West Seattle Blog just broke a story about problems with leaky “membranes” applied to both the Beacon Hill Reservoir at Jefferson Park and West Seattle’s Myrtle Reservoir projects.
Repairing the problem will require removal of grass, dirt and “drain rock” lids covering the nearly-completed reservoirs to get to the membrane material. After replacing the faulty waterproofing, it will be re-covered. Who pays for the repair work will likely be resolved in court, and how far out this pushes “completion” of the project is unknown.
Much, much more detail on the West Seattle Blog.