Dan answered this from the mail list so I've posted it here...
The Issaquah Costco charge location is parking space #29, located in the
employee parking garage underneath the Costco office building that's closest to
the store across the street. It is immediately to the right when you enter
the parking area, in front of the bicycle parking cage. The station amounts to two
240v outlets on the wall. One is a NEMA 14-50 (4-pin). I forget what the other one is,
but it has 3 pins. There is no signage whatsoever, although as of last week
there was a movable fluorescent cone/standard in the space itself.
Stephen Johnsen reports that the power has been live to the area on past visits.