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Historic American Buildings Survey/Historic American Engineering Record/Historic American Landscapes Survey

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101 b&w photos		thumbnail
58 data pages		thumbnail
8 photo caption pages

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TITLE:
Keokuk & Hamilton Bridge, Spanning Mississippi River, Keokuk, Lee County, IA

CALL NUMBER:
HAER IOWA,56-KEOK,1-

REPRODUCTION NUMBER:
[See Call Number]

MEDIUM:
Photo(s): 101   (4 x 5 in. and 8 x 10 in.)
Data Page(s): 57 plus cover page
Photo Caption Page(s): 8

DATE:
Documentation compiled after 1968.

CREATOR:
Historic American Engineering Record, creator

RELATED NAME(S):
Modjeski, Ralph
Keokuk & Hamilton Bridge Company
Carnegie, Andrew

NOTE:
Survey number HAER IA-3

Building/structure dates: 1916 initial construction

Building/structure dates: 1952 subsequent work

Building/structure dates: 1956 subsequent work

Building/structure dates: 1957 subsequent work

Significance: The Keokuk & Hamilton Bridge is one of three remaining in Iowa that were designed by Ralph Modjeski, one of this country's premier early 20th century bridge engineers. The eleven-span, double-deck steel superstructure was built in 1915-1916 on piers retained from an earlier (1869-1871) structure, to meet greater loading requirements from railroads that operated across the Mississippi at this point. The Keokuk & Hamilton Bridge Company was incorporated in 1868 to further railroad and commercial development in Keokuk and in Hancock County, Illinois. The firm's president until 1914 was Andrew Carnegie, who had interest in the railroad participating in the venture. The first Keokuk & Hamilton Bridge was built by Carnegie's Keystone Bridge Co. from designs by Thomas Curtis Clarke, later a founder of Clarke, Reeves & Co. (which is best known under its subsequent name, Phoenix Bridge Co.). This structure stood until 1915, when pressure from Keokuk businessmen and the threatened erection of a competing bridge forced the Keokuk & Hamilton Bridge Co. to reconstruct its span. The replacement structure remained in corporate ownership until January 1949, when it was turned over to the city of Keokuk. Although the city intended that there should be no tolls for vehicular traffic, the span remained "free" for only three years. Tolls were reimposed in 1952, in order to finance maintenance and also major repairs to the piers, which were rejacketed with reinforced concrete in 1951-1952.

SUBJECTS:
IOWA--Lee County--Keokuk

COLLECTION:
Historic American Engineering Record (Library of Congress)

REPOSITORY:
Library of Congress, Prints and Photograph Division, Washington, D.C. 20540 USA

