1 Mint no gum (MNG) â the stamp appears to be unused but has no gum. 2  It might have been used but not cancelled, or have been issued without gum. 3  Unmounted mint (UM) â the stamp is unused and appears never to have been mounted.
The Alaskan Way Viaduct replacement tunnel is a bored road tunnel that is under construction in the city of Seattle in the U.S. state of Washington. The project has been stalled since December 2013.No firm date for if/when the project will continue has been set.n January 12, 2009, the state of Washington, King County, the city of Seattle, and the Port of Seattle revealed that they had agreed to replace the viaduct with a bored underground tunnel.
Thatâs the last thing Pioneer Square workers and residents want to hear. âIt would really be a fiasco if they had to shut down the viaduct because of this,â Kevin McCluskey said. But who and how will they determine the safety of the viaduct is still the biggest concern for city leaders.Photo: KCPQ-TV). SEATTLE â Bertha canât seem to catch a break. The worldâs largest tunneling machine now faces a new problem, as engineers say the soil around the project has been settling, causing many to question the structural integrity of the pit and surrounding structures, including the Alaskan Way Viaduct.