Container is a black box, with a few swaps.
There are 3 ways of reaching the cache, one will put you within 250m of it. I'll leave it to you to work out which one!
A bit of local info provided by Obi Wan.
Just a bit of local history.... the three bridges are known locally as the Roman Bridges. However, they are believed to mediaeval, thirteenth century. John Ogilby's 'Britannia', published in 1675, was the first systematically surveyed road atlas of England and shows the main road from Lichfield to Chester crossing these bridges. It is believed that this route was in use up until the eighteenth century