Repository
Carnegie Library of Pittsburgh Archives and Special Collections
Title Liberty Tunnels Collection Collection Number CLP.20170708.001.LH Extent
29 Boxes
Stored in 28 record storage containers and 1 oversized storage
container.
Extent
2 Folders
Blueprints are stored in 7 oversized folders.
Date 1890-1928 Language
English . Author Christina Patton Publisher Carnegie Library of Pittsburgh Archives and Special Collections Address
4400 Forbes Avenuehttp://www.carnegielibrary.org/ Scope and Contents The collection contains daily to monthly accounts of the construction of the tunnels that
span the duration of the project, with the bulk of the materials dating between 1920 and
1923. These accounts include the amounts of materials used, weather conditions, measurements
to ensure accuracy of the work and construction techniques of the time that were utilized.
Many of these accounts were divided in the records based on the work areas, such as the
North End and South End. Also present in the collection are inspections and tests, mostly
for concrete and excavation. The collection also contains records regarding the construction
of the ventilation plant, carbon monoxide monitoring, and traffice counts.
Financial records show the initial costs associated with the project, such as estimates of
building materials and costs to purchase the land around the construction area from owners.
The workers on this project were also well documented through time sheets, with position
titles, salaries and employee disputes. Correspondence contains construction progress,
agreements, and exchanges between vendors. Contracts and work orders for different elements
of the construction of the tunnels are discoverable as well.
The collections contains early correspondence and business records kept by A.D. Neeld,
chief engineer of the Liberty Tunnels, along with engineering reference articles.
Drawings and blueprints used to build sections of the Liberty Tunnels and the ventilation
plant can be found in this collection. Blueprints from other projects can be found in this
collection as well.
The collection contains photographs documenting the build of Liberty Tunnels, and the
ventilation plant. Photographs from other tunnel or construction projects are present as
well and may have been used for reference.
Arrangement
The following collection has been arranged into series and subseries based on previous
processing and organization. Materials were added to the collection and inserted into the
series and subseries based on their nature.
Series I. Reports, Statistics and Payroll Subseries I. Daily Progress Subseries II. Monthly
Progress Subseries III. Contractor's Force Reports
Subseries IV. Tunnel Statistical Reports Subseries IV.Inspections and Tests Subseries VI.
Tunnel Construction Records Subseries VII. Checker's Reports in Traffic Counts
Series II. Business Records
Subseries I. Contractor's Payroll Labor Subseries II. Costs and Estimates Subseries III.
Correspondence Subseries IV. Contracts and Agreement Series IV. A.D. Neeld
Subseries I. Engineering Reference Materials Series V. Drawings and Blueprints
Series VI. Photographs
Biographical / Historical
The Liberty Tunnels are beneath Mt. Washington in Pittsburgh, Pennsylvania and provide a
gateway between the South Hills of Pittsburgh and the city. The construction of the Liberty
Tunnels in Pittsburgh marked a significant engineering feat in the city's history, aimed at
addressing the growing transportation needs for automobiles in the early 20th century. The
tunnels were one of the earliest vehicular tunnels in the Eastern United States projected to
alleviate traffic congestion and provide efficient passage between the South Hills and
downtown Pittsburgh.
The tunnels were designed by Almos D. Neeld, who also served as chief engineer after the
contract was awarded to Booth and Flinn, Ltd. Its groundbreaking in December 1919, was
another step towards Pittsburgh's urban development, showcasing commitment to innovation and
infrastructure expansion as industrial growth continued. Excavation continued through 1922
and the "Liberty Tubes" opened to traffic in 1924. Although open to the public, the tunnels
were not yet fully ventilated leading to an incident in May 1924 where several motorists and
passengers pass out from carbon monoxide. With guidance from the U.S. Bureau of Mines a
ventilation system and plant were built and completed in 1928. The Liberty Tunnels were
connected to the Liberty Bridge in 1928, further easing access to Downtown Pittsburgh.
The collection comes from the files of Chief Engineer, Almos D. Neeld, and presents a view
of tunnel construction from 1919 to 1923 and highlights the building of the ventilation
plant. Neeld kept many engineering resources regarding tunnels, concrete, steel, and sewers,
and he may have been inspired by other tunnels on the east coast.
Conditions Governing Access
Many materials in this collection are dirty and fragile. Please handle with care and
assistance will be given when necessary. To access the blueprints, please contact the
archivist at info@carnegielibrary.org.
Conditions Governing Use
This collection is open for research but may contain specific reproduction restrictions due
to copyright.
Custodial History
The collection comes from the files of Chief Engineer, Almos D. Neeld and his grandson,
Robert D. Neeld.
Preferred Citation
Liberty Tunnels Collection, 1890-1928, Archives, Carnegie Library of Pittsburgh.
Container List Reports, Statistics and Payroll , 1920-1924
Language English.
Daily Progress , 1920-1924
Language English.
Scope and Contents These reports kept track of the various functions at the construction site. The Daily
Progress Reports described the work completed for a particular day. The diaries
detailed the daily inspection of the work sites, weather conditions and issues that
were brought up, appear to be written by several different individuals. Most likely,
the authors of these journals were site supervisors on the project.
North and South End, typed , January
2 - April 29, 1922
Containers box 1 , folder 1 Language English.
North and South End, typed , May 1 -
September 30, 1922
Containers box 1 , folder 2 Language English.
North and South End, typed , October
2, 1922 - March 31, 1923
Containers box 1 , Item 3 Language English.
Ventilation Plant, typed , July 17
- November 30, 1923
Containers box 1 , folder 4 Language English.
Ventilation Plant, typed , December
1, 1923 - June 19, 1924
Containers box 1 , folder 5 Language English.
Liberty Shafts, typed , March
18, 1922 - February 28, 1923
Containers box 2 , folder 1 Language English.
Liberty Shafts, typed , March 01
- July 14, 1923
Containers box 2 , folder 2 Language English.
East and West Tunnel, typed , November
9, 1920 - January 31, 1921
Containers box 2 , folder 3 Language English.
East and West Tunnel, typed , February
1 - March 31, 1921
Containers box 2 , folder 4 Language English.
East and West Tunnel, typed , April 2
- November 8, 1923
Containers box 17 , folder 4 Language English.
Diary, Night Shift, South Approach , October
28 - December 31, 1920
Containers box 27 Language English.
Diary , 1921
Containers box 27 Language English.
Dairy , January
1 - October 1, 1921
Containers box 27 Language English.
Diary , 1922
Containers box 27 Language English.
Diary , 1922
Containers box 27 Language English.
Diary , 1922
Containers box 27 Language English.
Diary , January
1 - March 23, 1923
Containers box 27 Language English.
Diary , January
1 - October 8, 1923
Containers box 27 Language English.
Monthly Progress , 1921-1922
Language English.
Scope and Contents Monthly Progress Reports are summaries of the daily reports.
East and West Tunnel, typed , March 1921 -
August 1922
Containers box 2 , folder 5 Language English.
Contractor's Force Reports , 1920-1923
Language English.
Scope and Contents Contractor's Force Reports provide information on the number of employees hired for
each position and how much they received for their services. Each of the contractor's
reports in the North End were signed by one of these men: H.G. Straessley, W.E.
Fields, George D. Motsey or R.L. McFadden. In the South End, R.B. Hutton and W. T.
Grimm signed off on the Contractor's Force Reports.
North End, day and night shift , May 30 -
September 24, 1921
Containers box 2 , folder 6 Language English.
North End, day and night shift , October
2 - December 31, 1921
Containers box 3 , folder 1 Language English.
North End, day and night shift , January
1 - March 31, 1922
Containers box 3 , folder 2 Language English.
North End, day and night shift , April 1
- June 11, 1922
Containers box 3 , folder 3 Language English.
South End, day and night shift , September 4 - November 30, 1921
Containers box 4 , folder 1 Language English.
South End, day and night shift , December
31, 1921 - February 2, 1922
Containers box 4 , folder 2 Language English.
South End, day and night shift , March 1
- May 31, 1922
Containers box 4 , folder 3 Language English.
Labor expenditure charts , June 1920 -
April 1921
Containers box 4 , folder 5 Language English.
South Portal, day and night shift , October
1 - December 31, 1920
Containers box 9 , folder 7 Language English.
