Sunday, January 1, 2023

1914+1985 Indianapolis Blvd Bridges over Lake George (Indiana Harbor) Canal in East Chicago, IN

1914: (Bridge Hunter)

Photo from Scherzer Catalog via BridgeHunter-1914

IndianaHarbor via BridgeHunter-1985, License: Creative Commons Attribution-NonCommercial (CC BY-NC)

I can't tell if this is a trunnion or Scherzer bridge. I'm guessing it is a trunnion bridge.
3D Satellite

This is the confined disposal facility (CDF) into which the toxic sediments from dredging the Indiana Harbor is put. "Historic contamination by polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs) and heavy metals has put the canal under the Environmental Protection Agency's Grand Calumet River Area of Concern (AoC)—the only AoC to be listed impaired in all 14 beneficial use categories." [IH-Background] The site is a former refinery site that had contaminated the groundwater. The cut-off walls and 88 wells that are being built to contain the toxins from the sediments will also keep the contaminated ground water from migrating off site. [IH-Overview]

The bridge opens 8-12 times a day except during traffic rush hours when they are dredging. [IH-BridgeOperations] They have been dredging since 2012. (Before that, it had not been dredged since 1972.) Dredging for 2020 finished on Dec 13. They won't resume dredging until 2024 because the CDF is now full. They will increase the height of the dike walls from 21' to 32'. [IndianaEconomicDigest]

They encountered tar in the ground during the construction of the CDF!
IH-PhotoGallery, 16th photo in "Constructing the CDF"

I can't figure out how this 16-yard "environmental bucket" works. Normally for a clamshell, the second cable fastens to the middle, not to one side.
IH-PhotoGallery, 3rd photo in "Dredging"

The bridge gives us a good view of the CDF. Note the dike beyond the buildings.
Street View, Nov 2021

No comments:

Post a Comment