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Benton Street Bridge, Spanning Iowa River at Benton Street, Iowa City, Johnson County, IA



B&W Photos

HB412252
View Showing North Elevation Of Bridge, Looking South [ryan}

HB412253
View Showing South Elevation Of Bridge, Looking North

HB412254
3/4 View Of Bridge From The East Bank Of The Iowa River, Looking Northwest [ryan]

HB412255
3/4 View Of Bridge From The West Bank Of The Iowa River, Looking Northeast [harms]

HB412256
3/4 View Of Bridge From The West Bank Of The Iowa River, Looking Southwest

HB412257
View Showing East Approach, Looking West [ryan & Harms]

HB412258
View Showing West Approach, Looking East [ryan]

HB412259
View Of Deck, Showing Sidewalk & Original Light Poles, Looking West [ryan]

HB412260
View Of Sidewalk & Sidewalk Railing, Showing Weld Between Railing Sections, Looking Northwest

HB412261
Detail View Of Sidewalk Railing, Showing Welded Seam, 'illinois-s-usa' Roller Mark, And Welder's Initials ('c.k.'), Looking North-northwest [harms]

HB412262
View Of Pier 3, Showing The Junction Of Panels 4 & 3 Of The South Girder, Looking Northeast [harms]

HB412263
Overall View Of Panel 4 From Beneath The Bridge, Showing Main Girders, Floor Beams & Stringers, Lateral Bracing, And Piers 3 & 2, Looking East [ryan & Harms]

HB412264
View Of Pier 2, Showing Fixed Shoes, The South Girder (panels 3 & 2), And Cantilever Brackets & Handrail, Looking Northwest [harms]

HB412265
Detail View Of The Cantilever & 's' Brackets And The South Handrail, Panel 1, Near The Southeast Abutment, Looking Northwest [harms]

HB412266
Detail View From Below The North Main Girder & Cantilever Brackets, Showing The Deteriorating Original Concrete Sidewalk And Its Steel Reinforcement, Panel 1, Looking West-southwest [harms]

HB412267
View Of Typical Main Girder Welded 'butt Splice,' Showing The 'eye Plates' And The Attachment Of The Sidewalk Cantilever Brackets, North Girder, Panel 5, Looking Southeast [ryan & Harms]

HB412268
Detail View Of A Typical Main Girder Welded 'butt Splice,' Showing The 'eye Plates,' South Girder, Panel 1, Looking North-northwest [harms}

HB412269
Detail View Of A Typical Welded Joint Between The Main Girder And The Floor Beam, Showing The Attachment Of A Lateral Bracing Member At This Point, South Girder, Panel 5, Looking South-southwest [ryan & Wieskamp]

HB412270
Detail View Of A Typical 't-stiffener' Welded To The Inside Of The Main Girder, Showing The Welded Attachment With A Sway Brace, Panel 1, South Girder, Looking Southeast [harms & Ryan]

HB412271
Detail View Of A Movable Shoe At Pier 1, Showing The South Main Girder And The Concrete Deterioration At The Top Of The Pier, Looking Northwest [harms]

HB412272
Detail View Of The Movable Shoe At The Southeast Abutment, Showing The Intersection Of The Floor Beam With A Lateral Brace And The South Main Girder, Panel 1, Looking South-southeast [ryan & Harms]

HB412273
Detail View Of The Concrete Northwest Abutment, Looking West-southwest From Below [ryan]

HB412274
Detail View Of The Northwest Abutment, Showing An Original Light Fixture And The 'historical Tablet,' Looking North-northeast From Below [ryan]

HB412275
Detail View Of Historical Tablet Located On The Northwest Abutment, Looking North-northeast [ryan]

HB412276
Detail View Of The Dedication Plaque Located On The Northeast Abutment, Looking North-northwest [ryan]

HB412277
View Showing Excavation For The Base Of Pier #1, Looking North The Support For The Previous Bridge

HB412278
View Showing The Placement Of Girder G7 Over Pier #3

HB412279
Low Level Aerial View, Looking West Along The New Bridge, With The Old Bridge To The Right

HB412280
View Showing West Approach Of Bridge, Looking West

HB412281
View Showing Welders At Work On Both The North And South Girders, With The Old Bridge In The Background, Looking Northwest

HB412282
General Aireal [sic] View Of Benton Street Bridge On May 11, 1949, Looking East

HB412283
View Showing The Pumping Of Concrete On Span 4, First Pour, May 12, 1949.