South Approach, day and night shift , June 10
- September 30, 1920
Containers box 9 , folder 8 Language English.
Shafts, day and night shift , July 10
- October 4, 1922
Containers box 3 , folder 4 Language English.
Shafts, day and night shift , October
5 - December 31, 1922
Containers box 3 , folder 5 Language English.
Shafts, day and night shift , January
1 - July 20, 1923
Containers box 3 , folder 6 Language English.
South End, day and night shift , June 1 -
August 31, 1922
Containers box 4 , folder 4 Language English.
South End, day and night shift , June 1 -
August 21, 1921
Containers box 10 , folder 2 Language English.
South End, day and night shift , March 31
- June 1, 1921
Containers box 10 , folder 3 Language English.
South End, day and night shift , January
1 - March 31, 1921
Containers box 10 , folder 4 Language English.
South End, day and night shift , December
21, 1922 - April 2, 1923
Containers box 14 , folder 3 Language English.
South End, day and night shift , September 1 - December 20, 1922
Containers box 14 , folder 4 Language English.
South End, day and night shift , April 3
- November 17, 1923
Containers box 15 , folder 1 Language English.
Tunnel Statistical Reports , 1920-1924
Language English.
Scope and Contents Tunnel Statistical Reports document the processes and measurements involved with
excavation, steel reinforcements and permanent lighting, among other things. Most of
these reports are on graph paper.
East and West Tunnel Excavation and Trench Excavation , 1920-1922
Containers box 4 , folder 6 Language English.
East and West Tunnel Concrete Curb and Footings , 1920-1922
Containers box 4 , folder 7 Language English.
East and West Tunnel Concrete Sidewalls , 1920-1922
Containers box 5 , folder 1 Language English.
East and West Tunnel Steel Reinforcement for Sidewalls and Footing,
Concrete Arch, Steel Reinforcement for Arch , 1921-1922
Containers box 5 , folder 2 Language English.
East and West Shaft, Construction, Excavation, Payroll , 1922-1923
Containers box 5 , folder 4 Language English.
East and West, Roadway Fill, Pipes, Concrete, Steel, Excavation , 1920-1922
Containers box 16 , folder 1 Language English.
East and West, Water Line, Electric, Ducts, Masonry, Cement,
Ventilation , 1920-1922
Containers box 16 , folder 2 Language English.
Storm Sewer, South End, Ventilation Shaft , 1922-1924
Containers box 17 , folder 5 Language English.
Inspections and Tests , 1920-1924
Language English.
Scope and Contents Inspections and Tests for concrete and excavation were signed by one of these men:
H.G. Straessley, W.E. Fields, George D. Motsey or R.L. McFadden. In the South End,
R.B. Hutton and W. T. Grimm signed off on the Contractor's Force Reports. These men in
charge of the filing and signing off on the Inspection forms for their respective
areas, which were designed to make sure that the structure was sound.
Concrete Tests, North and South End , September 1 - December 31, 1921
Containers box 5 , folder 5 Language English.
Concrete Tests, North and South End , November 1920
- October 1923
Containers box 5 , folder 6 Language English.
Inspection, Concrete, North End , September 14, 1921 - February 1, 1922
Containers box 5 , folder 7 Language English.
Inspection, Concrete, North End , June 16,
1921 - July 31, 1923
Containers box 5 , folder 8 Language English.
Inspection, Concrete, North End , August 7
- 10, 1922
Containers box 5 , folder 9 Language English.
Inspection, Concrete, South End , June 1 -
October 31, 1921
Containers box 6 , folder 1 Language English.
Inspection, Concrete, South End , December
4, 1920 - May 31, 1921
Containers box 6 , folder 2 Language English.
Inspection, Concrete, South End , November
1, 1921 - April 8, 1922
Containers box 6 , folder 3 Language English.
Inspection, Excavation, North End , December
21, 1921 - January 7, 1922
Containers box 6 , folder 4 Language English.
Inspection, Excavation, North End , March 2
- April 27, 1922
Containers box 6 , folder 5 Language English.
Inspection, Excavation, North End , April 28
- July 12, 1922
Containers box 6 , folder 6 Language English.
Inspection, Excavation, South End , April 10
- July 13, 1922
Containers box 6 , folder 7 Language English.
Inspection, Excavation, Shafts , July 10
- August 7, 1922
Containers box 6 , folder 8 Language English.
Inspection, Shaft , February
2 - July 14, 1924
Containers box 10 , folder 1 Language English.
Inspection, Excavation, South End , September 1 - December 26, 1921
Containers box 10 , folder 5 Language English.
Inspection, Excavation, South End , June 1 -
August 21, 1921
Containers box 10 , folder 6 Language English.
Inspection, Excavation, South End , December
27, 1921 - April 9, 1922
Containers box 11 , folder 1 Language English.
Inspection, Excavation, North End , May 31 -
August 3, 1921
Containers box 11 , folder 2 Language English.
Inspection, Excavation, North End , September 1 - December 20, 1921
Containers box 11 , folder 3 Language English.
Inspection, Excavation, South End , February
22 - May 31, 1921
Containers box 11 , folder 4 Language English.
Inspection, Material, South End , January
16 - July 30, 1921
Containers box 11 , folder 6 Language English.
Inspection, Material, South End , February
17 - August 24, 1922
Containers box 12 , folder 1 Language English.
Inspection, Material, South End , June 2,
1922 - July 5, 1923
Containers box 12 , folder 2 Language English.
Inspection, Material, North End , June 14,
1921 - March 29, 1922
Containers box 12 , folder 3 Language English.
Inspection, Material, North End , April 1,
1921 - February 23, 1923
Containers box 12 , folder 4 Language English.
Inspection, Shaft , December
16, 1922 - July 17, 1923
Containers box 13 , folder 1 Language English.
Inspection, Shaft , July 10
- December 16, 1922
Containers box 13 , folder 2 Language English.
Inspection, Concrete, South End , December
30, 1921 - April 9, 1922
Containers box 13 , folder 3 Language English.
Inspection, Concrete, South End , June 1 -
October 31, 1922
Containers box 13 , folder 4 Language English.
Inspection, Concrete, South End , January
18 - March 31, 1921
Containers box 13 , folder 5 Language English.
Inspection, Concrete, South End , December
16, 1922 - November 2, 1923
Containers box 14 , folder 1 Language English.
Inspection, Concrete, North and South End , April 10
- December 14, 1922
Containers box 14 , folder 2 Language English.
Ventilation Tests , May 11,
1922 - October 8, 1923
Containers box 15 , folder 4 Language English.
Inspection, Concrete, North and South End , April
11, 1922 - October 31, 1923
Containers box 15 , folder 5 Language English.
Concrete Tests , August
17, 1922 - May 24, 1923
Containers box 16 , folder 3 Language English.
Concrete Tests , November
9, 1920 - August 31, 1921
Containers box 16 , folder 4 Language English.
Concrete Tests , August
1, 1922 - October 31, 1923
Containers box 16 , folder 5 Language English.
Sand and Gravel Tests , September 1, 1921 - June 20, 1922
Containers box 17 , folder 1 Language English.
Tunnel Construction Records , 1920-1923
Language English.
Scope and Contents The Tunnel Construction Records deal with the installation of the items discussed in
the Tunnel Statistical Reports. Also, along with the tunnels, information about Saw
Mill Run Bridge is included because it was constructed as a part of the project.
Ventilating Plant , 1922
Containers box 5 , folder 3 Language English.
Cross Passages , March 1921 -
August 1922
Containers box 7 , folder 1 Language English.
Cement, Concrete Approaches, Lining, Roadway and Arches , March 1921 -
August 1922
Containers box 7 , folder 2 Language English.
Excavation, Heading Timbering, and Portal Walls , March 1921 -
August 1922
Containers box 7 , folder 3 Language English.
Reinforcement , December 1920
- June 1923
Containers box 7 , folder 4 Language English.
Saw Mill Run Bridge, Drains, Waterproofing, Sewer, Chemical Analysis, and
Curtain Walls , January 1921 -
July 1923
Containers box 7 , folder 5 Language English.
Footings, Side Walls, and Arch
Containers box 12 , folder 5 Language English.
