I am happy to report that despite a Sea-Tac airport record-breaking* just shy of ten inches of rain in October, there were no mudslides on the Sounder north route (which is, of course, the BNSF mainline from Seattle to Everett). Seems all of that hard work to stabilize the slopes has paid off. Which is not to say there won't be any slides this winter, but we are off to a good start**.
* From the 1890's to 1946, weather-related records were done at the old downtown Federal building. In 1946 record keeping moved to Sea-Tac airport. I don't have the earlier records handy--there could very well have been a rainier October, but at least it's the heaviest since 1946.
** In Seattle the "rain year" runs from October 1 through September 30. So rainfall is recorded both for a calendar year and also for a rain year.