flaggers directing traffic.
    • 11 p.m. Saturday, Sept. 17 to 9 p.m. on Sunday, Sept. 18: the Exit 9 on-ramp to northbound I-405 will be closed. All other lanes and ramps will be open.

    Detour routes available for full interstate closure Signed detour routes will be in place for the 23-hour full interstate closure. From 11 p.m. Friday, Sept. 16, to 10 p.m. Saturday, Sept. 17, travelers will use the Exit 9 ramps as the detour with flaggers directing traffic. Travelers should expect heavier-than-normal traffic along those routes during the closures. For additional information regarding this closure, visit WSDOT's website, linked here.


    Westbound I-90 Closures in September

    This is a WSDOT project.

    September will bring several major closures on westbound Interstate 90 during the second half of September, including two east of Issaquah and two on the west end of Mercer Island.

    During the closures, contractor crews working for the Washington State Department of Transportation will repave a rough section of the interstate where water is seeping onto the roadway. The closures on the west side of Mercer Island will allow crews to replace an expansion joint on the westbound I-90 Homer Hadley Bridge.

    The closures east of Issaquah on westbound I-90 will take place:

    • 9:00 p.m. Sunday, Sept. 11 to 5:00 a.m. to Thursday, Sept. 15, reduced to one right lane.
    • 9:00 p.m. Sunday, Sept. 18 5:00 a.m. to Friday, Sept. 23, reduced to one left lane.

    The Mercer Island closures on westbound I-90 will be:

    • 10:00 a.m. Friday, Sept. 16 to 5:00 a.m. Monday, Sept. 19, the West Mercer Way on-ramp, the right lane of I-90 and the bike path closed.
    • 2:00 p.m. Thursday, Sept. 22 to 10:00 a.m. Friday, Sept. 23, westbound I-90 reduced to one lane west of 76th Avenue Southeast.
    • 10:00 a.m. Friday, Sept. 23 to 5:00 a.m. Monday, Sept. 26, all lanes of westbound I-90 to the Homer Hadley Bridge closed; one lane of the West Mercer Way on-ramp open.

    For more information on these closures, please visit WSDOT's I-90 website, linked here. People who are traveling can get real-time traffic information on their mobile phone with the WSDOT traffic app and by following the WSDOT traffic Twitter feed.


    Roundabout at ELSP and SE 43rd St

    This is a City of Issaquah project.

    The City of Issaquah awarded the contract for the East Lake Sammamish Parkway (ELSP) and SE 43rd Street Roundabout Revisions project to the contractor Northwest Cascade. Construction activities requiring the closure of the roundabout were completed in August.

    The City of Issaquah does not plan on closing the intersection again. Remaining work will include some traffic control, but will occur during normal weekday hours. Drivers should expect minor delays and use caution.

    More information on this project and the Project Manager's contact information can be found on the City of Issaquah's website, linked here.


    Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

    This is a King County Local Services project.

    King County Road Services Division is prioritizing 244th Ave NE near SR-202 to receive snow and ice pre-treatment. Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2023. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found, linked here.


    Downtown Redmond Link Extension (DRLE) - Sound Transit work

    This is a City of Redmond and Sound Transit project.

    *This work will begin on April 15, 2022, and last for 4 months.

    Crews are scheduled to close the on-ramp from Redmond Way to westbound SR 520 for four months in order to build a new on-ramp. This is part of the Redmond Link Extension construction. Drivers should plan accordingly due to the ramp closure. To stay up-to-date and learn more about this project, please visit the DRLE tab in Cone Zone.

  • Road Projects for the Week of September 10 - 16

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    Back to School Slow Downs

    It's that time of year again! The 2022-2023 school year is here. Below are first-day-of-school dates for schools/school districts in Sammamish. Drivers should expect delays and use extreme caution when in and near school zones.

    • Lake Washington school district – Tuesday, September 6, 2022
    • Issaquah school district – Tuesday, August 30, 2022
    • Eastside Catholic School – Wednesday, August 31, 2022


    New School Zone Flashers on Issaquah - Pine Lake Road

    The city has installed three new school zone flashing signs on Issaquah-Pine Lake Road near Cedar Trails Elementary to alert drivers of walking students and the reduced speed of 20mph during drop off and pick up times. The exhibit below shows their locations. Drivers should slow down and use caution when these signs are flashing in the mornings and afternoons.


    Asphalt Repairs on SE 43rd Way

    The City's streets maintenance crews will be repairing the asphalt on SE 43rd Way. There will be lane restrictions on SE 43rd Way, between East Lake Sammamish Parkway and Providence Point, to accommodate this work. Drivers should expect delays and use caution.


    Sidewalk Curb Ramp Reconstruction

    The City of Sammamish is tearing down and reconstructing sidewalks across Sammamish in order to comply with the American Disabilities Act standards for intersection curb ramps and sidewalk width.

    This work began in August 2022 and will be completed November - December 2022. The hours of work are 7:00 a.m. - 3:00 p.m. Due to the nature of this work, the sidewalks along the area of work will be closed and pedestrian detour routes will be provided and indicated with signage. During certain portions of this work, the road will be reduced to one lane of traffic. Reader boards are posted around areas of work to alert drivers and pedestrians. Pedestrians should expect delays and plan their routes accordingly. Drivers should use caution and expect minor delays.

    228th Ave SE: The limits of this work are from SE 24th St (by Discovery Elementary School) to Issaquah-Pine Lake Rd SE. The specific areas of work are as follows:

    • Eastbound SE 24th St, concluding at Audubon Park Dr SE
    • The entrance to Discovery Elementary School
    • The intersection of 228th Ave SE and SE 24th St
    • Southbound 228th Ave SE along Pine Lake Park
    • The intersection of 228th and Issaquah-Pine Lake Rd SE

    Below is a map with the specific areas of work indicated in green.

    Klahanie: The limits of this work are SE Issaquah-Fall City Road and SE Klahanie Blvd and Klahanie Dr SE. All the intersection sidewalks will be torn down and reconstructed along the areas of work.

    Work in Klahanie will begin on Monday, August 29. Below is a map with the areas of work indicated in green.


    East Lake Sammamish Trail South Segment B Stage 2 Construction

    This is a King County Trail Project

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 will begin construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

    • Project Start Point: Approximately 1,350’ south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE (STA 371+59)
    • Project End Point: Approximately 750’ south of the intersection of NE 16th Street / East Lake Sammamish Parkway SE (STA 468+00)

    The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

    For additional project information, please visit the project website: www.kingcounty.gov/eastlakesammamishtrail. You may also contact the project team directly by email at ELST@kingcounty.gov or by calling the project hotline at 1-888-668-4886.


    Drilling and Excavating in Pacific Estates Neighborhood

    Puget Sound Energy completed the drilling and excavating on NE 22nd St and 228th Ave NE in the Pacific Estates neighborhood for a remediation power cable replacement. Restoration is ongoing.