Checker's Reports on Traffic Counts , 1924
Language English.
Scope and Contents Checker's reports show a daily tally record of passenger vehicles going through the
tunnel.
Traffic Counts , May 10,
1924 - August 15, 1924
Containers box 9 , folder 9 Language English.
Traffic Counts , March 1
- May 9, 1924
Containers box 15 , folder 2 Language English.
Traffic Counts , January
12 - February 29, 1924
Containers box 15 , folder 3 Language English.
Business Records , 1914-1926
Language English.
Scope and Contents The administrative and financial records of the Liberty Tunnel's construction detail
the project from the initial contract announcing it to contractors to the final work
orders placed in 1924. The materials include work orders, cost estimates from various
stages of the project and receipt books/expense accounts that span from 1914-1923.
Records of business contacts, in the form of business cards, also show the depth and
variety of people who may have been involved in an advisory role on the project.
Harry Lewis interview with Board of County Commission, two
sketches , 1922-02-09
Containers box 23 , folder 9 Language English.
Contractor's Payroll Labor , 1921-1923
Language English.
Analyzed Costs and Charges , October 1921 -
February 1922
Containers box 7 , folder 6 Language English.
Labor and Tunnel Construction , March -
December 1922
Containers box 7 , folder 7 Language English.
Tunnel Construction , January -
September 1923
Containers box 7 , folder 8 Language English.
Shaft Construction , July 1922 -
August 1923
Containers box 7 , folder 9 Language English.
Payroll Distribution, Tunnels and Distribution of Heading Gangs , May 1921 -
September 1923
Containers Oversized-Box 1 Language English.
Payroll Distribution, Shafts , October 1922 -
July 1923
Containers Oversized-Box 1 Language English.
Payroll Distribution, Ventilation Plant , July 1922 -
September 1923
Containers Oversized-Box 1 Language English.
Costs and Estimates , 1914-1926
Language English.
Force and Material Costs , January 1920 -
March 1922
Containers box 7 , folder 10 Language English.
Summaries of work, sketches, costs, and work orders , 1921-1924
Containers box 7 , folder 11 Language English.
Excavation and Steel Reinforcement costs , 1920-1922
Containers box 8 , folder 1 Language English.
Expenses for Ford Car, Engineering, Contractors Force and Time
Cards , 1919-1923
Containers box 8 , folder 2 Language English.
Receipt Book , 1914-1915
Containers box 8 , folder 3 Language English.
Receipt Book , 1917-1918
Containers box 8 , folder 4 Language English.
Receipt Book , 1920
Containers box 8 , folder 5 Language English.
Ledger , July 1919 -
December 1921
Containers box 8 , folder 6 Language English.
Booth and Flinn Ltd., Electrical Work Estimates , 1923-1924
Containers box 19 , folder 3 Language English.
Bayley Manufacturing Co., Fans and Connection Estimates , 1924
Containers box 19 , folder 4 Language English.
Sargent Engineering Co., Lamp posts , 1924
Containers box 19 , folder 5 Language English.
David Kalson, Utility room doors , 1924
Containers box 19 , folder 6 Language English.
Firefoam Sales Company, Fire extinguishers , 1924
Containers box 19 , folder 7 Language English.
The U.G.I. Contracting Co., Heating and Plumbing Estimates , 1924
Containers box 19 , folder 8 Language English.
Williams and Haas Company, Fan Houses and Stacks Estimates , 1924
Containers box 19 , folder 9 Language English.
Ledger , 1922-1924
Containers box 28 Language English.
Monthly Time Book , 1914-1923
Containers box 28 Language English.
Account Checkbook , 1919-1920
Containers box 23 , folder 12 Language English.
Employees Income Tax Records , 1921-1923
Containers box 24 , folder 3 Language English.
Receipts , 1922-1926
Containers box 24 , folder 9 Language English.
Correspondence , 1919-1926
Language English.
Regarding lighting , 1919-1921
Containers box 20 , folder 7 Language English.
Telegraph Ducts , 1920-1921
Containers box 20 , folder 8 Language English.
Office needs, Booth and Flinn , 1921
Containers box 24 , folder 4 Language English.
Telephone Service, Booth and Flinn , 1921
Containers box 24 , folder 5 Language English.
Ventilation Plant , 1926
Containers box 25 , folder 5 Language English.
Contracts and Agreements , 1919-1923
Language English.
Admittances to Tunnels , February
23, 1921 - May 21, 1923
Containers box 8 , folder 7 Language English.
Contract, Colonia Trust Co., Samuel Gamble , June 1920
Containers box 8 , folder 8 Language English.
Proposal, Agreement, and Information regarding lots around proposed Liberty
Tunnel location
Containers box 8 , folder 9 Language English.
Business Cards
Containers box 8 , folder 10 Language English.
Contract Plans and Specifications, Liberty Tunnel, Allegheny
County , 1919
Containers box 28 Language English.
Contract for Construction of the Liberty Tunnel
Containers box 18 , folder 11 Language English.
Contract for Construction and Installation of Electric Power and Lighting
Equipment
Containers box 20 , folder 9 Language English.
Portion of electrical contract
Containers box 20 , folder 19 Language English.
Liberty Tunnels Contract, Extra Work Order No. 1, Protection of Slope over
South End of East and West Tunnels , 1920-1923
Containers box 22 , folder 11 Language English.
Liberty Tunnels Contract, Extra Work Order No. 2, Extending the sidewalls
of the tunnels... , 1921-1923
Containers box 22 , folder 12 Language English.
Liberty Tunnels Contract, Extra Work Order No. 3, Change and omission of
T.C. Ducts in tunnels , 1921-1923
Containers box 22 , folder 13 Language English.
Liberty Tunnels Contract, Extra Work Order No. 4, Construction of
Passageways , 1921-1923
Containers box 22 , folder 14 Language English.
Liberty Tunnels Contract, Extra Work Order No. 5, Omission of 15th T.C.
Sewers , 1922-1923
Containers box 22 , folder 15 Language English.
Liberty Tunnels Contract, Extra Work Order No. 6, Construction of enlarged
section for nozzles and curtain wall for air ducts , 1921-1923
Containers box 22 , folder 16 Language English.
Liberty Tunnels Contract, Extra Work Order No. 7, Construction of Two Air
Shafts for Ventilating Plant , 1922-1923
Containers box 22 , folder 17 Language English.
Liberty Tunnels Contract, Extra Work Order No. 8, Omission of Street
Railway Tracks , 1922-1923
Containers box 22 , folder 18 Language English.
Liberty Tunnels Contract, Extra Work Order No. 9, Additional cost for
changing roadway from brick , 1922-1923
Containers box 22 , folder 19 Language English.
Liberty Tunnels Contract, Extra Work Order No. 10, Changing Roadway in
Approaches , 1922-1923
Containers box 22 , folder 20 Language English.
Liberty Tunnels Contract, Extra Work Order No. 11, Reconstruction of
reinforced concrete sewer, South End , 1922-1923
Containers box 23 , folder 1 Language English.
Liberty Tunnels Contract, Extra Work Order No. 12, Grouting retaining
walls , 1922-1923
Containers box 23 , folder 2 Language English.
Liberty Tunnels Contract, Extra Work Order No. 13, Excavation for roadway
connecting Brownsville Avenue and North End , 1923
Containers box 23 , folder 3 Language English.
Liberty Tunnels Contract, Extra Work Order No. 14, Construction of roadway
from Brownsville Avenue , 1923
Containers box 23 , folder 4 Language English.
Liberty Tunnels Contract, Extra Work Order No. 15, Construction of
Retaining Walls, Steps, Etc. , 1923
Containers box 23 , folder 5 Language English.
Liberty Tunnels Contract, Extra Work Order No. 16, Miscellaneous Work
necessary to complete tunnels , 1923
Containers box 23 , folder 6 Language English.
Liberty Tunnels Contract, Extra Work Order No. 17, Elimination of Bell
Mouth at North End , 1923
Containers box 23 , folder 7 Language English.
Contract for Construction of Fan Houses and Stacks also Heating and
Plumbing for Same, Liberty Tunnels
Containers box 24 , folder 11 Language English.
A.D. Neeld , 1890-1925
Language English.