DIGID:
http://hdl.loc.gov/loc.pnp/hhh.ia0124

CONTENTS:
Photograph caption(s): 
1. GENERAL VIEW FROM UPSTREAM ON THE IOWA SHORE, LOOKING S. PHOTOGRAPHER: SARAH J. DENNETT
2. GENERAL VIEW FROM DOWNSTREAM ON THE ILLINOIS SHORE, LOOKING NNE. PHOTOGRAPHER: SARAH J. DENNETT
3. GENERAL VIEW FROM UPSTREAM ON THE ILLINOIS SHORE, LOOKING WSW. PHOTOGRAPHER: SARAH J. DENNETT
4. THREE-QUARTER VIEW FROM DOWNSTREAM ON THE IOWA SHORE, LOOKING E (SWING SPAN PARTIALLY OPEN.) PHOTOGRAPHER: SARAH J. DENNETT
5. THREE-QUARTER VIEW FROM DOWNSTREAM ON THE ILLINOIS SHORE, LOOKING NNW. PHOTOGRAPHER: HANS MUESSIG
6. KEOKUK HIGHWAY APPROACH AND TOLLBOOTH, LOOKING ESE. PHOTOGRAPHER: ROBERT A. RYAN
7. KEOKUK HIGHWAY APPROACH FROM SWING SPAN FENDER, LOOKING WNW. PHOTOGRAPHER: ROBERT A. RYAN
8. TOLLBOOTH AT KEOKUK: NORTHWEST ELEVATION. PHOTOGRAPHER: SARAH J. DENNETT
9. KEOKUK HIGHWAY APPROACH TRESTLE, LOOKING NE. PHOTOGRAPHER: SARAH J. DENNETT
10. KEOKUK HIGHWAY APPROACH TRESTLE. PHOTOGRAPHER: SARAH J. DENNETT
11. KEOKUK RAILROAD APPROACH. PHOTOGRAPHER: ROBERT A. RYAN
12. KEOKUK RAILROAD APPROACH, SHOWING ORIGINAL STONE WALL AND ROADBED, LOOKING NW. PHOTOGRAPHER: SARAH J. DENNETT
13. KEOKUK APPROACH SHOWING THE SEPARATION OF THE HIGHWAY AND RAILROAD ALIGNMENTS. PHOTOGRAPHER: SARAH J. DENNETT
14. ONE BENT ON THE KEOKUK HIGHWAY APPROACH TRESTLE. PHOTOGRAPHER: SARAH J. DENNETT
15. GENERAL DECK VIEW, KEOKUK HIGHWAY APPROACH, LOOKING E TOWARD THE BRIDGE. PHOTOGRAPHER: ROBERT A. RYAN
16. SWING SPAN: UPSTREAM ELEVATION, LOOKING SSW. PHOTOGRAPHER: ROBERT A. RYAN
17. SWING SPAN: DOWNSTREAM ELEVATION, LOOKING NNE. PHOTOGRAPHER: ROBERT A. RYAN
18. SWING SPAN: THREE-QUARTER VIEW FROM DOWNSTREAM ON IOWA SHORE, LOOKING NE. PHOTOGRAPHER: SARAH J. DENNETT
19. SWING SPAN: CENTER TOWER AND BRIDGE TENDER'S HOUSE. PHOTOGRAPHER: ROBERT A. RYAN
20. SWING SPAN: RAILROAD DECK. PHOTOGRAPHER: ROBERT A. RYAN
21. BRIDGE TENDER'S HOUSE FROM RAILROAD DECK, LOOKING SE. PHOTOGRAPHER: SARAH J. DENNETT
22. INTERIOR OF BRIDGE TENDER'S HOUSE SHOWING CLUTCH AND BRAKE HANDLES, AIR VALVE FOR RAIL LOCKS, AND MOTOR CONTROLLER FOR TURNING MACHINERY, LOOKING N. PHOTOGRAPHER: SARAH J. DENNETT & ROBERT A. RYAN
23. INTERIOR OF BRIDGE TENDER'S HOUSE SHOWING INDICATORS FOR RAIL LOCKS AND END LIFT MACHINERY (RIGHT), LOOKING ESE. PHOTOGRAPHER: SARAH J. DENNETT & ROBERT A. RYAN
24. REDUCTION GEARING FOR SWING MACHINERY; ALSO SHOWING DRIVE PINION, RACK AND ROLLERS. PHOTOGRAPHER: HANS MUESSIG
25. DRUM, SHOWING LOWER CHORD AT DRUM, PINION GEAR AND DRIVE SHAFT, RACK, AND ROLLERS. PHOTOGRAPHER: HANS MUESSIG
26. DRUM, SHOWING ROLLERS AND RACK. PHOTOGRAPHER: ROBERT A. RYAN
27. INTERIOR OF DRUM, OVERALL VIEW. PHOTOGRAPHER: SARAH J. DENNETT & ROBERT A. RYAN
28. INTERIOR OF DRUM SHOWING RADIAL STAYS FOR DRUM AND WHEEL FRAME. PHOTOGRAPHER: HANS MUESSIG
29. BARREL SHOT OF SWING SPAN IN OPEN POSITION. PHOTOGRAPHER: HANS MUESSIG
30. END FLOOR BEAM AND LIFTING JACKS ON SWING SPAN LOOKING TOWARD CENTER TOWER. PHOTOGRAPHER: HANS MUESSIG
