According to the Black River Historical Society's Lorain, Ohio book, the station's construction began in 1908 and it was in full operation around 1910. The postcard above was postmarked 1915 so it's a pretty early view.
Here's a later postcard view showing the whole harbor. Note the tiny image of the lighthouse off in the distance.
The Black River Historical Society's book notes that the station was replaced with a new, larger building in 1989. But however much the new building was needed, it's still not the same – more than twenty years later – for us old-timers to look down from the Bascule Bridge and not see the familiar, quaint original building.
Here's the "now" view from a week ago. It's quite a different scene with the Lorain treatment plant in the background. I remember when you were allowed to drive all the way around the plant and fish from its perimeter. But no more.