    Puget Sound Energy Natural Gas Project

    Crews from Puget Sound Energy and InfraSource will be working to replace portions of the existing underground natural gas main with new, corrosion-resistant plastic pipe.

    Gas main work in the Tree Farm Neighborhood is ongoing. Work will take place between the hours of 8:00 a.m. to 4:00 p.m.

    The gas main replacement on NE 8th St is complete. Necessary asphalt restoration will begin in September. Work on NE 8th St. will take place Monday through Friday, 8:00 a.m. to 4:00 p.m.

    Traffic control flaggers and signs will guide vehicles and pedestrians safely around the project areas and there will be lane closures and revisions as crews move along the project route. The bus stop on NE 8th St will be moved 250 ft. west of its current location. Some street parking will be impacted. “No parking” signs will be placed in the areas prior to work beginning.

    Drivers should expect delays and use caution. Impacted streets are NE 8th St, NE 7th Ct, 237th Pl NE, NE 6th Ct, NE 6th St, NE 4th Pl, 238th Ave NE and 239th Ave NE, Sammamish. See maps of work below for more details.





    Changes to SE 32nd and 244th Ave SE Intersection

    The city changed the intersection of SE 32nd and 244th Ave SE into an all-way stop control due to traffic concurrency issues. New stop signs and stop bars were placed on the approach legs of SE 32nd, in addition to the existing stop sign on 244th. This change took place the week of August 15th and advance warning message signs are in place. Drivers should slow down use caution with this new traffic control change.


    Striping and Thermoplastic Markings Maintenance Work

    The City will be performing striping and thermoplastic maintenance work on the city’s arterials throughout the summer to refresh existing fog lines, center lines, and thermoplastic markings. Thermoplastic markings include arrows, stop bars, bike symbols, and other markings in the roadway. The arterials being targeted are shown in the map below. This type of work requires dry road pavement so dry weather days are being targeted. Drivers should expect delays and use caution.



    East Lake Sammamish Trail South Segment B Stage 1 Construction

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

    • Project Start Point: Intersection of SE 33rd / East Lake Sammamish Shore Lane Drive SE
    • Project End Point: Approximately 900' south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE


    Notices for construction activity outside of the City of Sammamish:


    Issaquah Traffic Alert: 17th & 12th Avenue Northwest

    This is a City of Issaquah project.

    Beginning on Tuesday, Sept. 13, an eastbound lane of 17th Avenue Northwest (SR 900) will be closed for utility work being done by Comcast. There will also be a lane closure on 12th Avenue Northwest. The closures will be between 9 a.m. to 4 p.m. Work is expected to finish on Friday, Sept. 16.


    Westbound I-90 Closures in September

    This is a WSDOT project.

    September will bring several major closures on westbound Interstate 90 during the second half of September, including two east of Issaquah and two on the west end of Mercer Island.

    During the closures, contractor crews working for the Washington State Department of Transportation will repave a rough section of the interstate where water is seeping onto the roadway. The closures on the west side of Mercer Island will allow crews to replace an expansion joint on the westbound I-90 Homer Hadley Bridge.

    The closures east of Issaquah on westbound I-90 will take place:

    • 9:00 p.m. Sunday, Sept. 11 to 5:00 a.m. to Thursday, Sept. 15, reduced to one right lane.
    • 9:00 p.m. Sunday, Sept. 18 5:00 a.m. to Friday, Sept. 23, reduced to one left lane.

    The Mercer Island closures on westbound I-90 will be:

    • 10:00 a.m. Friday, Sept. 16 to 5:00 a.m. Monday, Sept. 19, the West Mercer Way on-ramp, the right lane of I-90 and the bike path closed.
    • 2:00 p.m. Thursday, Sept. 22 to 10:00 a.m. Friday, Sept. 23, westbound I-90 reduced to one lane west of 76th Avenue Southeast.
    • 10:00 a.m. Friday, Sept. 23 to 5:00 a.m. Monday, Sept. 26, all lanes of westbound I-90 to the Homer Hadley Bridge closed; one lane of the West Mercer Way on-ramp open.

    For more information on these closures, please visit WSDOT's I-90 website, linked here. People who are traveling can get real-time traffic information on their mobile phone with the WSDOT traffic app and by following the WSDOT traffic Twitter feed.


    Roundabout at ELSP and SE 43rd St

    This is a City of Issaquah project.

    The City of Issaquah awarded the contract for the East Lake Sammamish Parkway (ELSP) and SE 43rd Street Roundabout Revisions project to the contractor Northwest Cascade. Construction activities requiring the closure of the roundabout were completed in August.

    The City of Issaquah does not plan on closing the intersection again. Remaining work will include some traffic control, but will occur during normal weekday hours. Drivers should expect minor delays and use caution.

    More information on this project and the Project Manager's contact information can be found on the City of Issaquah's website, linked here.


    Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

    This is a King County Local Services project.

    King County Road Services Division is prioritizing 244th Ave NE near SR-202 to receive snow and ice pre-treatment. Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2023. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found, linked here.


    Downtown Redmond Link Extension (DRLE) - Sound Transit work

    This is a City of Redmond and Sound Transit project.

    *This work will begin on April 15, 2022, and last for 4 months.

    Crews are scheduled to close the on-ramp from Redmond Way to westbound SR 520 for four months in order to build a new on-ramp. This is part of the Redmond Link Extension construction. Drivers should plan accordingly due to the ramp closure. To stay up-to-date and learn more about this project, please visit the DRLE tab in Cone Zone.

  • Road Projects for the Week of September 3 - 9

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    Back to School Slow Downs

    It's that time of year again! The 2022-2023 school year is here! Below are first-day-of-school dates for schools/school districts in Sammamish. Drivers should expect delays and use caution when in and near school zones.

    • Lake Washington school district – Tuesday, September 6, 2022
    • Issaquah school district – Tuesday, August 30, 2022
    • Eastside Catholic School – Wednesday, August 31, 2022


    New School Zone Flashers on Issaquah - Pine Lake Road

    The city is in the process of defining a reduced speed school zone by installing three new school zone flashing signs on Issaquah-Pine Lake Road near Cedar Trails Elementary to alert drivers of walking students and the reduced speed of 20mph during drop off and pick up times. The exhibit below shows their locations. The city plans to have these running at the end of August when schools start. Drivers should slow down and use caution when these signs are flashing.


    Sidewalk Curb Ramp Reconstruction

    The City of Sammamish is tearing down and reconstructing sidewalks across Sammamish in order to comply with the American Disabilities Act standards for intersection curb ramps and sidewalk width.

    This work began in August 2022 and will be completed November - December 2022. The hours of work are 7:00 a.m. - 3:00 p.m. Due to the nature of this work, the sidewalks along the area of work will be closed and pedestrian detour routes will be provided and indicated with signage. During certain portions of this work, the road will be reduced to one lane of traffic. Reader boards are posted around areas of work to alert drivers and pedestrians. Pedestrians should expect delays and plan their routes accordingly. Drivers should use caution and expect minor delays.

