Two days before the grand opening of Foothills Parkway between Walland and Wears Valley, engineering students from the University of Tennessee and East Tennessee State University toured the bridges from within.

Bridge 2 spans 790 feet and is made up of 92 hollow concrete sections. The hollow portion within the bridge allows ample room for walking and allowed students to inspect the inner design of the bridge up close.

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MORE: Walk it before you can drive it: GSMNP to open "Missing Link" of Foothills Parkway to pedestrians

Map Missing Link
Map of Foothills Parkway plan. Black portions were completed in late-1960s, blue is incomplete construction underway, and purple is where construction is yet to begin. The Missing Link is highlighted in red between Walland and Wears Valley.

MORE: Bridging of the 'Missing Link' complete, final paving still needed

After Wednesday, only bridge inspectors will be allowed to enter the bridge's hollow center.

For Rich Pakhchanian, bridge engineer for the Eastern Federal Lands division of the Federal Highway Administration, the Missing Link has been a central aspect of his professional life.

Bridge 2 Missing Link
Bridge 2 along the Missing Link on the Foothills Parkway.

"For my entire career, for the office's entire career everybody has had some involvement with this project," Pakhchanian said. "From a scale from a zero to 10, I would rank it as a number 10. To work on this project is an opportunity."

In addition to the college engineering students, middle school students from Blount County also participated in educational programs from the Parkway on Wednesday.

APRIL 2017 | Foothills Parkway 'Missing Link' nearly bridged

NOVEMBER 2017 | Bridging of the 'Missing Link' complete, final paving still needed

MAY 2018 | Work on "missing link" on track to be completed by end of 2018