Content Warning
Users are warned that there may be words, descriptions, and images which may be
culturally sensitive, and which might not normally be used in certain public or
community contexts. Terms and annotations which reflect the creator's attitude or that
of the period in which the item was written may be considered inappropriate today in
some circumstances.
Scope and Contents A.D. Neeld, the chief engineer, had several other projects prior to the Liberty
Tunnels. This series contains records of projects and business from 1890 to 1925. Neeld
kept many engineering resources regarding tunnels, concrete, steel, and sewers, and
other elements of construction. Also included is a typed letter from Robert D. Neeld
that gives insight to his grandfather's passion and dedication to the project.
Biographical / Historical
Almos Davidson Neeld was born in 1858 in West Liberty borough, a neighborhood in modern
day Brookline. He was the youngest University of Pittsburgh Engineering school graduate
in 1875 at 17. He found difficulty finding work within his field due to his young age,
which led him to work as a shipping clerk for several years before being hired by
Pittsburgh and Western Railroad in 1881. He worked there as a construction engineer
until 1885. He began his engineering career as an assistant engineer for maintenance and
construction at Pennsylvania and Lake Erie Railroad. There, he surveyed proposed
railways from Pittsburgh to Punxatawney.
In 1899, Neeld partnered with J.W. Patterson to create the engineering firm Patterson
and Neeld. As a consulting engineer, he encountered and oversaw various engineering
challenges including creating a location for a railroad line on behalf of the Baltimore
and Ohio Railroad, connecting Fairport on Lake Erie to Warren, Ohio. He also surveyed
the location of the Wabash Railroad from Pittsburgh to Wheeling, West Virginia, to Lake
Erie in Ohio.
Neeld completed many projects around Pittsburgh before starting work on the Liberty
Tunnels in 1919. The key obstacle of this project was the ventilation system. While
Neeld's designs were progressive, he had voiced his opinion that the systems required
more testing. The premature opening of the tunnels resulted in injury. Neeld's approach
and attention to detail were successful, however, when clearing the tunnel. He
instructed his field engineers to do the survey lines back and forth across Mt.
Washington so they "were on a first name basis with every rock and cranny of the old
mountain." This diligent approach led to the tunnels being only one quarter-inch off
from their original plans.
Map, County of Allegheny, Pittsburgh, Pa, Road Department , January 1923
Containers box 8 , folder 11 Language English.
photocopied, newspaper clippings , 1920-1924
Containers box 9 , folder 2 Language English.
Early Correspondence , 1895-1915
Containers box 9 , folder 4 Language English.
Receipts, Hopper, McGaw and Co., Importing Grocers and Wine
Merchants , 1893
Containers box 9 , folder 5 Language English.
"Memories of My Grandfather," Robert D. Neeld
Containers box 9 , folder 6 Language English.
Sample for Liberty Tunnel Contract , November 4, 1919
Containers box 11 , folder 5 Language English.
"Iron Bridges" statistics
Containers box 12 , folder 6 Language English.
Weekly Time Book , December
13, 1890 - April 13, 1891
Containers box 12 , folder 7 Language English.
Drawings and Calculations
Containers box 18 , folder 3 Language English.
Letters, bound , January 1,
1903 - February 2, 1905
Containers box 28 Language English.
Correspondence and receipts for a copy of the Plans and Specifications of
County Highway Tunnel No. 1 , 1915
Containers box 21 , folder 2 Language English.
Investment Information , 1912-1916
Containers box 21 , folder 3 Language English.
Statistics and Drawings of Subway Tunnel , 1921
Containers box 21 , folder 4 Language English.
Blank contract from Pittsburg, Toledo and Western Railroad
Company
Containers box 21 , folder 8 Language English.
"The Kaiser's Prayer"
Containers box 21 , folder 10 Language English.
Draft Specifications
Containers box 22 , folder 1 Language English.
Draft Specifications
Containers box 22 , folder 2 Language English.
Draft Specifications
Containers box 22 , folder 3 Language English.
Bill of Lumber for Try Street Dumping Platform , 1912
Containers box 22 , folder 4 Language English.
North Side District flood improvement , 1911
Containers box 22 , folder 5 Language English.
Property and Excavation correspondence and information , 1911-1913
Containers box 22 , folder 6 Language English.
Engineers' Commission, Commonwealth of PA, Draft of bill
provisions
Containers box 22 , folder 7 Language English.
From a lecture by Dr. James Hyde, Jefferson Medical College, PA , June 26, 1897
Containers box 22 , folder 8 Language English.
Notes and calculations for highway bridge
Containers box 22 , folder 9 Language English.
Supported Floor for Steel Storage, handwritten , September 30,
1914
Containers box 22 , folder 10 Language English.
Churchill, Ventilation County Highway Tunnel No. 1 correspondence , 1916
Containers box 23 , folder 8 Language English.
Standards of Street and Sewer Construction, Department of Public Works, City
of Pittsburgh , 1911
Containers box 23 , folder 11 Language English.
Contract, Portion of City Tunnel of Catskill Aqueduct, NYC
Containers box 23 , folder 14 Language English.
Allen Coal , 1902
Containers box 23 , folder 15 Language English.
Vesta Coal Company , 1916-1917
Containers box 24 , folder 7 Language English.
Esperanta writings
Containers box 24 , folder 8 Language English.
Contract for Construction of Highways, Department of Public Works, Allegheny
County , 1925
Containers box 24 , folder 10 Language English.
Stowe Township Tunnel , May 5, 1909
Containers box 24 , folder 12 Language English.
Ewing and Long
Containers box 25 , folder 2 Language English.
Correspondence, Society membership and certification , 1916-1922
Containers box 25 , folder 4 Language English.
Calculations
Containers Oversized-Box 1 , folder 1 Blueprints , 1901-1919
Letting and Widening Plan, Ardmore Boulevard (Wilkinsburg Boro Line),
Allegheny County Road Dept., 261, 46"x21" , August 1, 1919
Containers Oversized-Folder 7 Language English.
Plan of property of Jones and Laughlin Steel Co., First Ward, Pittsburgh,
John R. Romine, C.E., 38"x34.5" , February 14,
1913
Containers Oversized-Folder 7 Language English.
Sketch illustrating method of attaching D.B.M. Hangers, B.S. Barnard and
Co., 21"x14" , June 2, 1915
Containers Oversized-Folder 7 Language English.
Porcelain Saddle Block No. 1, Mfgs. of underground conduit tools and
specialties, 11"x18" , June 2, 1915
Containers Oversized-Folder 7 Plan showing coal land of James Evans, Trustee in Clinton District,
Monongalia Co., WV, 37"x22"
Containers Oversized-Folder 7 Language English.
North River Highway Tunnel from 12th and Provost Streets, Jersey City to
Canal and Venice Streets, NY, photostat, 18"x13" , November 24,
1917
Containers Oversized-Folder 7 Language English.
"Mine car design", Phillips Mine Supply Co., 16"x23" , November 13,
1899
Containers Oversized-Folder 7 Language English.
Plan of proposed Clairton Branch, Monongahela Southern R.R. Co., photostat,
29"x9.5" , July 20, 1917
Containers Oversized-Folder 7 Language English.
Coke Oven locations for Elkins Coal and Coke Co., Clinton Coke Co., Elkins
Coke Co., United Coal, Co., Topographic map of Morgantown and Blacksville
Quadrangles, 29"x19" , c1905
Containers Oversized-Folder 7 Language English.
Profile of line for Bridge and Tunnel from Forbes St. at Shingiss St. to
Warrington Ave. at Haberman Ave., 10, 42"x22" , August 1901
Containers Oversized-Folder 7 Language English.
Tank Yard Pump House, Piping Details, Astoria Plant, 1202-3, Robinson
Butler Hemingway and Co., 24"x36" , January 5,
1928
Containers Oversized-Folder 7 Language English.
Plan of discharge lines, Cycloidal Pumps, 17.5"x13.5"
Containers Oversized-Folder 7 Distribution of flow of gas, Dayton, Columbus, Springfield, Salt Creek
Pumping Station, Raccoon Pumping Station, 23"x18"
Containers Oversized-Folder 7 Language English.
