This is a BIT Cache. This is a laminated tag, similiar in size and appearance to a Munzee. There is a sample Picture of a BIT Cache below in the "Pictures" section of this cache page.
The Harpersfield Covered Bridge was built in 1868 (renovated 1991-1992), and spans the Grand River, in Harpersfield Township, Ashtabula County, Ohio. At 228 feet long, it is the third longest covered bridge in Ohio, despite an "old" historical marker on site (picture below) that touts it as the longest in the State.
The same historical marker explains the somewhat strange combination of the Harpersfield Covered Bridge with an attached 140 foot long Steel Truss Bridge. The original Northern approach of the covered bridge was washed out during the great flood of 1913, resulting in the course of the River being altered.
The Harpersfield Covered Bridge Metropark encompasses land on both sides of the River, and there is ample parking on both sides, although the cache itself is located on the South Side. Alternative Geocaching website afficienados should note that the bridge is listed as a virtual cache on Terracaching.com, with it's logging password located 25 feet from this BIT Cache.
A very detailed hint, and spoiler photo have been provided, should you need them. Enjoy your visit, you will not be disappointed in the bridge itself, or the adjoining Metropark.
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Near the South end of the bridge, along the pedestrian walkway. Just before 2nd vertical support beam, the cache is underneath the bottom horizontal beam. See spoiler pic. You WILL have to get down and dirty to see this BIT and it's logging password, it sits about 6 inches above the wooden walkway.