HB412284
3/4 View Of Completed Bridge, Looking Southeast (erection And Field Welding Was Completed On Monday, May 16, 1949)

HB412285
Title Sheet

HB412286
General Plan And Elevation, Sheet No

HB412287
Abutments, Sheet No

HB412288
Main Piers, Sheet No

HB412289
Cross Section & Floor Details, Sheet No

HB412290
Main Girders, Sheet No

HB412291
Approach Plan, Expansion Joints & Shoe Details, Sheet No

HB412292
Handrails And Curbs, Sheet No

HB412293
East Approach (elevation, Plan & Typical Cross Section), Sheet No

HB412294
West Approach (elevation, Plan & Typical Cross Section), Sheet No

HB412295
Miscellaneous [detail Drawings], Sheet No

HB412296
Erection Diagram (one Quarter Plan; Elevation Showing Shoes & Working Dimensions), Sheet No

HB412297
Erection Diagram (one Quarter Plan; Typical Section At Fl


Data Pages


Photo Caption Pages


Item Title


Location
Spanning Iowa River at Benton Street, Iowa City, IA

Find maps of Iowa City, IA


Created/Published
Documentation compiled after 1968.

Notes
Survey number HAER IA-30
Building/structure dates: 1949 initial construction
Building/structure dates: 1989 demolished
Significance: Crossing the Iowa River in the south-central section of Iowa City, the Benton Street Bridge is an all-welded, continuous, five-span, deck, plate-girder highway bridge. Although all-welded bridges appeared in the United States as early as the 1920s, welding was not widely advocated for new bridge construction until immediately after World War II, when a number of state highway departments began preparing all-welded, deck, plate-girder plans. Designed in 1947 and erected in 1949, the Benton Street Bridge introduced all-welded bridge construction to the State of Iowa, and was nationally recognized as one of the most notable examples of the new genre. An early champion of welding, the bridge's designer, Edward (Ned) L. Ashton, had previously engineered several major Mississippi River crossings, and would subsequently be responsible for the world's first welded aluminum highway bridge, completed in Des Moines, Iowa in 1958. Ashton has justifiably been called "the most distinguished bridge engineer in the history of Iowa."

Related Names
Ashton, Edward 'Ned' L.


Collection
Historic American Engineering Record (Library of Congress)