Scope and Contents "Note: no allowance of leakage in these figures"
Distribution of low of gas, Sugar grove, Canal-Winchester, Mt. Sterling,
Springfield, Raccoon Creek..., 23"x18"
Containers Oversized-Folder 7 Diagram for computing capacity of oil pipelines under pressure and
horsepower required using above formula, J.W. Hershey, C.E., 22"x22" , January 1919
Containers Oversized-Folder 7 Language English.
Engineering Reference Materials , 1908-1922
Language English.
Standard Specification of the American Institute of Steel Construction for
the Design, Fabrication, and Erection of Structural Steel for Buildings , June 1, 1923
Containers box 9 , folder 3 Language English.
Pipe Lines, Floors-Ceilings, Automobiles, Military
Containers box 17 , folder 2 Language English.
Highways
Containers box 17 , folder 6 Language English.
Tunnels
Containers box 17 , folder 7 Language English.
Concrete
Containers box 18 , folder 1 Language English.
Concrete
Containers box 18 , folder 2 Language English.
Structural Iron, Sewers, Railroads, Water Ways
Containers box 18 , folder 4 Language English.
Buildings
Containers box 18 , folder 5 Language English.
Bridges
Containers box 18 , folder 6 Language English.
Concrete
Containers box 19 , folder 1 Language English.
Concrete
Containers box 19 , folder 2 Language English.
Investigation of CO, Gas, Bureau of Mines
Containers box 19 , folder 10 Language English.
Investigation of CO, Gas, Bureau of Mines
Containers box 20 , folder 1 Language English.
Tunnel Gas Investigation, Bureau of Mines , February 26,
1920
Containers box 20 , folder 6 Language English.
"The Manhattan Crosstown Tunnels of the Pennsylvania Railroad," The United
Engineering and Contracting Company , 1908
Containers box 18 , folder 7 Language English.
"The Mount Royal Tunnel," The Canadian Northern Railway , December 1913
Containers box 18 , folder 8 Language English.
Bridge Specifications, Road Department, Allegheny County
Containers box 18 , folder 9 Language English.
"The Transaction of Business" by Arthur Helps; "How to Win Fortune" by
Andrew Carnegie
Containers box 28 Language English.
Souvenir of the Banquet given to William Flinn , May 26, 1921
Containers box 18 , folder 10 Language English.
Hudson River Vehicular Tunnel Contract No. 1 , 1920
Containers box 28 Language English.
Bayley Plexiform Fan, Bayley Manufacturing Co. , 1922
Containers box 28 Language English.
Blank Contract and Specifications for Construction of a road, County of
Allegheny, PA
Containers box 21 , folder 1 Language English.
Automobiles and Transportation
Containers box 21 , folder 2 Language English.
"Specifications for Concrete Tunnel Lining," Wabash-Pittsburgh Terminal
Railway Co."
Containers box 21 , folder 5 Language English.
"Specifications for McIntire School Building, Zanesville, O.," C.E. Handshy
and H.C. Meyer, Architects , 1913
Containers box 21 , folder 6 Language English.
Concrete, Construction , 1918
Containers box 21 , folder 7 Language English.
Concrete, Sewers
Containers box 21 , folder 9 Language English.
General
Containers box 23 , folder 13 Language English.
Valuations and Taxes
Containers box 24 , folder 1 Language English.
Buildings
Containers box 24 , folder 6 Language English.
General Analysis Calculations
Containers box 25 , folder 1 Language English.
Strip Mining
Containers box 25 , folder 3 Language English.
Item CLP-LTC-066 Pennsylvania Railroad Company, Entrance to North River Tunnels, Bergen
Hill, NJ
Containers box 26 Language English.
Item CLP-LTC-067 photograph on blueprint paper of child standing on a chair
outdoors
Containers box 26 Language English.
Item CLP-LTC-068 #24 gauge metal lath plain ceiling, tied up against bottom of Concrete
Joists, Race Apartment Bldg., Chicago, Ill. , November 16,
1916
Containers box 26 Language English.
Item CLP-LTC-069 Race Apartment and Theater Bldg., Chicago, Ill., Architect, Robert W.
Layer, Contractors, Jensen and Steenhill , September 25,
1916
Containers box 26 Language English.
Item CLP-LTC-070 Berger's Pressed Steel Cores with suspended lath ceiling in Race Apartment
Bldg., Chicago, Ill. , November 16,
1916
Containers box 26 Language English.
Item CLP-LTC-071 Showing 10" #22 gauge Cores after one removal, Illinois Central Office
Bldg., Chicago , January 22,
1917
Containers box 26 Language English.
Item CLP-LTC-072 Showing 10" #22 gauge Cores after one removal, Illinois Central Office
Bldg, Chicago , January 22,
1917
Containers box 26 Language English.
Item CLP-LTC-073 Pressed Steel Cores Installed, Book Bldg., Detroit, Mich., 6th
floor , September 23,
1916
Containers box 26 Language English.
Item CLP-LTC-074 Concrete Joist ceiling exposed after removal of cores, Race Apartment
Bldg., Chicago, Ill , November 16,
1916
Containers box 26 Language English.
Item CLP-LTC-075 Berger's Pressed Steel Cores Installed, Book Bldg., Detroit,
Mich.
Containers box 26 Language English.
Item CLP-LTC-076 Alta Cons'd High School, Alta, Ia.
Containers box 26 Language English.
Item CLP-LTC-077 Showing ceiling after removal of cores, with hangers for suspended ceiling,
Illinois Central Office Bldg., Chicago , January 22,
1916
Containers box 26 Language English.
Item CLP-LTC-078 Shoreview Apartments, Chicago, Ill.
Containers box 26 Language English.
Item CLP-LTC-079 Meyer Theatre, Chicago, Ill.
Containers box 26 Language English.
Item CLP-LTC-080 Installation of "Kahn" Cores, Barnett Memorial Hospital, Paterson,
NJ
Containers box 26 Language English.
Item CLP-LTC-081 Junius Hotel, Chicago, Ill. , September,
1916
Containers box 26 Language English.
Item CLP-LTC-082 Junius Hotel, Chicago, Ill.
Containers box 26 Language English.
Item CLP-LTC-083 View of joists, Peoria High School, Peoria, Ill.
Containers box 26 Language English.
Drawings and Blueprints , 1899-1928
Language English.
Scope and Contents Drawing and Blueprints contain plan showing the elements of creating the many elements
and sections of the Liberty Tunnels and its ventilation plant. Plan for ventilation fans
are present. Drawings and blueprints for other tunnels can be found in this series as
well.
Conditions Governing Access
Please contact archivist with your request at info@carnegielibrary.org.
Diagrams and Drawings
Containers box 9 , folder 1 Language English.
Ventilating Fans General Plan, Liberty Tunnels, Allegheny County,
PA , October 1, 1922
Containers Oversized-Box 1 Language English.
Drawings, North Portal Concrete
Containers box 17 , folder 3 Language English.
Roof Supports for Liberty Tunnel , 1921
Containers box 20 , folder 2 Language English.
The Halby Shoveling Machine
Containers box 20 , folder 3 Language English.
Area of Principal Illinois Coal Seams , 1908
Containers box 20 , folder 4 Language English.
Plot showing property of C.C. McClintock, 4th ward, Pittsburgh
Containers box 20 , folder 5 Language English.
Bergers Pressed Steel Cores, statistics
Containers box 20 , folder 10 Language English.
Concrete Slab and Girder drawings and calculations
Containers box 20 , folder 11 Language English.
New Sections, The Berger Manufacturing Co. , 1919
Containers box 20 , folder 12 Language English.
Area of Steel Required per ft of width for a maximum resisting moment of slab
or given thickness, statistics
Containers box 20 , folder 13 Language English.
Drawings and statistic tables for concrete, steel tiles, and
slabs
Containers box 20 , folder 14 Language English.
Blueprints showing buildings and machinery for ventilation plant
Containers box 20 , folder 16 Language English.
I-Joist Weights per square foot , June 6, 1919
Containers box 20 , folder 17 Language English.
Drawings and correspondence for Roof Supports, Liberty Tunnel,
McClintic-Marshall Construction Co. , June 22, 1921
Containers box 20 , folder 18 Language English.
Unbound blueprints and sketches of Liberty Tunnel blueprints and
sketches , 1919-1922
Containers box 23 , folder 10 Language English.
