The Seattle Post Globe fills us in on the filling of an eighth “void” along the tunnel excavation route at 18th and Lander. Another potential void is also being examined at 17th as well. Crews are expected to complete investigation and repairs by May 22nd.
After the initial report of the sinkhole that rose all the way to the surface, subsequent voids were identified by reviewing records of excavation spoils for abnormally high readings originally attributed to mismeasurement, accuracy, or instrument calibration issues.
BHB reader Heidi wrote this morning about having seen crews working at these repair sites (and being a bit hesitant about answering questions) and pointed out the crumbling retaining wall nearby. Interestingly, in the Post Globe report Sound Transit spokesman Bruce Gray states no structural damage has been reported from these voids and that only a quarter-inch of settling has been measured, and none of that near the void sites.