A large tunnel system that extends for miles and holds a deep forgotten history of the city.

The Entrance Culvert: The first railroad culvert of its kind in the country.Build date 1829.

The Furnace
The Grand Staircases will go here (need photo).

Junction Chamber 1

Eastern Gwynns: Franklin & Pulaski St Branch

Upper Gwynns
PAGE IS INCOMPLETE
Reference and Credits
- Special thanks to ZOZE for Gwinn’s Furnace thumbnail
- a) Maryland Historical Magazine , 1921 – https://archive.org/stream/marylandhistoric1619mary/marylandhistoric1619mary_djvu.txt
- b) USGS 01589352 GWYNNS FALLS
- Edit History:
- September 2017 – Article created.
- October 2017 – Additional information added.
- December 2017 – Calculations .
- September 2018 – structural Dates Corrected.
- April 4, 2019 – Factual corrections,sources added, reformatted text and corrected grammar. moved first personal comments to a journal entry I. removed outfall output volume guestimate calculations and moved to journey entry I
- April 12, 2019 Post is converted into a gateway page, for entire storm sewer system.Working progress
- March 2, 2020: Complete restructureing after site migration.