Westinghouse Electric and Mfg. Co. for Booth and Finn
Four Series Lighting Panels (Liberty Tunnel Substation) Description and
Material, P2750, 20"x24" , May 9, 1924
Containers Oversized-Folder 1 Language English.
SWBD-4 Panel Front Elevation-Rotary A.C. End, P2751, 20"x24" , June 20, 1924
Containers Oversized-Folder 1 Language English.
SWBD-4 Panel Rear Elevation-Rotary A.C. End, P2752, 20"x24" , January 17,
1924
Containers Oversized-Folder 1 Language English.
7 Panel Front and End Elevation-A.C. Distributing SWBD, P2573,
20"x24" , February 29,
1924
Containers Oversized-Folder 1 Language English.
7 Panel Rear Elevation-A.C. Distributing SWBD, P2574, 20"x24" , March 4, 1924
Containers Oversized-Folder 1 Language English.
SWBD-7 Panel WIR Diagram, P2575, 20"x24" , September 22,
1923
Containers Oversized-Folder 1 Language English.
SWBD-4 Panel Front Elevation and WIR Diagram, P2576, 20"x24" , November 30,
1923
Containers Oversized-Folder 1 Language English.
SWBD-4 Panels Rear View and End View D.C. End of Rotary Panels, P2577,
20"x24" , January 17,
1924
Containers Oversized-Folder 1 Language English.
SWBD- 4 Panel Front Elevation and Rear View-Bill of Material, P2578,
20"x24" , November 30,
1923
Containers Oversized-Folder 1 Language English.
SWBD-4 Panel WIR Diagram, P2579, 20"x24" , November 30,
1923
Containers Oversized-Folder 1 Language English.
SWBD-1 Panel, P2583, 20"x24" , June 3, 1924
Containers Oversized-Folder 1 Language English.
D.C. Rotary and Distribution Switchboard Assembly-Bill of Material, P2639,
20"x24" , January 18,
1924
Containers Oversized-Folder 1 Language English.
County Highway Tunnel No. 1, Pittsburgh, PA , 1915
Arrangement of Ventilating Device for County Highway Tunnel No. 1,
Allegheny County, C.S. Churchill, 26"x42"
Containers Oversized-Folder 2 Language English.
Proposed Tunnel Section, Type B, copy 1, 36"x23" , April 15, 1915
Containers Oversized-Folder 2 Language English.
Proposed Tunnel Section, Type B, copy 2, 36"x23" , April 15, 1915
Containers Oversized-Folder 2 Language English.
Masonry for Tunnel and Approaches, copy 1, 21"x33" , June 2, 1915
Containers Oversized-Folder 2 Language English.
Masonry for Tunnel and Approaches, copy 2, 21"x33" , June 2, 1915
Containers Oversized-Folder 2 Language English.
Masonry for Tunnel and Approaches, copy 3, 21"x33" , June 2, 1915
Containers Oversized-Folder 2 Language English.
Masonry for Tunnel and Approaches, copy 4, 21"x33" , June 2, 1915
Containers Oversized-Folder 2 Language English.
Mt. Washington Highway Tunnel No. 1, Exhibit "c"-standard section,
35"x20"
Containers Oversized-Folder 2 Language English.
Longitudinal section of completed tunnel showing different steps in
construction-Pilot Tunnel, 36"x25" , June 30, 1915
Containers Oversized-Folder 2 Language English.
County Highway Tunnel No. 1, Pittsburgh, PA, Early Plans , 1915
Containers box 20 , folder 15 Language English.
Liberty Tunnel Blueprints - Passageways , 1921
Sketch of Liberty Tunnel entrance, 14"x30"
Containers Oversized-Folder 3 Language English.
Passageway Between Tunnels, 26"x37.5" , April 1921
Containers Oversized-Folder 3 Language English.
Passageway between Tunnels, 26"x37.5" , April 1921
Containers Oversized-Folder 3 Language English.
Liberty Tunnel Blueprint - Retaining Walls and Portals , 1922
South Portal and Approach, 30.5"x41.5" , August 1922
Containers Oversized-Folder 3 Language English.
Scope and Contents Plan showing water pipe; terra cotta drain pipe; 3" fibre conduits; terra cotta
ducts; manhole boxes and covers.
North Portal and Retaining Walls, 30.5"x42" , June 1922
Containers Oversized-Folder 3 Language English.
Scope and Contents Sections 4 and 39; 5 and 10; 4 and 36; DD
Liberty Tunnel Blueprints - Plots , 1919-1921
Plot showing location of 10' Elliptical Sewer, 26"x37.5" , August 1921
Containers Oversized-Folder 3 Language English.
Scope and Contents Showing location of 10 foot Elliptical Sewer at the intersection of Warrington
Avenue and West Liberty Avenue.
Plots at Secane Ave. and Caldena Alley and Shannon Alley and Ruth Street,
13.5"x15"
Containers Oversized-Folder 3 Language English.
Scope and Contents Showing Calenda Alley; Shannon Alley; Ruth Street; Secane Avenue and properties
with landowner names.
Plan showing properties at South Approach, 24"x36.5" , December 1919
Containers Oversized-Folder 3 Language English.
Liberty Tunnel Blueprints - Lighting , 1921-1923
Sketch Showing Location of Lights, Conduits and Junction Boxes (East and
West Tunnels), 30"x39.5"
Containers Oversized-Folder 3 Language English.
Lamp posts, Electric Railway Equipment Co. (Cincinnati, OH), Design No.
10814X, Design A and B, 15"x28" , 1921-12-03
Containers Oversized-Folder 3 Language English.
Alternate Lamps, The Electric Railway Equipment Co. (Cincinnati, OH),
Design No. 10920-X, 15"x28" , April 19, 1923
Containers Oversized-Folder 3 Language English.
Scope and Contents Alternate lamps being connected to different circuits allows one half of the Units
to be extinguished at midnight.
Liberty Tunnel Blueprints - Sewer , 1922
Location and Details of New 10 foot Concrete Sewer, South
Approach , April 1922
Containers Oversized-Folder 3 Language English.
Liberty Tunnel Blueprints - Concrete Bridge , 1919
Reinforced concrete bridge over Saw Mill Run, Liberty Tunnels, Sheet No. 5,
24"x36" , November 1919
Containers Oversized-Folder 3 Language English.
Liberty Tunnel Blueprints - Roadway Construction , 1922
Roadway Construction , March 1922
Containers Oversized-Folder 3 Language English.
Scope and Contents This plan is part of extra work order number 9.
Liberty Tunnel Blueprints - Doors
Steel Doors, 1222-4, Builders Steel Works Co., Booth and Flinn Contractors,
14"x22"
Containers Oversized-Folder 3 Language English.
Liberty Tunnel Blueprints - Ventilation , 1920-1923
Plan of Ventilation for Liberty Tunnels, (Elev. Fan House; Longitudinal
Section Thro. Center of Nozzle, etc.)-signed by Charles S. Churchill, 65.5"x24"
(2) , January 1920
Containers Oversized-Folder 4 Language English.
32" Type "H" Clutch for Bayley Mfg. Co. Assembly, 626-334-L, The
Cutler-Hammer Mfg. Co., Magnet and Clutch Dept., 18"x24" , August 24,
1923
Containers Oversized-Folder 4 Language English.
36" Type H Clutch for Bayley Mfg. Co. Assembly, 626-329-L, The
Cutler-Hammer Mfg. Co., Magnet and Clutch Dept., 18"x24" , July 20, 1923
Containers Oversized-Folder 4 Language English.
Letter to A.D. Neeld (Enclosing drawings #636-334L and #636-355L-clutches
for fans being furnished) , August 27,
1923
Containers Oversized-Folder 4 Physical Location In a mylar sleeve stored in an
envelope adhered to inside of folder board with blueprints.
36" Type "H" Clutch, Bayley Mfg. Co. Assembly, 626-335-L, The Cutler-Hammer
Mfg. Co., Magnet and Clutch Dept., 18"x24" , August 24,
1923
Containers Oversized-Folder 4 Language English.