    228th Ave SE: The limits of this work are from SE 24th St (by Discovery Elementary School) to Issaquah-Pine Lake Rd SE. The specific areas of work are as follows:

    • Eastbound SE 24th St, concluding at Audubon Park Dr SE
    • The entrance to Discovery Elementary School
    • The intersection of 228th Ave SE and SE 24th St
    • Southbound 228th Ave SE along Pine Lake Park
    • The intersection of 228th and Issaquah-Pine Lake Rd SE

    Below is a map with the specific areas of work indicated in green.

    Klahanie: The limits of this work are SE Issaquah-Fall City Road and SE Klahanie Blvd and Klahanie Dr SE. All the intersection sidewalks will be torn down and reconstructed along the areas of work.

    Work in Klahanie will begin on Monday, August 29. Below is a map with the areas of work indicated in green.


    Asphalt Repairs on SE 43rd Way

    The City's streets maintenance crews will be repairing the asphalt on SE 43rd Way. There will be lane restrictions on SE 43rd Way, between East Lake Sammamish Parkway and Providence Point, to accommodate this work. Drivers should expect delays and use caution.


    East Lake Sammamish Trail South Segment B Stage 2 Construction

    This is a King County Trail Project

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 will begin construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

    • Project Start Point: Approximately 1,350’ south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE (STA 371+59)
    • Project End Point: Approximately 750’ south of the intersection of NE 16th Street / East Lake Sammamish Parkway SE (STA 468+00)

    The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

    For additional project information, please visit the project website: www.kingcounty.gov/eastlakesammamishtrail. You may also contact the project team directly by email at ELST@kingcounty.gov or by calling the project hotline at 1-888-668-4886.


    Drilling and Excavating in Pacific Estates Neighborhood

    Puget Sound Energy completed the drilling and excavating on NE 22nd St and 228th Ave NE in the Pacific Estates neighborhood for a remediation power cable replacement. Restoration is ongoing.


    Puget Sound Energy Natural Gas Project

    Crews from Puget Sound Energy and InfraSource will be working to replace portions of the existing underground natural gas main with new, corrosion-resistant plastic pipe.

    Gas main work in the Tree Farm Neighborhood is ongoing. Work will take place between the hours of 8:00 a.m. to 4:00 p.m.

    The gas main replacement on NE 8th St is complete. Necessary asphalt restoration will begin in September. Work on NE 8th St. will take place Monday through Friday, 8:00 a.m. to 4:00 p.m.

    Traffic control flaggers and signs will guide vehicles and pedestrians safely around the project areas and there will be lane closures and revisions as crews move along the project route. The bus stop on NE 8th St will be moved 250 ft. west of its current location. Some street parking will be impacted. “No parking” signs will be placed in the areas prior to work beginning.

    Drivers should expect delays and use caution. Impacted streets are NE 8th St, NE 7th Ct, 237th Pl NE, NE 6th Ct, NE 6th St, NE 4th Pl, 238th Ave NE and 239th Ave NE, Sammamish. See maps of work below for more details.





    Changes to SE 32nd and 244th Ave SE Intersection

    The city changed the intersection of SE 32nd and 244th Ave SE into an all-way stop control due to traffic concurrency issues. New stop signs and stop bars were placed on the approach legs of SE 32nd, in addition to the existing stop sign on 244th. This change took place the week of August 15th and advance warning message signs are in place. Drivers should slow down use caution with this new traffic control change.


    Striping and Thermoplastic Markings Maintenance Work

    The City will be performing striping and thermoplastic maintenance work on the city’s arterials throughout the summer to refresh existing fog lines, center lines, and thermoplastic markings. Thermoplastic markings include arrows, stop bars, bike symbols, and other markings in the roadway. The arterials being targeted are shown in the map below. This type of work requires dry road pavement so dry weather days are being targeted. Drivers should expect delays and use caution.



    East Lake Sammamish Trail South Segment B Stage 1 Construction

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

    • Project Start Point: Intersection of SE 33rd / East Lake Sammamish Shore Lane Drive SE
    • Project End Point: Approximately 900' south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE


    Notices for construction activity outside of the City of Sammamish:

    Westbound I-90 Closures in September

    This is a WSDOT project.

    September will bring several major closures on westbound Interstate 90 during the second half of September, including two east of Issaquah and two on the west end of Mercer Island.

    During the closures, contractor crews working for the Washington State Department of Transportation will repave a rough section of the interstate where water is seeping onto the roadway. The closures on the west side of Mercer Island will allow crews to replace an expansion joint on the westbound I-90 Homer Hadley Bridge.

    The closures east of Issaquah on westbound I-90 will take place:

    • 9:00 p.m. Sunday, Sept. 11 to 5:00 a.m. to Thursday, Sept. 15, reduced to one right lane.
    • 9:00 p.m. Sunday, Sept. 18 5:00 a.m. to Friday, Sept. 23, reduced to one left lane.

    The Mercer Island closures on westbound I-90 will be:

    • 10:00 a.m. Friday, Sept. 16 to 5:00 a.m. Monday, Sept. 19, the West Mercer Way on-ramp, the right lane of I-90 and the bike path closed.
    • 2:00 p.m. Thursday, Sept. 22 to 10:00 a.m. Friday, Sept. 23, westbound I-90 reduced to one lane west of 76th Avenue Southeast.
    • 10:00 a.m. Friday, Sept. 23 to 5:00 a.m. Monday, Sept. 26, all lanes of westbound I-90 to the Homer Hadley Bridge closed; one lane of the West Mercer Way on-ramp open.

    For more information on these closures, please visit WSDOT's I-90 website, linked here. People who are traveling can get real-time traffic information on their mobile phone with the WSDOT traffic app and by following the WSDOT traffic Twitter feed.


    Roundabout at ELSP and SE 43rd St

    This is a City of Issaquah project.

    The City of Issaquah awarded the contract for the East Lake Sammamish Parkway (ELSP) and SE 43rd Street Roundabout Revisions project to the contractor Northwest Cascade. Construction activities began the first week of June. Work is projected to finish in late August.

    Plan to take alternate routes if possible and expect traffic delays. A detour map can be found below.

    More information on this project and the Project Manager's contact information can be found on the City of Issaquah's website, linked here.


    Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

    This is a King County Local Services project.

    King County Road Services Division is prioritizing 244th Ave NE near SR-202 to receive snow and ice pre-treatment. Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2023. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found linked here.


    Downtown Redmond Link Extension (DRLE) - Sound Transit work

    This is a City of Redmond and Sound Transit project.

    *This work will begin on April 15, 2022, and last for 4 months.

    Crews are scheduled to close the on-ramp from Redmond Way to westbound SR 520 for four months in order to build a new on-ramp. This is part of the Redmond Link Extension construction. Drivers should plan accordingly due to the ramp closure. To stay up-to-date and learn more about this project, please visit the DRLE tab in Cone Zone.

