Construction of the early-warning radar in Orsk is very much underway. Here is the radar - at 51.273346, 58.959030. It is looking almost directly South (170 degrees).
Google Earth tells us that there was nothing there just a year go - the image from 26 June 2013 shows only some marks where the new radar will be built.
UPDATE: Here are some photos of the Orsk radar (h/t AS).