Detail of 139" Sirocco Mine Fan-Reversible for Union Coal and Coke Co.,
Marianna, PA-Bill of Materials, K-4805, American Blower Co., 24"x36" , November 11,
1920
Containers Oversized-Folder 4 Language English.
8" Chain Oiling Bearing, Liberty Tunnels-Allegheny County, PA-Bill of
Materials, C470-1, Bayley Mfg. Co., 24"x36" , July 17, 1923
Containers Oversized-Folder 4 Language English.
Bearing and Hub Details, Liberty Tunnels, Allegheny County, PA-Bill of
Materials, C470-2, Bayley Mfg. Co., 24"x36" , July 24, 1923
Containers Oversized-Folder 4 Language English.
Sub-Base and Pedestal Details, Liberty Tunnels, Allegheny County, PA-Bill
of Materials, C470-3, Bayley Mfg. Co., 24"x36" , July 23, 1923
Containers Oversized-Folder 4 Language English.
Shaft and Pulley Hub Details, Liberty Tunnels, Allegheny County, PA-Bill of
Materials, C470-4, Bayley Mfg. Co., 24"x36" , July 27, 1923
Containers Oversized-Folder 4 Language English.
Supply Fan Unit, Liberty Tunnels, Allegheny County, PA-Bill of Materials,
C470-5, Bayley Mfg. Co., 24"x36" , August 21,
1923
Containers Oversized-Folder 4 Language English.
Exhaust Fan Unit, Liberty Tunnels, Allegheny County, PA-Bill of Materials,
Bayley Mfg. Co, C470-6, Bayley Mfg. Co., 24"x36" , August 23,
1923
Containers Oversized-Folder 4 Language English.
Fan Connections to Air Shaft for East Supply Fan, Shaft No. 1, (Discharge
Connection for Fan #5)-Bill of Materials, C470-7, Bayley Mfg. Co.,
24"x36" , October 20,
1923
Containers Oversized-Folder 4 Language English.
Fan Connections to Air Shaft for West Supply Fan, Shaft No. 1, (Discharge
Connection for Fan #4)-Bill of Materials, C470-8, Bayley Mfg. Co.,
24"x36" , October 22,
1923
Containers Oversized-Folder 4 Language English.
Fan House and Stacks, Roof Framing Plan, #3, William and Haas Co.
Contractors F.B. Herendeen, 22"x29" , July 1923
Containers Oversized-Folder 4 Language English.
Fan House and Stacks, Details of Reinforcement Bars, #2, William and Haas
Co., Contractors F.B. Herendeen, 22"x29" , July 14, 1923
Containers Oversized-Folder 4 Ventilating Fans, General Plan 1, 29"x38" (2) , October 1,
1922
Containers Oversized-Folder 4 Language English.
Scope and Contents Supply Fan Switch Panel, Exhaust Fan Switch Panel, Detail of Conduit Run for
Distribution Panel to Fan Room #2.
Coal chute, Fan House, Builders Steel Works, Co., #1250,
14.5"x15.5" , July 20, 1923
Containers Oversized-Folder 4 Language English.
Fan House and Stacks, #1, William and Haas Co. Contractors F.B. Herendeen,
19.5"x15.5" , July 7, 1923
Containers Oversized-Folder 4 Details of Main Entrance Doors, Fan House (Secane and Ruth Sts.),
17"x22"
Containers Oversized-Folder 4 Language English.
Scope and Contents A.D. Neeld, Engineer; Stanley L. Roush, Reg. Architect
Sketch showing arrangement of ventilation system, 18.5"x21.5"
Containers Oversized-Folder 4 Language English.
Radial Brick and Concrete Chimney 110'-0" x 12'-0", CB-4368-0, The Rust
Engineering Co., Pittsburgh, 18"x24" , November 10,
1921
Containers Oversized-Folder 4 Language English.
Plan of Ventilating Shafts, Plan of Shaft #1, #2, Section A-B and C-D,
Bottom of Shaft, Adopted by the County Commissioners of Allegheny County, PA,
27"x28" , October 21,
1921
Containers Oversized-Folder 4 Steel Sets for East Tube and West Tube, 18"x37.5"
Containers Oversized-Folder 4 Language English.
Ventilating Shaft Location Plan, Sheet No. 1, 30"x39" , September 1921
Containers Oversized-Folder 4 Language English.
Ventilating Sheet No. 3, 30"x39"
Containers Oversized-Folder 4 Language English.
Scope and Contents Sectional Elevation "C-D"; Sections "L-G" Showing Resources for Air Duct
Connection; Section U-V pipes, conduit- bottom of shaft, junction boxes; Section G-H
Curve for Exhaust Air Duct; Sections R-S Opening s or Supply Air Ducts; Sections K-L
Exhaust Air Duct; Sections MN and OP -Supply Air Duct; Sections E-F Cross Beams and
Concrete Hitches.
Supply Fan Unit, Bayley Mfg. Co., 24"x35.5" , August 21,
1923
Containers Oversized-Folder 4 Language English.
Liberty Tunnel Blueprints - Cross Section Details , 1922
Profile of Sewer, 18"x23"
Containers Oversized-Folder 5 Scope and Contents Scales: Ver. 1"=1'-0"; Horiz.1"=1'-0"
North Portal, East Side Wall Fluid Pressure at 30# cu. ft.,
18"x23"
Containers Oversized-Folder 5 Overturning Moments, Sect. 23.02'; Sect. on CL, 18"x23" , April 20, 1922,
REN
Containers Oversized-Folder 5 PLAN of Sect. 23.02' East of CL East Tunnel; Sect. on CL between tunnels;
Sect. 23.02' West of CL West tunnel, 18"x23" , April 19, 1922,
REN
Containers Oversized-Folder 5 PLAN of East (Entire Wall Surcharged); West (Entire Wall Surcharged),
18"x23" , April 18, 1922,
REN
Containers Oversized-Folder 5 Scope and Contents "Note: Average of 28 cu. yds/ft. w overturning moment"
PLAN, 18"x23" , April 13, 1922,
REN
Containers Oversized-Folder 5 Scope and Contents "Note: No pressure counted below 'Top of Shale'; Moments at outer edge of 'Middle
Third'"
Moments at outer edge middle third 29.3 cu. yds/ft. P=19.1# (12 feet),
18"x23" , April 12, 1922,
REN
Containers Oversized-Folder 5 Scope and Contents "Note: Both these sections 23.02' West of CL West Tunnel (10 feet) 24.0 cu. yds/ft.
P=15.2# Total Overtuning Moment 587,568"
Red Outline 24.0 cu yds/ft P=20#; Orange Outline 26.3 cu yds/ft P=19.3#;
Green Outline 19.6 cu. yds/ft P=12.7#; Black Outline 16.2 cu yds/ft P=10#,
18"x23" , April 20, 1922,
REN
Containers Oversized-Folder 5 North Portal, 18"x23" , April 10, 1922,
REN
Containers Oversized-Folder 5 Water pressure on Entire Wall, 18"x23" , April 10, 1922,
REN
Containers Oversized-Folder 5 Section 23.02' West of CL of West Tube (North Portal), 18"x23"
Containers Oversized-Folder 5 Top Sandstone and Shale, 18"x23"
Containers Oversized-Folder 5 West Wall, North Portal (5 faces of wall), 18"x23"
Containers Oversized-Folder 5 Slope sketch, 18"x23"
Containers Oversized-Folder 5 Sect. B + 22-1/2 East 23 CL East Tube, 18"x23"
Containers Oversized-Folder 5 East Wall, North Portal (4-faces of wall), 18"x23"
Containers Oversized-Folder 5 East Wall, North Portal (3-face of wall), 18"x23"
Containers Oversized-Folder 5 Cross Sections, Curved Wall, East side of North Portal, 18"x23"
Containers Oversized-Folder 5 Brownsville Avenue, 18"x23"
Containers Oversized-Folder 5 West Wall, North Portal (5 faces of wall), 18"x23"
Containers Oversized-Folder 5 West Wall, North Portal (face of wall), 18"x23"
Containers Oversized-Folder 5 Cross Sections on Radial Lines, Curved Wall West Side of North Portal,
18"x23"
Containers Oversized-Folder 5 New Street, Portal, 18"x23"
Containers Oversized-Folder 5 Top Curb, 18"x23"
Containers Oversized-Folder 5 Section A-A (springing line; top curb), 18"x23"
Containers Oversized-Folder 5 Section CL Between Tunnels (top shale; top of sandstone),
18"x23"
Containers Oversized-Folder 5 5+20 (top of sandstone; top of shale solid; top of shale broken up),
18"x23"
Containers Oversized-Folder 5 Section 23.02' East of CL of East Tube, 18"x23"
Containers Oversized-Folder 5 CL between Tubes (Curb grad =1.00%), 18"x23"
Containers Oversized-Folder 5 62+35 (Tunnel face profile), 18"x23"
Containers Oversized-Folder 5 Cross Section and Plan of Minsinger Stone Quarry before Excavation was
started, 18"x23"
Containers Oversized-Folder 5 Scope and Contents "Note: see LON-SEC-FOR Cover over Rock Sect. "C" - "E" - "G""
Concrete Wall over East Tube, 18"x23"
Containers Oversized-Folder 5 Dotted line and straight line, 850-910 elevation, 18"x23"
Containers Oversized-Folder 5 Liberty Tunnel Blueprints - Curb Profiles
North End grades Section/Profile, 30"x22" (2)
Containers Oversized-Folder 6 North End Section/Profile, 30"x22" (2)
Containers Oversized-Folder 6 North End Sidewalk Section/Profile (superseded) Section 1,2,3,4,
30"x22"
Containers Oversized-Folder 6 North and South Profiles (superseded) showing proposed grade at North End
of tunnel, 22"x24"
Containers Oversized-Folder 6 Profile with William St. and location of catch basin, 30"x22"
Containers Oversized-Folder 6 South End Cross Sections, 19"x19"
Containers Oversized-Folder 6 Photographs , 1916-1926
Language English.