  • Road Projects for the Week of August 27 - September 2

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    Roundabout Closure at ELSP and SE 43rd St - August 27 - 29th

    This is a City of Issaquah project.

    The City of Issaquah awarded the contract for the East Lake Sammamish Parkway (ELSP) and SE 43rd Street Roundabout Revisions project to the contractor Northwest Cascade. Construction activities began the first week of June. Work is projected to finish in late August.

    August 27 - 29th Closure: The hours of this closure have changed. This roundabout closure will begin on Saturday, August 27 at approximately 2 a.m. for striping of the intersection and repairing damaged concrete. The roundabout is scheduled to open by 5 a.m. on Monday, August 29. During the closure, the intersection will be completely closed to all users, and a detour is provided by the City of Sammamish. Work will be allowed both during the day and night. There are variable message boards posted at all legs of the roundabout announcing this closure. This is the final closure of the roundabout.

    Plan to take alternate routes if possible and expect traffic delays. A detour map can be found below.

    More information on this project and the Project Manager's contact information can be found on the City of Issaquah's website, linked here.


    Asphalt Repairs on SE 43rd Way

    The City's streets maintenance crews will be repairing the asphalt on SE 43rd Way. There will be lane restrictions on SE 43rd Way, between East Lake Sammamish Parkway and Providence Point, to accommodate this work. Drivers should expect delays and use caution.


    Median Pruning on 228th Ave SE

    The City's landscape contractor is scheduled to finish the 228th Ave SE center median pruning on Thursday, September 1, 2022. The limits of this work are SE 16th Street and Issaquah Pine Lake Road SE. For this work there will be single lane closures on 228th Ave SE between the hours of 9:30 a.m. - 3:00 p.m. in accordance with the city’s lane restriction guidelines.


    Beaver Lake Triathlon - August 28th

    The Beaver Lake Triathlon will take place on August 28, 2022 from 8:30 a.m. - 10:30 a.m.

    There will be event and route signs places along the triathlon route. All runners/bicyclists/event participants are required to follow all "rules of the road" during the event. All participants shall observe traffic signs, traffic signals, and pedestrian cross walks in accordance with current motor vehicle laws. Flaggers will be located at intersections along the route. There will be no lane closures associated with this event, however drivers should use caution along the route and be aware of runners/bicyclists.

    Learn more about this event on the Beaver Lake Triathlon website, linked here. Below is a map of the event routes.


    Back to School Slow Downs

    It's that time of year again! The 2022-2023 school year is here! Below are first-day-of-school dates for schools/school districts in Sammamish. Drivers should expect delays and use caution when in and near school zones.

    • Lake Washington school district – Tuesday, September 6, 2022
    • Issaquah school district – Tuesday, August 30, 2022
    • Eastside Catholic School – Wednesday, August 31, 2022


    New School Zone Flashers on Issaquah - Pine Lake Road

    The city is in the process of defining a reduced speed school zone by installing three new school zone flashing signs on Issaquah-Pine Lake Road near Cedar Trails Elementary to alert drivers of walking students and the reduced speed of 20mph during drop off and pick up times. The exhibit below shows their locations. The city plans to have these running at the end of August when schools start. Drivers should slow down and use caution when these signs are flashing.


    Sidewalk Curb Ramp Reconstruction

    The City of Sammamish is tearing down and reconstructing sidewalks across Sammamish in order to comply with the American Disabilities Act standards for intersection curb ramps and sidewalk width.

    This work began in August 2022 and will be completed November - December 2022. The hours of work are 7:00 a.m. - 3:00 p.m. Due to the nature of this work, the sidewalks along the area of work will be closed and pedestrian detour routes will be provided and indicated with signage. During certain portions of this work, the road will be reduced to one lane of traffic. Reader boards are posted around areas of work to alert drivers and pedestrians. Pedestrians should expect delays and plan their routes accordingly. Drivers should use caution and expect minor delays.

    228th Ave SE: The limits of this work are from SE 24th St (by Discovery Elementary School) to Issaquah-Pine Lake Rd SE. The specific areas of work are as follows:

    • Eastbound SE 24th St, concluding at Audubon Park Dr SE
    • The entrance to Discovery Elementary School
    • The intersection of 228th Ave SE and SE 24th St
    • Southbound 228th Ave SE along Pine Lake Park
    • The intersection of 228th and Issaquah-Pine Lake Rd SE

    Below is a map with the specific areas of work indicated in green.

    Klahanie: The limits of this work are SE Issaquah-Fall City Road and SE Klahanie Blvd and Klahanie Dr SE. All the intersection sidewalks will be torn down and reconstructed along the areas of work.

    Work in Klahanie will begin on Monday, August 29. Below is a map with the areas of work indicated in green.


    East Lake Sammamish Trail South Segment B Stage 2 Construction

    This is a King County Trail Project

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 will begin construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

    • Project Start Point: Approximately 1,350’ south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE (STA 371+59)
    • Project End Point: Approximately 750’ south of the intersection of NE 16th Street / East Lake Sammamish Parkway SE (STA 468+00)

    The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

    For additional project information, please visit the project website: www.kingcounty.gov/eastlakesammamishtrail. You may also contact the project team directly by email at ELST@kingcounty.gov or by calling the project hotline at 1-888-668-4886.


    Drilling and Excavating in Pacific Estates Neighborhood

    Puget Sound Energy completed the drilling and excavating on NE 22nd St and 228th Ave NE in the Pacific Estates neighborhood for a remediation power cable replacement. Restoration is ongoing.


    Puget Sound Energy Natural Gas Project

    Crews from Puget Sound Energy and InfraSource will be working to replace portions of the existing underground natural gas main with new, corrosion-resistant plastic pipe.

    Gas Main work in the Tree Farm Neighborhood is ongoing. Work will take place between the hours of 8:00 a.m. to 4:00 p.m.

    Work on NE 8th St is ongoing. Work on NE 8th St. will take place Monday through Friday, 8:00 a.m. to 4:00 p.m.

    Traffic control flaggers and signs will guide vehicles and pedestrians safely around the project areas and there will be lane closures and revisions as crews move along the project route. The bus stop on NE 8th St will be moved 250 ft. west of its current location. Some street parking will be impacted. “No parking” signs will be placed in the areas prior to work beginning.

    Drivers should expect delays and use caution. Impacted streets are NE 8th St, NE 7th Ct, 237th Pl NE, NE 6th Ct, NE 6th St, NE 4th Pl, 238th Ave NE and 239th Ave NE, Sammamish. See maps of work below for more details.





    Changes to SE 32nd and 244th Ave SE Intersection

    The city changed the intersection of SE 32nd and 244th Ave SE into an all-way stop control due to traffic concurrency issues. New stop signs and stop bars were placed on the approach legs of SE 32nd, in addition to the existing stop sign on 244th. This change took place the week of August 15th and advance warning message signs are in place. Drivers should slow down use caution with this new traffic control change.


