Arch Springs Natural Bridge, Blair County, Pennsylvania
Photo by Jay Wilbur
NABSQNO 17T-736538-4498769. Arch Springs Natural Bridge is a waterfall natural bridge eroded through karstic limestone by a spring-fed tributary of Sinking Run in the small community of Arch Spring, Blair County, Pennsylvania. Although it is located on private property, it is easily viewed from the public road that crosses the tributary just downstream from the arch. Vreeland listed Arch Springs Natural Bridge in his catalog as number 13-6 and reported a span of 25 feet.