The published coordinates, of course, are not those of the final cache. To find all the actual coordinates, you must complete the "Chattanooga Firsts" Adventure Lab Cache.
Download the Adventure Lab app for iPhone or Android SmartPhone
https://labs.geocaching.com/goto/Chattanooga1st
FINAL: N 35° AB.CDE' W 85° FG.HIJ'
(Congratulations ehatch, grizz-rider, and Nanax697 for their co-FTFs on a cold, rainy day!)
However... in this case... the published coordinates are a place you want (and need) to visit, and you do want to read two historical signs at this location. Because the thing upon which you are standing, the Walnut Street Bridge, is yet another "Chattanooga First!"
On one of the signs at the published coordinates, you will see details about how high above low water level the water crested during a flood on March 11. The first digit of that is H. All of the other letters are in the Adventure Cache Journal pages.
Built in 1890, the 2,376 feet (724 m) Walnut Street Bridge is, according to the Historic American Engineering Record: "apparently the first non-military highway bridge across the Tennessee River." The bridge's main spans are pin-connected Pennsylvania through truss spans. The top chord of these truss spans are configured in five sections, making the spans similar to the Camelback truss design. The bridge is historically significant as an extremely long and old example of its type. Today it is one of the longest pedestrian bridges in the world.
The bridge is also a testament to historical preservation. After nearly a century of service, it was closed to traffic in 1978 and scheduled for demolition. But, before the city could secure the money to carry out the deed, many Chattanoogans stepped forward with millions of dollars (assisted by a US Department of Transportation grant) to restore and save the bridge. The span triumphantly reopened to pedestrian-only traffic in 1993, becoming a "bridge" to a revitalized riverfront and downtown. Today, you can walk along the well-lighted span, passing the hundreds of donor recognition plaques that are affixed to every decking board. Admire the magnificent stonework of the supporting piers reaching up from the river. Also take notice of the railings on both sides which protect you from the river: unlike many other historical preservation projects, these are original.
Incidentally, the true, hidden, final location may or may not be a relic of yet another "first." During the nineteenth and early twentieth centuries, as you just read on the historical sign on the bridge, Chattanooga experienced bouts of systemic flooding roughly every decade. After a record flood in 1867, the city began to raise the level of about 40 blocks of the city's streets from 3 to 15 feet. Could the final location, much like other structures that one can observe elsewhere downtown, be evidence of this? Unfortunately – and despite the diligent research of UTC Professor James Brown – very little documentation today exists. Still, one wonders.