Pons Triangulum. The Lake Street Bridge’s Eastbound Portal. Overview: Steel Majesty, Uplifting Functional Artwork. #1B.

By Divi Logan, Photographer and Author.

Name of Structure: Lake Street Bridge and Structure Number: 016602900000000
Features Intersected: South Branch, Chicago River
Facility Carried: CTA commuter rail on the upper deck; vehicular and pedestrian traffic on the lower level.

EASTBOUND PORTAL FEATURES

The eastbound portal features an expansion joint and a different configuration of warning lights, distinguishing it from the westbound portal.

APPROACH and FRAMING of the EAST PORTAL’S ELEMENTS

PONS Lake St Appr EPort #316 061819 1831

#316.

PONS Lake St Appr EPort #372 061819 1836

#372

PONS Lake St Appr EPort #375 061819 1836

#375

PONS Lake St EPort DetailPlates #402 061819 1839

#402

PONS Lake St EPort DetailPlates #403 061819 1839.JPG

#403

PONS Lake St EPort GearRack #404 061819 1839

#404

PONS Lake St EPort DetailPlates #405 061819 1839

#405

PONS Lake St Web+Decks #407 061819 1839

#407

PONS Lake St EPort GR+P #409 061819 1840

#409

PONS Lake St EPort GR+P #411 061819 1840

#411

PONS Lake St EPort GR+P #415 061819 1840

#415

PONS Lake St EPort Plates TrSpan #418 061819 1840

#418

PONS Lake St EPort Plates TrSpan #423 061819 1841

#423

PONS Lake St EPort Plates TrSpan #428 061819 1841

#428

The gear racks, guardrails and bridge span railing, train deck approach span, roadway deck, lattice-braced gusset plates, and bridge orientation indicator near the east portal.

PONS Lake St EPort Web #331 061819 1832

#331

PONS Lake St #434 EBPort Util 061819 1842

#434

PONS Lake St EastPort 1 #437 1842

East portal #437.

PONS Lake St #436 EBPort Util 061819 1842

#436

PONS Lake St #439 EBPort Util 061819 1842

#439

PONS Lake St #440 EBPort Util 061819 1842

#440

PONS Lake St #445 EBPort Util 061819 1843

#445

PONS Lake St #447 EBPort Util 061819 1843

#447

PONS Lake St #449 EBPort Util 061819 1844

#449

PONS Lake St #450 EBPort Util 061819 1844

#450

PONS Lake St #452 EBPort Util 061819 1844

#452

PONS Lake St #455 EBPort Util 061819 1844

#455

PONS Lake St #461 EBPort 061819 1845

#461

RESOURCES

  1. U. S. Department of Transportation. Federal Highway Administration. Bridge Inspector’s Reference Manual. By Thomas W. Ryan, P.E, J. Eric Mann, P.E., Zachary M. Chill, E.I.T., and Bryan T. Ott. Revised. Washington: Government Printing Office. December 2012. Report No. FHWA NHI 12-050. Available from the National Technical Information Service in Springfield, Virginia 22161 and from the
    Superintendent of Documents. 27 October 2019.
  2. Holth, Nathan. Lake Street Bridge. NBI Data Sheet (2010 Inventory). Historic Bridges.org Bridge Browser. Bridge documented: August 12, 2006 and 2010- May 2012. https://historicbridges.org/bridges/browser/?bridgebrowser=truss/lake/ 27 October 2019.

 

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