Contents
Photograph caption(s): 
1. VIEW SHOWING NORTH ELEVATION OF BRIDGE, LOOKING SOUTH [Ryan}
2. VIEW SHOWING SOUTH ELEVATION OF BRIDGE, LOOKING NORTH. THE ROCK ISLAND LINE RAILROAD BRIDGE CAN BE SEEN IN THE BACKGROUND TO THE NORTH, WITH THE BURLINGTON STREET BRIDGE IN THE DISTANCE [Ryan]
3. 3/4 VIEW OF BRIDGE FROM THE EAST BANK OF THE IOWA RIVER, LOOKING NORTHWEST [Ryan]
4. 3/4 VIEW OF BRIDGE FROM THE WEST BANK OF THE IOWA RIVER, LOOKING NORTHEAST [Harms]
5. 3/4 VIEW OF BRIDGE FROM THE WEST BANK OF THE IOWA RIVER, LOOKING SOUTHWEST. PIERS FROM THE OLD BENTON STREET BRIDGE CAN BE SEEN IN THE WATER TO THE LEFT OF THE BRIDGE [Harms]
6. VIEW SHOWING EAST APPROACH, LOOKING WEST [Ryan & Harms]
7. VIEW SHOWING WEST APPROACH, LOOKING EAST [Ryan]
8. VIEW OF DECK, SHOWING SIDEWALK & ORIGINAL LIGHT POLES, LOOKING WEST [Ryan]
9. VIEW OF SIDEWALK & SIDEWALK RAILING, SHOWING WELD BETWEEN RAILING SECTIONS, LOOKING NORTHWEST. THE PIERS FROM THE OLD BENTON STREET BRIDGE CAN BE SEEN IN THE WATER BELOW [Ryan]
10. DETAIL VIEW OF SIDEWALK RAILING, SHOWING WELDED SEAM, 'ILLINOIS-S-USA' ROLLER MARK, AND WELDER'S INITIALS ('C.K.'), LOOKING NORTH-NORTHWEST [Harms]
11. VIEW OF PIER 3, SHOWING THE JUNCTION OF PANELS 4 & 3 OF THE SOUTH GIRDER, LOOKING NORTHEAST [Harms]
12. OVERALL VIEW OF PANEL 4 FROM BENEATH THE BRIDGE, SHOWING MAIN GIRDERS, FLOOR BEAMS & STRINGERS, LATERAL BRACING, AND PIERS 3 & 2, LOOKING EAST [Ryan & Harms]
13. VIEW OF PIER 2, SHOWING FIXED SHOES, THE SOUTH GIRDER (PANELS 3 & 2), AND CANTILEVER BRACKETS & HANDRAIL, LOOKING NORTHWEST [Harms]
14. DETAIL VIEW OF THE CANTILEVER & 'S' BRACKETS AND THE SOUTH HANDRAIL, PANEL 1, NEAR THE SOUTHEAST ABUTMENT, LOOKING NORTHWEST [Harms]
15. DETAIL VIEW FROM BELOW THE NORTH MAIN GIRDER & CANTILEVER BRACKETS, SHOWING THE DETERIORATING ORIGINAL CONCRETE SIDEWALK AND ITS STEEL REINFORCEMENT, PANEL 1, LOOKING WEST-SOUTHWEST [Harms]
16. VIEW OF TYPICAL MAIN GIRDER WELDED 'BUTT SPLICE,' SHOWING THE 'EYE PLATES' AND THE ATTACHMENT OF THE SIDEWALK CANTILEVER BRACKETS, NORTH GIRDER, PANEL 5, LOOKING SOUTHEAST [Ryan & Harms]
17. DETAIL VIEW OF A TYPICAL MAIN GIRDER WELDED 'BUTT SPLICE,' SHOWING THE 'EYE PLATES,' SOUTH GIRDER, PANEL 1, LOOKING NORTH-NORTHWEST [Harms}
18. DETAIL VIEW OF A TYPICAL WELDED JOINT BETWEEN THE MAIN GIRDER AND THE FLOOR BEAM, SHOWING THE ATTACHMENT OF A LATERAL BRACING MEMBER AT THIS POINT, SOUTH GIRDER, PANEL 5, LOOKING SOUTH-SOUTHWEST [Ryan & Wieskamp]
19. DETAIL VIEW OF A TYPICAL 'T-STIFFENER' WELDED TO THE INSIDE OF THE MAIN GIRDER, SHOWING THE WELDED ATTACHMENT WITH A SWAY BRACE, PANEL 1, SOUTH GIRDER, LOOKING SOUTHEAST [Harms & Ryan]