    Striping and Thermoplastic Markings Maintenance Work

    The City will be performing striping and thermoplastic maintenance work on the city’s arterials throughout the summer to refresh existing fog lines, center lines, and thermoplastic markings. Thermoplastic markings include arrows, stop bars, bike symbols, and other markings in the roadway. The arterials being targeted are shown in the map below. This type of work requires dry road pavement so dry weather days are being targeted. Drivers should expect delays and use caution.



    East Lake Sammamish Trail South Segment B Stage 1 Construction

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

    • Project Start Point: Intersection of SE 33rd / East Lake Sammamish Shore Lane Drive SE
    • Project End Point: Approximately 900' south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE


    Notices for construction activity outside of the City of Sammamish:

    Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

    This is a King County Local Services project.

    King County Road Services Division is prioritizing 244th Ave NE near SR-202 to receive snow and ice pre-treatment. Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2023. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found linked here.


    Downtown Redmond Link Extension (DRLE) - Sound Transit work

    This is a City of Redmond and Sound Transit project.

    *This work will begin on April 15, 2022, and last for 4 months.

    Crews are scheduled to close the on-ramp from Redmond Way to westbound SR 520 for four months in order to build a new on-ramp. This is part of the Redmond Link Extension construction. Drivers should plan accordingly due to the ramp closure. To stay up-to-date and learn more about this project, please visit the DRLE tab in Cone Zone.

  • Road Projects for the Week of August 20 - 26

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    Roundabout Closure at ELSP and SE 43rd St - August 26 - 28th

    This is a City of Issaquah project.

    The City of Issaquah awarded the contract for the East Lake Sammamish Parkway (ELSP) and SE 43rd Street Roundabout Revisions project to the contractor Northwest Cascade. Construction activities began the first week of June. Work is projected to take approximately two months to complete.

    August 26 - 28th Closure: The roundabout closure will begin on Friday, August 26 at approximately 7 p.m. for striping of the intersection and repairing damaged concrete. The roundabout is scheduled to open by 9 a.m. on Sunday, August 28. During these closures, the intersection will be completely closed to all users, and a detour is provided by the City of Sammamish. Work will be allowed both during the day and night. This is the final closure of the roundabout.

    Plan to take alternate routes if possible and expect traffic delays. A detour map can be found below.

    More information on this project and the Project Manager's contact information can be found on the City of Issaquah's website, linked here.


    Back to School Slow Downs

    It's that time of year again! The 2022-2023 school year is here! Below are first-day-of-school dates for schools/school districts in Sammamish. Drivers should expect delays and use caution when in and near school zones.

    • Lake Washington school district – Tuesday, September 6, 2022
    • Issaquah school district – Tuesday, August 30, 2022
    • Eastside Catholic School – Wednesday, August 31, 2022


    Asphalt Repairs on SE 43rd Way

    The City's streets maintenance crews will be repairing the asphalt on SE 43rd Way. There will be lane restrictions on SE 43rd Way, between East Lake Sammamish Parkway and Providence Point, to accommodate this work. Drivers should expect delays and use caution.


    Beaver Lake Triathlon - August 28th

    The Beaver Lake Triathlon will take place on August 28, 2022 from 8:30 a.m. - 10:30 a.m.

    There will be event and route signs places along the triathlon route. All runners/bicyclists/event participants are required to follow all "rules of the road" during the event. All participants shall observe traffic signs, traffic signals, and pedestrian cross walks in accordance with current motor vehicle laws. There will be no lane closures associated with this event, however motorists should use caution along the route and be aware of runners/bicyclists.

    Learn more about this event on the Beaver Lake Triathlon website, linked here. Below is a map of the event routes.


    New School Zone Flashers on Issaquah - Pine Lake Road

    The city is in the process of defining a reduced speed school zone by installing three new school zone flashing signs on Issaquah-Pine Lake Road near Cedar Trails Elementary to alert drivers of walking students and the reduced speed of 20mph during drop off and pick up times. The exhibit below shows their locations. The city plans to have these running at the end of August when schools start. Drivers should slow down and use caution when these signs are flashing.


    Sidewalk Reconstruction on 228th Ave SE

    The City of Sammamish will be tearing down and reconstructing the sidewalks of specific areas along 228th Ave SE in order to comply with the American Disabilities Act standards for intersection curb ramps and sidewalk width. The limits of this work are from SE 24th St (by Discovery Elementary School) to Issaquah-Pine Lake Rd SE. The specific areas of work are as follows:

    • Eastbound SE 24th St, concluding at Audubon Park Dr SE
    • The entrance to Discovery Elementary School
    • The intersection of 228th Ave SE and SE 24th St
    • Southbound 228th Ave SE along Pine Lake Park
    • The intersection of 228th and Issaquah-Pine Lake Rd SE

    This work will begin Monday, August 8 and will be completed in November 2022. The hours of work are 7:00 a.m. - 3:00 p.m. Due to the nature of this work, the sidewalks along the area of work will be closed and pedestrian detour routes will be provided and indicated with signage. During certain portions of this work, 228th Ave SE will be reduced to one lane of traffic. Reader boards are posted to alert drivers and pedestrians of this work. Pedestrians should expect delays and plan their routes accordingly. Drivers should use caution. Below is a map with the specific areas of work indicated in green.


    East Lake Sammamish Trail South Segment B Stage 2 Construction

    This is a King County Trail Project

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 will begin construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

    • Project Start Point: Approximately 1,350’ south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE (STA 371+59)
    • Project End Point: Approximately 750’ south of the intersection of NE 16th Street / East Lake Sammamish Parkway SE (STA 468+00)

    The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

    For additional project information, please visit the project website: www.kingcounty.gov/eastlakesammamishtrail. You may also contact the project team directly by email at ELST@kingcounty.gov or by calling the project hotline at 1-888-668-4886.


    Drilling and Excavating in Pacific Estates Neighborhood

    Puget Sound Energy completed the drilling and excavating on NE 22nd St and 228th Ave NE in the Pacific Estates neighborhood for a remediation power cable replacement. Restoration is ongoing.


    Puget Sound Energy Natural Gas Project

    Crews from Puget Sound Energy and InfraSource will be working to replace portions of the existing underground natural gas main with new, corrosion-resistant plastic pipe.

    Gas Main work in the Tree Farm Neighborhood is ongoing. Work will take place between the hours of 8:00 a.m. to 4:00 p.m.

    Work on NE 8th St is ongoing. Work on NE 8th St. will take place Monday through Friday, 8:00 a.m. to 4:00 p.m.

    Traffic control flaggers and signs will guide vehicles and pedestrians safely around the project areas and there will be lane closures and revisions as crews move along the project route. The bus stop on NE 8th St will be moved 250 ft. west of its current location. Some street parking will be impacted. “No parking” signs will be placed in the areas prior to work beginning.

