The St. Paul Union Depot, also known affectionately as SPUD, was originally built in 1881, at which time it became a landmark transportation facility in downtown St. Paul, MN.
CSX Pinkerton Tunnel
As part of the National Gateway Clearance Project, the Pinkerton Tunnel, located in Markleton, PA, was to be removed because it did not have the required height clearance to accommodate double-stack freight railroad cars.
Where Are We Now with Sprayed Concrete Lining in Tunnels?
Traditional methods of sprayed concrete lining (SCL) tunnels (in soft ground) comprise a temporary primary lining of sprayed concrete with a sheet membrane inside and a permanent cast in-situ concrete lining, usually reinforced with steel bars
Fort McHenry Tunnel Miscellaneous Structural Repairs
At the time of its construction, the widest underwater tunnel in the world, the Fort McHenry Tunnel in Baltimore, MD, was opened to traffic in 1985.
How Carl Akeley Saved Christmas
For more than 50 years, the trees along Chicago?s North Michigan Avenue have been illuminated to signal the official kick-off of the holiday season and encourage everyone to join in the spirit and enjoy a host of festive experiences along Chicago?s Magnificent Mile.
Soudan Mine Shaft Rehabilitation
The Soudan Mine is a historic taconite and iron ore mine in Northeastern Minnesota.
Shotcrete Work in Confined Space Area
Shotcrete work, by its very nature, provides an excellent method of installing concrete materials in storage bins, hoppers, culverts, inlets, vaults, tanks, and other areas, where it is difficult to transport and efficiently install materials by conventional casting methods.
Meadow Brook Hall Historic Bridge Restoration
Meadow Brook Hall was built in the early twentieth century from the successes of automobile mogul John Dodge, his widow Matilda Dodge, and Matilda?s second husband Alfred Wilson.
Surface Preparation for Shotcrete Repair
When placing shotcrete in a concrete repair application, one cannot overstate the impor tance of the bond between the shot crete and the concrete substrate.
The Oregon City Bridge, Part II
This is the second of two articles discussing the Oregon City Bridge. The first article, ?The Oregon City Bridge, Part I,? was published in the Fall 2012 issue of Shotcrete and discussed the historical background of the bridge. This article covers the recently completed rehabilitation project.