historic context of maryland highway bridges built between 1948 ...

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SECTIONSIXResults of Field Investigations7.2 DESCRIPTIONS OF SURVEYED PROPERTIESBridge #: BC07800Bridge Name: I 895 Bridge over the CSX Railroad Tracks (MIHP# B-4632)County: Baltimore CityDate of Construction: 1957Bridge Type: K-trussNRHP Eligibility/ Criterion: Criterion A and Criterion CSummary Description:Bridge No. BC07800, a steel "K" truss bridge built in 1957, carries I 895 over the CSX (formerlyBaltimore and Ohio) Railroad tracks. The bridge connects the Harbor Tunnel thruway Brooklynarea to the toll plaza for the Baltimore Harbor Tunnel. The bridge runs east-west and carries fourlanes of vehicular traffic, two in each direction. A concrete median separates the two directionsof traffic. The bridge does not possess sidewalks. The bridge spans the CSX Railroad trackswith a vertical clearance of approximately 22 feet. The "K" truss portion of the bridge measuresjust over 977 feet in length. Piers that consist of four square concrete columns each support theapproach spans to the bridge and concrete girders. A large, centrally located concrete piersupports the "K" truss. The superstructure of the truss is composed of 28 full-sized "K" panels.Two smaller panels forming the end curve of the truss are located at each end of the structure.The substructure of the truss is composed of steel stringers and floor beams supporting aconcrete-filled steel grid deck.Statement of Significance:The I 895 Bridge (MIHP # B-4632, Bridge BC07800) over the CSX (formerly Baltimore &Ohio) Railroad tracks is historically associated with the construction of the Baltimore HarborTunnel. Completion of the tunnel was one of four major bridge/tunnel construction projects\15-SEP-11\\ 7-6
SECTIONSIXResults of Field Investigationsenvisioned in the 1938 Primary Bridge Program by the State Roads Commission. Its completionin 1957 was an important milestone in the nation‘s interstate highway system. The constructionof the tunnel‘s approach road, the Harbor Tunnel Thruway (now I 895), was an integral part ofthe Baltimore Harbor Tunnel project. Whitman, Requardt & Associates (WR&A) served as theconsulting bridge engineer in the design of the bridge which carried the Harbor Tunnel Thruwayover the tracks of the Baltimore & Ohio (B&O Railroad). The B&O placed several restrictionson the bridge‘s design, allowing only one pier skewed 45 degrees to fit between the existingtracks and a large sanitary trunk sewer in the 1,000 foot-long railroad track area. Based on theseand other considerations, WR&A chose a ―K‖ truss design, a highly unusual and complex designfor this bridge. Completed in 1957, the I 895 Bridge over the CSX tracks remains the onlyhighway bridge utilizing a ―K‖ truss design built in Maryland.National Register of Historic Places Eligibility:The I 895 Bridge (MIHP # B-4632, Bridge BC07800) over the CSX (formerly Baltimore &Ohio) Railroad tracks is National Register-eligible under Criterion A on the state level for itshistorical association with the construction of the Baltimore Harbor Tunnel, with the period ofsignificance of 1957. Completion of the tunnel was one of four major bridge/tunnel constructionprojects envisioned in the 1938 Primary Bridge Program by the State Roads Commission. Itscompletion in 1957 was an important milestone in the nation‘s interstate highway system. Theconstruction of the tunnel‘s approach road, the Harbor Tunnel Thruway (now I 895), was anintegral part of the Baltimore Harbor Tunnel project.The I 895 Bridge over the CSX tracks is not associated with an individual on the local, state, ornational level and is not National Register-eligible under Criterion B.The I 895 Bridge over the CSX tracks is National Register-eligible under Criterion C on the statelevel as the only highway bridge using a ―K‖ truss design built in Maryland, with a period ofsignificance of 1957. Whitman, Requardt & Associates (WR&A) served as the consulting bridgeengineer in the design of the bridge which carried the Harbor Tunnel Thruway over the tracks ofthe Baltimore & Ohio (B&O Railroad). The B&O placed several restrictions on the bridge‘sdesign, allowing only one pier skewed 45 degrees to fit between the existing tracks and a largesanitary trunk sewer in the 1,000 foot-long railroad track area. Based on these and otherconsiderations, WR&A chose the ―K‖ truss design, a highly unusual and complex design for thisbridge.National Register-eligibility under Criterion D was not investigated as a part of this study.\15-SEP-11\\ 7-7
Page 3 and 4: F I N A L R E P O R THISTORIC CONTE
Page 5: ERRATAURS completed this report in
Page 8 and 9: Executive SummaryHA-2046PG:68-100PG
Page 10 and 11: Table of ContentsConclusion and Rec
Page 12 and 13: SECTIONONEIntroductionTwenty one br
Page 14 and 15: 3. Section 1 ONE Methodolog ySECTIO
Page 16 and 17: SECTIONTWOMethodologyNineteen highw
Page 18 and 19: SECTIONTHREEHistoric Context1960 on
Page 20 and 21: SECTIONTHREEHistoric Contextcovered
Page 22 and 23: SECTIONTHREEHistoric Contextorigina
Page 24 and 25: SECTIONTHREEHistoric Contextexperie
Page 26 and 27: SECTIONTHREEHistoric Contextthe roa
Page 28 and 29: SECTIONTHREEHistoric Contextrespons
Page 30 and 31: SECTIONTHREEHistoric Context4.7 IMP
Page 32 and 33: SECTIONTHREEHistoric Contextrespons
Page 34 and 35: SECTIONTHREEHistoric Contextof outs
Page 36 and 37: SECTIONFOURPost World War II Techno
Page 42 and 43: SECTIONFIVEConsulting Engineers and
Page 48 and 49: SECTIONSIXResults of Field Investig
Page 96 and 97: SECTIONSEVENConclusion and Recommen
Page 98 and 99: SECTIONEIGHTReferences CitedCorddry
Page 100 and 101: SECTIONEIGHTReferences CitedKaszyns
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SECTIONEIGHTReferences CitedSeely,
Page 104 and 105:
Appendix A1948-1960 Maryland Bridge
Page 106 and 107:
Appendix BMaryland Bridges By Type
Page 108 and 109:
Appendix CResumes of Key Personnel\
Page 110 and 111:
Appendix DNotes From August 25, 200
Page 112:
Appendix DNotes From August 25, 200
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