State Route 18 near Tiger Mountain will see lane restrictions and closures throughout mid-to-late September as crews survey for an upcoming widening project. Eastbound restrictions run Sept. 10–11 and 13–14, westbound closures begin Sept. 15, and full eastbound closures start Sept. 23—all nightly from 9 p.m. to 5 a.m. Drivers should expect delays and use alternate routes; construction isn’t expected until summer 2030.
King County Metro bus service underwent major changes starting Saturday, affecting riders across the greater King County area. While the source doesn’t specify which routes or stations were impacted, Maple Valley residents who commute via Metro should check their regular routes for schedule and service adjustments. For specific details about how these changes affect local transit options, riders are encouraged to visit the King County Metro website or contact the agency directly.
WSDOT’s $48.8 million fish passage project will close SR 169 in Black Diamond starting Monday, August 17, 2026, for about 35 days to replace culverts blocking Rock Creek and unnamed tributaries. The multi-year project through 2028 will install five fish-passable structures, opening 4.6 miles of habitat for chum, coho, steelhead, and cutthroat salmon. Detours will guide traffic, and local access plus businesses remain open during work.
King County officials are warning residents about growing wildfire threats as hotter, drier summers increase risk across western Washington. With the potential for fires to start from a single ember, experts are urging homeowners to take steps to harden their properties against wildfire danger. This regional threat directly affects Maple Valley families living in our foothill community.
Washington Governor Bob Ferguson declared a statewide drought emergency in April due to unusually warm winter weather cutting snowpack to roughly half of normal levels. State officials warn of increased wildfire risk and urge residents to conserve water through early summer, though the Seattle-Tacoma area is not expected to face water supply issues. This marks the fourth statewide drought emergency since 2015.
WSDOT is conducting a four-night surveying project over Tiger Mountain on SR 18 starting Thursday, September 10, reducing eastbound traffic to a single lane from 9 p.m. to 5 a.m. through September 14. Additional westbound single-lane closures are planned for six nights beginning September 15, followed by full eastbound closures for six nights starting September 23. Maple Valley commuters using SR 18 should expect delays and plan extra travel time during these overnight restrictions.
SR 169 near Jones Lake in Black Diamond will see significant traffic changes affecting the region. One-lane reductions occur nightly from 8 p.m. to 5 a.m. through Friday, August 14, followed by a full 35-day closure starting Monday, August 17 at 12:01 a.m. between Southeast 332nd Street and Plass Road for fish barrier removal work. Maple Valley residents using SR 169 should plan for delays and check WSDOT updates.
Washington faces a concerning 2026 wildfire season ahead. An exceptionally warm winter left record-low snowpack across the state, especially east of the Cascades, and a dry spring has further desiccated vegetation. The Northwest Coordination Center forecasts above-normal wildfire potential in eastern Washington in June, spreading statewide by August. An emerging El Niño event could bring warmer, drier conditions and northerly winds that transport smoke into western Washington more frequently than recent years. Smoke-Ready Week runs June 1-5 to help residents prepare.
Starting mid-August, WSDOT will temporarily close SR 169 between Plass Road and SE 332nd Street for approximately 35 days to complete fish-passage improvements on Rock Creek and Ginder Creek. Signed detours will guide drivers around the construction zone during this regional project affecting the Black Diamond area and nearby communities.
Black Diamond is making progress on fish-passable culvert installations along SR 169 near Jones Lake. Since the road closed August 17, contractors have installed concrete structures at Rock Creek and an unnamed tributary after driving 260 timber posts for foundation support. Both directions of SR 169 are expected to reopen Monday, September 21, though wet weather could cause delays. Travelers should expect detour delays during afternoon commute times.
Seattle’s Route 40 Transit-Plus Multimodal Corridor Project is in its final construction phase, with crews completing finishing work in Ballard, Fremont, Westlake, and North Seattle. Final tasks include sidewalk repairs, landscaping restoration, sign installation, and pavement markings. Residents may see temporary lane restrictions and construction activity through the coming months as the project wraps up.