What Happened to Erie Pennsylvania?

References:

US Census

https://fortleboeufhistory.com/campus...

https://www.epa.gov/mshtf/mississipp...

https://sites.rootsweb.com/~paerie/ba...

https://www.chooseerie.com/historyhe....

https://sova.si.edu/record/NMAH.AC.10....

https://explorepahistory.com/hmarker....
markerId=1AC1

https://www.sb3erie.com/history/

https://www.biggestuscities.com/pa/1960'>https://www.biggestuscities.com/pa/1960

https://www.biggestuscities.com/pa

https://www.trains.com/trn/newsrevie...

https://www.goerie.com/story/news/loc...

https://www.goerie.com/story/business...

https://www.goerie.com/story/business...

http://www.eriebuildings.info/buildin...

https://www.yourerie.com/news/localn...

Tichnor Brothers
Tomdonohue1

Images:

"Erie Pennsylvania" by catAsmith is licensed under CC BY 2.0.

"Erie Pennsylvania" by catAsmith is licensed under CC BY 2.0.

"Interchange" by Nicholas_T is licensed under CC BY 2.0.

"erie pennsylvania" by Slideshow Bruce is licensed under CC BY 2.0.

"Locomotive Builders Plate General Electric Corp, Erie, Pennsylvania, USA, 1973" by Photographer: Jennifer McNair is licensed under CC BY 4.0.

"Erie Insurance Arena (10690534686)" by m_kania is licensed under CC BY 2.0.

"File:FlagshipNiagaraDobbinsLandingErieJuly42009.jpg" by Dboldt is licensed under CC BY 3.0.

"Presque Isle Light view from the beach" by daveynin is licensed under CC BY 2.0.