B08_-_Attachment_5_-146798-ALPO-423-41023-Topo.pdf

This document comprises topographic sheets prepared by the United States Department of the Interior National Park Service for the Denver Service Center, specifically for the Staple Bend Unit located along the Allegheny Portage Railroad in Pennsylvania. The topographic survey sheets are reduced-size reproductions based on data from the Thomas Survey of 1981, with vertical datum referenced to USGS Monument Z-102. The sheets are presented at a scale of 1"=40' with graphic scales and contour intervals of 2 feet, depicting detailed terrain features, elevation contours, and geographic coordinates across multiple survey sections of the rail corridor area.

The document consists of 18 topographic sheets arranged sequentially to provide comprehensive coverage of the Staple Bend Unit surveyed area. Each sheet is clearly marked with its sheet number, drawing number, and region designation (Mid-Atlantic). The sheets employ standard cartographic conventions including contour lines, elevation markings, grid references, and directional indicators to represent the topographic characteristics of the railroad right-of-way and surrounding terrain. This appears to be a technical support document for planning, environmental assessment, or infrastructure management related to the National Park Service's stewardship of the Allegheny Portage Railroad historic site.