I was just reading some about that bridge and the trail/s , Seems that trail is out of the way the person writing about this trail says it took awhile to find the trail...
I'm thinking that it does seem unlikely anyone unfamiliar with the area would just happen to go hiking there. I wonder how far from the trail that abandoned welfare office was ?
This is part of the description / article I was reading :
"...
One of the more interesting of the dozen or so trails of the city is along the old Monon Railroad right-of-way east of town. Here the “High Bridge Trail” gives walkers a chance to experience tremendous vertigo and possible death by slippage on one of the most spectacular railroad bridges in northern Indiana.
The trailhead is a bit difficult to find but once we drove up the dead-end driveway through the inch of virgin snowfall, we bundled up and headed down the level, wide trail. It was obvious the only hikers in the past few days had been coyotes, fox and perhaps the odd squirrel.
We walked the .85 miles out to the old bridge, happy whenever we could slip below the level of surrounding fields out of the wind. Whenever the cold east wind was blocked by terrain or trees, the day and even the snow felt warm enough to slip on a pair of shorts for these winter-weary Hoosiers...." 1.
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Delphi: Monon High Bridge Trail hike | WildIndiana.com