Scope and Contents The photographs document the construction process. Images of ventilation equipment and
the site at various stages of construction are prevalent. Also, there are several
pictures of the groundbreaking ceremony. Photographs referencing other projects are
included in this series as well.
Item CLP-LTC-001 Groundbreaking, Four men, A.D. Neeld
Containers box 26 Language English.
Item CLP-LTC-002 Groundbreaking, Four men, A.D. Neeld
Containers box 26 Language English.
Item CLP-LTC-003 Groundbreaking, Four men, A.D. Neeld
Containers box 26 Language English.
Item CLP-LTC-004 View of Liberty Tunnel Power Plant , January 19, 1926
Containers box 26 Language English.
Item CLP-LTC-005 Liberty Tunnel, view from Bell Tavern or West Liberty Entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-006 Liberty Tunnel, view from Bell Tavern or West Liberty Entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-007 Liberty Tunnel, view from Bell Tavern or West Liberty Entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-008 Liberty Tunnel, view from Bell Tavern or West Liberty Entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-009 Liberty Tunnel, view from Bell Tavern or West Liberty Entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-010 Liberty Tunnel, view from Bell Tavern or West Liberty Entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-011 Liberty Tunnel, view of south end or Knox School entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-012 Liberty Tunnel, view of south end or Knox School entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-013 Liberty Tunnel, view of south end or Knox School entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-014 Liberty Tunnel, view of south end or Knox School entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-015 Liberty Tunnel, view of south end or Knox School entrance , May 27, 1920
Containers box 26 Language English.
Item CLP-LTC-016 Liberty Tunnel, view of south end or Knox School entrance
Containers box 26 Language English.
Item CLP-LTC-017 Early-stage view inside tunnel along with tracks and cart , December 4, 1920
Containers box 26 Language English.
Item CLP-LTC-018 Early-stage view inside tunnel showing work and lights , December 4, 1920
Containers box 26 Language English.
Item CLP-LTC-019 View of steelwork within tunnel
Containers box 26 Language English.
Item CLP-LTC-020 View of steelwork within tunnel
Containers box 26 Language English.
Item CLP-LTC-021 View of steelwork within tunnel
Containers box 26 Language English.
Item CLP-LTC-022 View of steelwork within tunnel
Containers box 26 Language English.
Item CLP-LTC-023 View of south portal , November 1, 1923
Containers box 26 Language English.
Item CLP-LTC-024 View of No. 7 exhaust fan, East Tube
Containers box 26 Language English.
Item CLP-LTC-025 View of Utica Imperial Steam Boiler
Containers box 26 Language English.
Item CLP-LTC-026 View of Exhaust Air Compartment, top of shaft, West Tube
Containers box 26 Language English.
Item CLP-LTC-027 View of No. 2 Court
Containers box 26 Language English.
Item CLP-LTC-028 View of Court
Containers box 26 Language English.
Item CLP-LTC-029 View of inner ductwork
Containers box 26 Language English.
Item CLP-LTC-030 View of inner room with meters and ducts, men present
Containers box 26 Language English.
Item CLP-LTC-031 View of inner room with meters and ducts, men present
Containers box 26 Language English.
Item CLP-LTC-032 View of inner room with meters and ducts, men present
Containers box 26 Language English.
Item CLP-LTC-033 View of inner room with meters and ducts, men present
Containers box 26 Language English.
Item CLP-LTC-034 View of Tunnel Power Plant
Containers box 26 Language English.
Item CLP-LTC-035 View of Tunnel Power Plant
Containers box 26 Language English.
Item CLP-LTC-036 View from north approach roadway , November 1, 1923
Containers box 26 Language English.
Item CLP-LTC-037 View of tunnel north portal , November 1, 1923
Containers box 26 Language English.
Item CLP-LTC-038 View of south portal lit at night with traffic signage
Containers box 26 Language English.
Item CLP-LTC-039 View showing construction of ventilation plant , November 1, 1923
Containers box 26 Language English.
Item CLP-LTC-040 View showing building under construction from Warrington Avenue , November 1, 1923
Containers box 26 Language English.
Item CLP-LTC-041 View showing stacks and buildings during construction of ventilation
plant , November 1, 1923
Containers box 26 Language English.
Item CLP-LTC-042 View of carbon monoxide graphic recorder
Containers box 26 Language English.
Item CLP-LTC-043 View of carbon monoxide graphic recorder
Containers box 26 Language English.
Item CLP-LTC-044 View of carbon monoxide graphic recorder
Containers box 26 Language English.
Item CLP-LTC-045 View of transformer room
Containers box 26 Language English.
Item CLP-LTC-046 View of high-tension switch room
Containers box 26 Language English.
Item CLP-LTC-047 View of the operating room
Containers box 26 Language English.
Item CLP-LTC-048 View of motor-control switchboard
Containers box 26 Language English.
Item CLP-LTC-049 View of 2200 and 220 volt alternating-current switchboards
Containers box 26 Language English.
Item CLP-LTC-050 View of an air chamber
Containers box 26 Language English.
Item CLP-LTC-051 No. 1 Area 4, Exhaust Fans chamber, West Tube
Containers box 26 Language English.
Item CLP-LTC-052 View of fan with double-motor drive and magnetic clutch control
Containers box 26 Language English.
Item CLP-LTC-053 View of rotary converters and alternating-current control panels
Containers box 26 Language English.
Item CLP-LTC-054 View of direct-current motors
Containers box 26 Language English.
Item CLP-LTC-055 View of ventilating fan with double-motor drive and magnetic clutch
control
Containers box 26 Language English.
Item CLP-LTC-056 View of No. 4 ventilating fan, West Tube
Containers box 26 Language English.
Item CLP-LTC-057 View of No. 4 supply fan, East Tube
Containers box 26 Language English.
Item CLP-LTC-058 View of fan
Containers box 26 Language English.
Item CLP-LTC-059 View of No. 3 supply fan, West Tube
Containers box 26 Language English.
Item CLP-LTC-060 View of washroom
Containers box 26 Language English.
Item CLP-LTC-061 Entrance to Liberty Tunnel Ventilation Powerplant
Containers box 26 Language English.
Item CLP-LTC-062 Entrance to Liberty Tunnel Ventilation Powerplant
Containers box 26 Language English.
Item CLP-LTC-063 View of Powerplant
Containers box 26 Language English.
Item CLP-LTC-064 framed, view of powerplant
Containers box 26 Language English.
Item CLP-LTC-065 framed, view of powerplant
Containers box 26 Language English.
