ET refers to a member of the hoogspanningnet forum who in a forum thread provided me with the info of some new developments in the grid in that area. It is a long time ago so I don't quite know exactly what it was. It is not data taken from their map.

I can't help with surveying as I live in the Netherlands.

I was reviewing "power=station" objects in the area and came across this one. Since somebody had tagged is as power=station I assumed there had to be a substation here even if nothing is visible on Bing. Looking at the history I see that it was originally tagged as leisure=playground but then changed in the same changeset, could be an error by an inexperienced user with Potlatch. Should we change it back to leisure and delete the substation tag?