The spectacular Belmar Bridge over the Allegheny River was built in 1907 as part of a railroad built by local oil man Charles Miller and John D. Rockefeller intended to connect New York with Chicago. Ultimately, it transported much of the coal from Clarion County to Ashtabula on Lake Erie. https://www.avta-trails.org/sandy-creek-trail.php The bridge is 1,385' long or just over 1/4 mile and a spectacular view of the Alleghany River