Staple Bend Tunnel
Subtitle: Allegheny Portage Railroad National Historic Site, Pennsylvania
By: prepared by Sellardse Grigg, Inc.
Contributors: Sellardse Griggs, Inc.; United States. National Park Service.
Publisher: U.S. Dept. of the Interior, National Park Service
Published: 1991
Place of publication: [Washington, D.C.?]
Language: eng
Subjects: Tunnels -- Pennsylvania -- Design -- History.; Railroad tunnels -- Pennsylvania -- History.; Allegheny Portage Railroad National Historic Site (Pa.)
Other titles: Allegheny Portage Railroad National Historic Site, Pennsylvania.; Historic structure report: Staple Bend Tunnel ....
Notes: Cover title: Historic structure report: Staple Bend Tunnel, Allegheny Portage Railroad National Historic Site, Pennsylvania.

"Historic structure report, architectural data section."

Shipping list no.: 91-705-P.

Includes bibliographical references.