    Drivers should expect delays and use caution. Impacted streets are NE 8th St, NE 7th Ct, 237th Pl NE, NE 6th Ct, NE 6th St, NE 4th Pl, 238th Ave NE and 239th Ave NE, Sammamish. See maps of work below for more details.





    Changes to SE 32nd and 244th Ave SE Intersection

    The city has changed the intersection of SE 32nd and 244th Ave SE into an all-way stop control due to traffic concurrency issues. New stop signs and stop bars were placed on the approach legs of SE 32nd, in addition to the existing stop sign on 244th. This change took place the week of August 15th and advance warning message signs are in place. Drivers should slow down use caution with this new traffic control change.


    Striping and Thermoplastic Markings Maintenance Work

    The City will be performing striping and thermoplastic maintenance work on the city’s arterials throughout the summer to refresh existing fog lines, center lines, and thermoplastic markings. Thermoplastic markings include arrows, stop bars, bike symbols, and other markings in the roadway. The arterials being targeted are shown in the map below. This type of work requires dry road pavement so dry weather days are being targeted. Drivers should expect delays and use caution.



    East Lake Sammamish Trail South Segment B Stage 1 Construction

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

    • Project Start Point: Intersection of SE 33rd / East Lake Sammamish Shore Lane Drive SE
    • Project End Point: Approximately 900' south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE


    Notices for construction activity outside of the City of Sammamish:

    Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

    This is a King County Local Services project.

    King County Road Services Division is prioritizing 244th Ave NE near SR-202 to receive snow and ice pre-treatment. Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2023. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found linked here.


    Downtown Redmond Link Extension (DRLE) - Sound Transit work

    This is a City of Redmond and Sound Transit project.

    *This work will begin on April 15, 2022, and last for 4 months.

    Crews are scheduled to close the on-ramp from Redmond Way to westbound SR 520 for four months in order to build a new on-ramp. This is part of the Redmond Link Extension construction. Drivers should plan accordingly due to the ramp closure. To stay up-to-date and learn more about this project, please visit the DRLE tab in Cone Zone.

  • Road Projects for the Week of August 13 - 19

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    Asphalt Repairs on SE 43rd Way

    The City's streets maintenance crews will be repairing the asphalt on SE 43rd Way. There will be lane restrictions on SE 43rd Way, between East Lake Sammamish Parkway and Providence Point, to accommodate this work. Work is expected to last from August 16 - 19. Drivers should expect delays and use caution.


    Changes to SE 32nd and 244th Ave SE Intersection - Monday August 15th

    The city plans to change the intersection of SE 32nd and 244th Ave SE into an all-way stop control due to traffic concurrency issues. New stop signs and stop bars will be placed on the approach legs of SE 32nd, in addition to the existing stop sign on 244th. This change is scheduled to take place the morning of Monday, August 15th. Drivers should slow down when workers are present and use caution with this new traffic control change.


    Sidewalk Reconstruction on 228th Ave SE

    The City of Sammamish will be tearing down and reconstructing the sidewalks of specific areas along 228th Ave SE in order to comply with the American Disabilities Act standards for intersection curb ramps and sidewalk width. The limits of this work are from SE 24th St (by Discovery Elementary School) to Issaquah-Pine Lake Rd SE. The specific areas of work are as follows:

    • Eastbound SE 24th St, concluding at Audubon Park Dr SE
    • The entrance to Discovery Elementary School
    • The intersection of 228th Ave SE and SE 24th St
    • Southbound 228th Ave SE along Pine Lake Park
    • The intersection of 228th and Issaquah-Pine Lake Rd SE

    This work will begin Monday, August 8 and will be completed in November 2022. The hours of work are 7:00 a.m. - 3:00 p.m. Due to the nature of this work, the sidewalks along the area of work will be closed and pedestrian detour routes will be provided and indicated with signage. During certain portions of this work, 228th Ave SE will be reduced to one lane of traffic. Reader boards are posted to alert drivers and pedestrians of this work. Pedestrians should expect delays and plan their routes accordingly. Drivers should use caution. Below is a map with the specific areas of work indicated in green.


    East Lake Sammamish Trail South Segment B Stage 2 Construction

    This is a King County Trail Project

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 will begin construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

    • Project Start Point: Approximately 1,350’ south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE (STA 371+59)
    • Project End Point: Approximately 750’ south of the intersection of NE 16th Street / East Lake Sammamish Parkway SE (STA 468+00)

    The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

    For additional project information, please visit the project website: www.kingcounty.gov/eastlakesammamishtrail. You may also contact the project team directly by email at ELST@kingcounty.gov or by calling the project hotline at 1-888-668-4886.


    Drilling and Excavating in Pacific Estates Neighborhood

    Puget Sound Energy completed the drilling and excavating on NE 22nd St and 228th Ave NE in the Pacific Estates neighborhood for a remediation power cable replacement. Restoration (asphalt patching) is ongoing and should be complete within two weeks.


    Puget Sound Energy Natural Gas Project

    Crews from Puget Sound Energy and InfraSource will be working to replace portions of the existing underground natural gas main with new, corrosion-resistant plastic pipe. Residents of the Tree Farm Neighborhood should expect emails and/or door hanger notices about this work.

    Gas Main work in the Tree Farm Neighborhood will begin on Monday, May 16, 2022. Work will take place between the hours of 8:00 a.m. to 4:00 p.m.

    Work on NE 8th St is expected to begin the week of July 18, 2022, and last for approximately 2-3 weeks, with restoration of the pavement occurring afterwards. Work on NE 8th St. will take place Monday through Friday, 8:00 a.m. to 4:00 p.m.

    Traffic control flaggers and signs will guide vehicles and pedestrians safely around the project areas and there will be lane closures and revisions as crews move along the project route. The bus stop on NE 8th St will be moved 250 ft. west of its current location. Some street parking will be impacted. “No parking” signs will be placed in the areas prior to work beginning.

    Drivers should expect delays and use caution. Impacted streets are NE 8th St, NE 7th Ct, 237th Pl NE, NE 6th Ct, NE 6th St, NE 4th Pl, 238th Ave NE and 239th Ave NE, Sammamish. See maps of work below for more details.





    Striping and Thermoplastic Markings Maintenance Work

    The City will be performing striping and thermoplastic maintenance work on the city’s arterials throughout the summer to refresh existing fog lines, center lines, and thermoplastic markings. Thermoplastic markings include arrows, stop bars, bike symbols, and other markings in the roadway. The arterials being targeted are shown in the map below. This type of work requires dry road pavement so dry weather days are being targeted. Drivers should expect delays and use caution.



    East Lake Sammamish Trail South Segment B Stage 1 Construction

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

    • Project Start Point: Intersection of SE 33rd / East Lake Sammamish Shore Lane Drive SE
    • Project End Point: Approximately 900' south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE


    Notices for construction activity outside of the City of Sammamish:

    Roundabout Closure at ELSP and SE 43rd St

    This is a City of Issaquah project.

