Complex sentence: The path crosses the river on a concrete footbridge built in the 1960s on the site of the original tramway trestle bridge, the modern bridge has been built in the same style as the original wooden structure.
Split into simpler sentences: The path crosses the river on a concrete footbridge built in the 1960s on the site of the original tramway trestle bridge. The modern bridge has been built in the same style as the original wooden structure.