Bridge Unit and Construction Drawings (Multiple Counties and Sections), This Digital Object is provided in a collection that is included in POWER LIBRARY: Pennsylvania Photos and Documents, which is funded by the Office of Commonwealth Libraries of Pennsylvania/Pennsylvania Department of Education., Original drawings executed in the field relating to rights-of-way and grading of the Original Section of the Turnpike and its subsequent extensions. The majority are rendered in pencil or pen on sheets of engineering graph paper, and measure on average 32" x 38 1/4". Headings for either the Department of Transportation or the Pennsylvania Turnpike Commission are printed on the tops of the various pages. Most drawings are grouped in sets, with each set pertaining to a specific location along the Turnpike's route. Data varies from sheet to sheet, and may include: final book number, county, district number, contract number, section number, route number, drawing number, and general descriptive information. Drawings are primarily cross sections with some construction plan and profile drawings. Typical subjects include: grading sections, channel changes, borrow pits, bridges, culverts, ramps, overpasses, road relocations, viaducts, interchanges, tunnels, tunnel approaches, toll plazas, service stations, and maintenance buildings. Microfilm rolls contain Bridge Unit drawings, construction drawings for various sections, tunnels, and affiliated turnpike structures. Additional related materials can be found in RG/029/CSEC/143- Original Section Turnpike Alignment and Profile Blueprints. Not all records in this collection are digitized. Please visit the PA State Archives to see the rest of the collection.