    The City of Issaquah has awarded the contract for the East Lake Sammamish Parkway (ELSP) and SE 43rd Street Roundabout Revisions project. Their contractor will be Northwest Cascade. Construction activities began the first week of June. Work is projected to take approximately two months to complete. A detour route map can be found below.

    There will be one more closure this summer. This is needed to stripe the roundabout.

    More information on this project and the Project Manager's contact information can be found on the City of Issaquah's website, linked here.


    Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

    This is a King County Local Services project.

    King County Road Services Division is prioritizing 244th Ave NE near SR-202 to receive snow and ice pre-treatment. Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2023. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found linked here.


    Downtown Redmond Link Extension (DRLE) - Sound Transit work

    This is a City of Redmond and Sound Transit project.

    *This work will begin on April 15, 2022, and last for 4 months.

    Crews are scheduled to close the on-ramp from Redmond Way to westbound SR 520 for four months in order to build a new on-ramp. This is part of the Redmond Link Extension construction. Drivers should plan accordingly due to the ramp closure. To stay up-to-date and learn more about this project, please visit the DRLE tab in Cone Zone.

  • Road Projects for the Week of August 6 - 12

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    Roundabout Closure at ELSP and SE 43rd St - August 5 - 8th

    This is a City of Issaquah project.

    The City of Issaquah has awarded the contract for the East Lake Sammamish Parkway (ELSP) and SE 43rd Street Roundabout Revisions project. Their contractor will be Northwest Cascade. Construction activities began the first week of June. Work is projected to take approximately two months to complete.

    August 5 - 8th Closure: The roundabout closure will begin on Friday, August 5 at approximately 7:00 p.m. This work will create some noise impact at night between the hours of 7:00 p.m. - 11:00 p.m. Paving operations will begin on the morning of August 6. The road will be opened back up on Sunday night, August 8th. During these closures, the intersection will be completely closed to all users. Work will be allowed both during the day and night.

    Plan to take alternate routes if possible and expect traffic delays. Variable message boards will be posted at all legs of the roundabout to notify the public of the closure. A detour route map can be found below.

    There will be one more closure after the August 5 - 8th closure, to take place approximately three weeks later. This is needed to stripe the roundabout.

    More information on this project and the Project Manager's contact information can be found on the City of Issaquah's website, linked here.


    Sidewalk Reconstruction on 228th Ave SE

    The City of Sammamish will be tearing down and reconstructing the sidewalks of specific areas along 228th Ave SE in order to comply with the American Disabilities Act standards for intersection curb ramps and sidewalk width. The limits of this work are from SE 24th St (by Discovery Elementary School) to Issaquah-Pine Lake Rd SE. The specific areas of work are as follows:

    • Eastbound SE 24th St, concluding at Audubon Park Dr SE
    • The entrance to Discovery Elementary School
    • The intersection of 228th Ave SE and SE 24th St
    • Southbound 228th Ave SE along Pine Lake Park
    • The intersection of 228th and Issaquah-Pine Lake Rd SE

    This work will begin Monday, August 8 and will be completed in November 2022. The hours of work are 7:00 a.m. - 3:00 p.m. Due to the nature of this work, the sidewalks along the area of work will be closed and pedestrian detour routes will be provided and indicated with signage. During certain portions of this work, 228th Ave SE will be reduced to one lane of traffic. Reader boards are posted to alert drivers and pedestrians of this work. Pedestrians should expect delays and plan their routes accordingly. Drivers should use caution. Below is a map with the specific areas of work indicated in green.


    East Lake Sammamish Trail South Segment B Stage 2 Construction

    This is a King County Trail Project

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 will begin construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

    • Project Start Point: Approximately 1,350’ south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE (STA 371+59)
    • Project End Point: Approximately 750’ south of the intersection of NE 16th Street / East Lake Sammamish Parkway SE (STA 468+00)

    The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

    For additional project information, please visit the project website: www.kingcounty.gov/eastlakesammamishtrail. You may also contact the project team directly by email at ELST@kingcounty.gov or by calling the project hotline at 1-888-668-4886.


    Drilling and Excavating in Pacific Estates Neighborhood

    Puget Sound Energy completed the drilling and excavating on NE 22nd St and 228th Ave NE in the Pacific Estates neighborhood for a remediation power cable replacement. Restoration (asphalt patching) is ongoing and should be complete within two weeks.


    Puget Sound Energy Natural Gas Project

    Crews from Puget Sound Energy and InfraSource will be working to replace portions of the existing underground natural gas main with new, corrosion-resistant plastic pipe. Residents of the Tree Farm Neighborhood should expect emails and/or door hanger notices about this work.

    Gas Main work in the Tree Farm Neighborhood will begin on Monday, May 16, 2022. Work will take place between the hours of 8:00 a.m. to 4:00 p.m.

    Work on NE 8th St is expected to begin the week of July 18, 2022, and last for approximately 2-3 weeks, with restoration of the pavement occurring afterwards. Work on NE 8th St. will take place Monday through Friday, 8:00 a.m. to 4:00 p.m. This work was put on hold and was rescheduled from June to July 2022.

    Traffic control flaggers and signs will guide vehicles and pedestrians safely around the project areas and there will be lane closures and revisions as crews move along the project route. The bus stop on NE 8th St will be moved 250 ft. west of its current location. Some street parking will be impacted. “No parking” signs will be placed in the areas prior to work beginning.

    Drivers should expect delays and use caution. Impacted streets are NE 8th St, NE 7th Ct, 237th Pl NE, NE 6th Ct, NE 6th St, NE 4th Pl, 238th Ave NE and 239th Ave NE, Sammamish. See maps of work below for more details.





    Striping and Thermoplastic Markings Maintenance Work

    The City will be performing striping and thermoplastic maintenance work on the city’s arterials throughout the summer to refresh existing fog lines, center lines, and thermoplastic markings. Thermoplastic markings include arrows, stop bars, bike symbols, and other markings in the roadway. The arterials being targeted are shown in the map below. This type of work requires dry road pavement so dry weather days are being targeted. Drivers should expect delays and use caution.



    Changes to SE 32nd and 244th Ave SE Intersection

    The city plans to change the intersection of SE 32nd and 244th Ave SE into an all-way stop control due to traffic concurrency issues. New stop signs and stop bars will be placed on the approach legs of SE 32nd, in addition to the existing stop sign on 244th. This change is planned to be implemented before the end of the summer. Drivers should use caution with this new traffic control change.


    East Lake Sammamish Trail South Segment B Stage 1 Construction

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

    • Project Start Point: Intersection of SE 33rd / East Lake Sammamish Shore Lane Drive SE
    • Project End Point: Approximately 900' south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE


    Notices for construction activity outside of the City of Sammamish:

    Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

    This is a King County Local Services project.

    King County Road Services Division is prioritizing 244th Ave NE near SR-202 to receive snow and ice pre-treatment. Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2023. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found linked here.


