This site is definitely worth some kind of strategic importance, looking back at imagery from 2002 you can see that it is constantly expanding through at least 2016. And after research on the area just to the north as mentioned previously there is a decommissioned DUGA radar, twenty five miles north west in Khurba you have a Sukhoi aircraft factory, where conveniently enough the first Su-57 flew. You also have near Komsomolsk-on-amur two S-300P Garrison's, and active batterys and all kinds of EW sites and indications of former SA-2 sites (no surprise, most soviet city's were covered as we all know.) These are obviously there to protect the city and surroundings as well as to block the approach to Ukrina Airbase, (One of the Russian Far East Strategic bomber bases). The more I look at it the more I think its a larger replacement to the DUGA. Is this some kind of new OTH radar? It will be interesting to find out. Having said all that, the small complexes on the 5km stretch to the north very closely resemble the storage and launching areas of the SS-25 sickle...There is also an OKO satellite (RU Space Force, ballistic missle launch detecting) control station 20km north west. Lots going on here.