sannkc
Just to add a few more data points for consideration: 

The [1896 Sanborn map](https://www.loc.gov/resource/g4104cm.g01790189610/?sp=110&r=-0.291,0.603,1.361,0.673,0) of this area shows that there was a small (very small) train station of sorts that was apparently named "Pacific Junction."  It was located on the east side of the north-south rail line (operated at the time by the Chicago Milwaukee & St Paul Railroad) near where the alley between Wabansia and Concord Place met the railroad right-of-way.  I haven't found any evidence that the station had any kind of regularly scheduled passenger service, so it may have been used only as a shelter for railway workers or something similar.  By the time the next Sanborn atlas of the area was completed (in 1921), the building was gone.  

There also was the ["Pacific Congregational Church"](https://www.loc.gov/resource/g4104cm.g01790189610/?sp=98&r=-0.052,0.467,0.851,0.421,0) at 3520 W. Cortland, where the [recently demolished](https://blockclubchicago.org/2020/10/28/early-1900s-logan-square-church-to-be-torn-down-replaced-by-single-family-home/) New Life Church stood.  The predecessor of the current Stowe Elementary School at Wabansia and St. Louis was known as ["Pacific Public School"](https://www.loc.gov/resource/g4104cm.g01790189610/?sp=113&r=-0.253,0.502,0.851,0.421,0).

Hope that helps some.