Hi again diane9247

I just wanted to point out that it was Hill who provided those photos not me

Generally, the way to tell us apart is that if it sounds intelligent and well thought-through, it was probably Hill; if it sounds silly, it was probably me

PS I agree with Hale that it looks like a short pipeline. But I have not been able to come up with anything else yet either. The abandoned settlement was called "Severnoye" and the sea lion rookery apparently "Severnoye Lezhbishche". This article discusses a survey of sea lions conducted in the area.

But why a pipeline? ...more research required