20. DETAIL VIEW OF A MOVABLE SHOE AT PIER 1, SHOWING THE SOUTH MAIN GIRDER AND THE CONCRETE DETERIORATION AT THE TOP OF THE PIER, LOOKING NORTHWEST [Harms]
21. DETAIL VIEW OF THE MOVABLE SHOE AT THE SOUTHEAST ABUTMENT, SHOWING THE INTERSECTION OF THE FLOOR BEAM WITH A LATERAL BRACE AND THE SOUTH MAIN GIRDER, PANEL 1, LOOKING SOUTH-SOUTHEAST [Ryan & Harms]
22. DETAIL VIEW OF THE CONCRETE NORTHWEST ABUTMENT, LOOKING WEST-SOUTHWEST FROM BELOW [Ryan]
23. DETAIL VIEW OF THE NORTHWEST ABUTMENT, SHOWING AN ORIGINAL LIGHT FIXTURE AND THE 'HISTORICAL TABLET,' LOOKING NORTH-NORTHEAST FROM BELOW [Ryan]
24. DETAIL VIEW OF HISTORICAL TABLET LOCATED ON THE NORTHWEST ABUTMENT, LOOKING NORTH-NORTHEAST [Ryan]
25. DETAIL VIEW OF THE DEDICATION PLAQUE LOCATED ON THE NORTHEAST ABUTMENT, LOOKING NORTH-NORTHWEST [Ryan]
26. ViEW SHOWING EXCAVATION FOR THE BASE OF PIER #1, LOOKING NORTH THE SUPPORT FOR THE PREVIOUS BRIDGE. October 26, 1948
27. VIEW SHOWING THE PLACEMENT OF GIRDER G7 OVER PIER #3. April 11, 1949
28. LOW LEVEL AERIAL VIEW, LOOKING WEST ALONG THE NEW BRIDGE, WITH THE OLD BRIDGE TO THE RIGHT. April 23, 1949 (Field welding began at the far end of span #5. on April 19, 1949.)
29. VIEW SHOWING WEST APPROACH OF BRIDGE, LOOKING WEST. No date. (The field welding was by the Teleweld Corporation of Chicago, with four Lincoln welders from Tuesday, April 19 to Monday, May 16, 1949. 528 man hours of welders' time)
30. VIEW SHOWING WELDERS AT WORK ON BOTH THE NORTH AND SOUTH GIRDERS, WITH THE OLD BRIDGE IN THE BACKGROUND, LOOKING NORTHWEST. No date. (Welding of top flanges of cantilever brackets to girder occurred on May 10, 1949)
31. GENERAL AIREAL [sic] VIEW OF BENTON STREET BRIDGE ON MAY 11, 1949, LOOKING EAST. No date.
32. VIEW SHOWING THE PUMPING OF CONCRETE ON SPAN 4, FIRST POUR, MAY 12, 1949.
33. 3/4 VIEW OF COMPLETED BRIDGE, LOOKING SOUTHEAST (Erection and field welding was completed on Monday, May 16, 1949)
34. TITLE SHEET
35. GENERAL PLAN AND ELEVATION, Sheet No. 1
36. ABUTMENTS, Sheet No. 2
37. MAIN PIERS, Sheet No. 3
38. CROSS SECTION & FLOOR DETAILS, Sheet No. 4
39. MAIN GIRDERS, Sheet No. 5
40. APPROACH PLAN, EXPANSION JOINTS & SHOE DETAILS, Sheet No. 6
41. HANDRAILS AND CURBS, Sheet No. 7
42. EAST APPROACH (ELEVATION, PLAN & TYPICAL CROSS SECTION), Sheet No. 8
43. WEST APPROACH (ELEVATION, PLAN & TYPICAL CROSS SECTION), Sheet No. 9
44. MISCELLANEOUS [DETAIL DRAWINGS], Sheet No. 10
45. ERECTION DIAGRAM (ONE QUARTER PLAN; ELEVATION SHOWING SHOES & WORKING DIMENSIONS), Sheet No. E-2
46. ERECTION DIAGRAM (ONE QUARTER PLAN; TYPICAL SECTION AT FL. BM'S), Sheet No. E-3.


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