    Downtown Redmond Link Extension (DRLE) - Sound Transit work

    This is a City of Redmond and Sound Transit project.

    *This work will begin on April 15, 2022, and last for 4 months.

    Crews are scheduled to close the on-ramp from Redmond Way to westbound SR 520 for four months in order to build a new on-ramp. This is part of the Redmond Link Extension construction. Drivers should plan accordingly due to the ramp closure. To stay up-to-date and learn more about this project, please visit the DRLE tab in Cone Zone.

  • Road Projects for the Week of July 30 - August 5

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    Roundabout Closure at ELSP and SE 43rd St - August 5 - 8th

    This is a City of Issaquah project.

    The City of Issaquah has awarded the contract for the East Lake Sammamish Parkway (ELSP) and SE 43rd Street Roundabout Revisions project. Their contractor will be Northwest Cascade. Construction activities began the first week of June. Work is projected to take approximately two months to complete.

    August 5 - 8th Closure: The roundabout closure will begin on Friday, August 5 at approximately 7:00 p.m. This work will create some noise impact at night between the hours of 7:00 p.m. - 11:00 p.m. Paving operations will begin on the morning of August 6. The road will be opened back up on Sunday night, August 8th. During these closures, the intersection will be completely closed to all users, and a detour will be provided through the City of Sammamish. Work will be allowed both during the day and night.

    Variable message boards will be posted at all legs of the roundabout to notify the public of the closure.

    Plan to take alternate routes if possible and expect traffic delays. A detour route map can be found below. Additional signage will be in place throughout the closure. There will be one more closure after the August 5-8th closure, to take place approximately three weeks later. This is needed to stripe the roundabout.

    More information on this project can be found on the City of Issaquah's website, linked here. Project questions should be directed to Matt Ellis matte@issaquahwa.gov.


    East Lake Sammamish Trail South Segment B Stage 2 Construction

    This is a King County Trail Project

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 2 will begin construction in Spring 2022. All private property owners adjacent to the trail will be able to access their property during construction with limited exceptions for safety reasons. For example, access may be limited, or neighbors may experience short delays during major material unloading or wall construction along a lane. King County plans to incorporate flaggers/spotters on site on site to help pedestrians safely access their properties during daytime.

    • Project Start Point: Approximately 1,350’ south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE (STA 371+59)
    • Project End Point: Approximately 750’ south of the intersection of NE 16th Street / East Lake Sammamish Parkway SE (STA 468+00)

    The last uncompleted ELST section, the 1.9-miles from Pine Lake Creek to Inglewood Hill Road, will be closed for construction beginning in early June 2022 until December 2023.

    For additional project information, please visit the project website: www.kingcounty.gov/eastlakesammamishtrail. You may also contact the project team directly by email at ELST@kingcounty.gov or by calling the project hotline at 1-888-668-4886.


    Drilling and Excavating in Pacific Estates Neighborhood

    Puget Sound Energy completed the drilling and excavating on NE 22nd St and 228th Ave NE in the Pacific Estates neighborhood for a remediation power cable replacement. Restoration is anticipated to begin in later in July.


    Puget Sound Energy Natural Gas Project

    Crews from Puget Sound Energy and InfraSource will be working to replace portions of the existing underground natural gas main with new, corrosion-resistant plastic pipe. Residents of the Tree Farm Neighborhood should expect emails and/or door hanger notices about this work.

    Gas Main work in the Tree Farm Neighborhood will begin on Monday, May 16, 2022. Work will take place between the hours of 8:00 a.m. to 4:00 p.m.

    Work on NE 8th St is expected to begin the week of July 18, 2022, and last for approximately 2-3 weeks, with restoration of the pavement occurring afterwards. Work on NE 8th St. will take place Monday through Friday, 8:00 a.m. to 4:00 p.m. This work was put on hold and was rescheduled from June to July 2022.

    Traffic control flaggers and signs will guide vehicles and pedestrians safely around the project areas and there will be lane closures and revisions as crews move along the project route. The bus stop on NE 8th St will be moved 250 ft. west of its current location. Some street parking will be impacted. “No parking” signs will be placed in the areas prior to work beginning.

    Drivers should expect delays and use caution. Impacted streets are NE 8th St, NE 7th Ct, 237th Pl NE, NE 6th Ct, NE 6th St, NE 4th Pl, 238th Ave NE and 239th Ave NE, Sammamish. See maps of work below for more details.





    Striping Maintenance Work

    Arterials: The city will be performing striping and thermoplastic maintenance work on the city’s arterials throughout the summer to refresh existing fog lines, center lines, and thermoplastic markings. Thermoplastic markings include arrows, stop bars, bike symbols, and other markings in the roadway. The arterials being targeted are shown in the map below. This type of work requires dry road pavement so dry weather days are being targeted. Drivers should expect delays and use caution.



    Changes to SE 32nd and 244th Ave SE Intersection

    The city plans to change the intersection of SE 32nd and 244th Ave SE into an all-way stop control due to traffic concurrency issues. New stop signs and stop bars will be placed on the approach legs of SE 32nd, in addition to the existing stop sign on 244th. This change is planned to be implemented before the end of the summer. Drivers should use caution with this new traffic control change.


    East Lake Sammamish Trail South Segment B Stage 1 Construction

    The King County East Lake Sammamish Trail (ELST) South Segment B Phase 1 continues with construction. There will be traffic impacts related to the closure of the gravel surface trail segment which causes the re-routing of cyclists and pedestrians to East Lake Sammamish Parkway (ELSP). Additionally, there will be construction traffic on ELSP.

    • Project Start Point: Intersection of SE 33rd / East Lake Sammamish Shore Lane Drive SE
    • Project End Point: Approximately 900' south of the intersection of SE 8th Street / East Lake Sammamish Parkway SE


    Notices for construction activity outside of the City of Sammamish:

    Road maintenance on 244th Ave NE near Redmond Fall City Rd, (SR-202)

    This is a King County Local Services project.

    King County Road Services Division is prioritizing 244th Ave NE near SR-202 to receive snow and ice pre-treatment. Due to a slide occurring in winter 2020, both lanes of 244th Ave NE are narrowed until the impacted support wall can be repaired. The repair of the support wall is expected to begin in Summer 2023. Soil samples yielded unexpected data, which caused the design phase to be extended. King County Road Services Division has a 24/7 Road Helpline - (206) 477-8100. More information on this project can be found linked here.


    Downtown Redmond Link Extension (DRLE) - Sound Transit work

    This is a City of Redmond and Sound Transit project.

    *This work will begin on April 15, 2022, and last for 4 months.

    Crews are scheduled to close the on-ramp from Redmond Way to westbound SR 520 for four months in order to build a new on-ramp. This is part of the Redmond Link Extension construction. Drivers should plan accordingly due to the ramp closure. To stay up-to-date and learn more about this project, please visit the DRLE tab in Cone Zone.

Page last updated: 05 Oct 2022, 07:04 AM