31. END FLOOR BEAM AND LIFTING JACKS ON SWING SPAN, LOOKING AWAY FROM THE CENTER TOWER. PHOTOGRAPHER: ROBERT A. RYAN
32. SWING SPAN: HIGHWAY DECK, SHOWING AUTOMOBILE BARRICADES. PHOTOGRAPHER: SARAH J. DENNETT
33. UPPER CONNECTIONS AT SWING SPAN CENTER TOWER. PHOTOGRAPHER: ROBERT A. RYAN
34. TOP CHORD OF ILLINOIS ARM OF SWING SPAN. PHOTOGRAPHER: ROBERT A. RYAN
35. INSIDE VIEW OF THE TOP CHORD-ENDPOST CONNECTION ON THE SWING SPAN. PHOTOGRAPHER: ROBERT A. RYAN
36. SWING SPAN: BOTTOM CHORD CONNECTION AT 5L. PHOTOGRAPHER: ROBERT A. RYAN
37. BOTTOM CHORD CONNECTION AT CENTER TOWER AND DRUM. PHOTOGRAPHER: ROBERT A. RYAN
38. SWING SPAN: BOTTOM CHORD CONNECTION AT 4L. PHOTOGRAPHER: HANS MUESSIG
39. SWING SPAN: ABUTMENT AND ENDPOST. PHOTOGRAPHER: ROBERT A. RYAN
40. SWING SPAN: LIFTING AND LOCKING JACKS ON ABUTMENT. PHOTOGRAPHER: HANS MUESSIG
41. RAIL LOCKS ON SWING SPAN. PHOTOGRAPHER: HANS MUESSIG
42. UPSTREAM ELEVATION OF THE TWO PARKER SPANS, LOOKING SSE. PHOTOGRAPHER: ROBERT A. RYAN
43. THREE-QUARTER VIEW OF PARKER SPAN FROM DOWNSTREAM ON IOWA SHORE, LOOKING NE. PHOTOGRAPHER: HANS MUESSIG
44. PIER 2 FROM PIER 1, SWING SPAN OPEN; BARREL SHOT OF PARKER TRUSS. PHOTOGRAPHER: HANS MUESSIG
45. TOP CHORD OF PARKER SPAN FROM WALKWAY. PHOTOGRAPHER: ROBERT A. RYAN
46. PARKER SPAN: TOP CHORD CONNECTION 4L. PHOTOGRAPHER: SARAH J. DENNETT
47. PARKER SPAN: CONNECTION BETWEEN ENDPOST AND TOP CHORD. PHOTOGRPAHER: HANS MUESSIG
48. HIGHWAY FLOORBEAM ATTACHMENT TO VERTICALS OF PARKER SPAN. PHOTOGRAPHER: HANS MUESSIG & SARAH J. DENNETT
49. PARKER SPAN: BOTTOM CHORD CONNECTION 2L. PHOTOGRAPHER: HANS MUESSIG & SARAH J. DENNET
50. PARKER SPAN: BOTTOM CHORD CONNECTION AT 4L. PHOTOGRAPHER: ROBERT A. RYAN
51. DOWNSTREAM ELEVATION OF PRATT SPAN, LOOKING NNE. PHOTOGRAPHER: HANS MUESSIG
52. THREE QUARTER VIEW OF PRATT SPANS, LOOKING NNW. PHOTOGRAPHER: HANS MUESSIG
53. PORTAL OF PRATT SPAN AT HAMILTON END. PHOTOGRAPHER: HANS MUESSIG
54. DECK OF PRATT SPAN, LOOKING ESE TOWARD ILLINOIS SHORE. PHOTOGRAPHER: ROBERT A. RYAN
55. HAMILTON ABUTMENT. PHOTOGRAPHER: HANS MUESSIG
56. PRATT SPAN: FIXED SHOE ON HAMILTON ABUTMENT. PHOTOGRAPHER: ROBERT A. RYAN
57. INTERIOR OF PRATT SPAN SHOWING TOP LATERAL BRACING, TOP CHORD, AND TRUSS PANEL, LOOKING NW. PHOTOGRAPHER: HANS MUESSIG
58. PRATT SPAN: CONNECTION BETWEEN TOP CHORD AND INCLINED END POST. PHOTOGRAPHER: HANS MUESSIG
59. PRATT SPAN: TOP CHORD CONNECTION 2L. PHOTOGRAPHER: HANS MUESSIG
60. PRATT SPAN: BOTTOM CHORD CONNECTION 3R. PHOTOGRAPHER: ROBERT A. RYAN & HANS MUESSIG
61. BOTTOM CHORD AND LATERAL BRACING OF PRATT SPAN AND PIER 11. PHOTOGRAPHER: HANS MUESSIG
62. PRATT SPAN: BOTTOM CHORD AND LATERAL BRACING. PHOTOGRAPHER: HANS MUESSIG
63. HAMILTON RAILROAD AND HIGHWAY APPROACH. PHOTOGRAPHER: ROBERT A. RYAN
64. ILLINOIS HIGHWAY APPROACH LOOKING E. PHOTOGRAPHER: ROBERT A. RYAN
65. HAMILTON APPROACH LOOKING TOWARD BRIDGE, SHOWING TRANSFER OF THE HIGHWAY APPROACH TO THE BRIDGE STRUCTURE. PHOTOGRAPHER: ROBERT A. RYAN
66. TRUSS WORK AT ROADWAY CURVE ON TO BRIDGE, LOOKING NW. PHOTOGRAPHER: ROBERT A. RYAN
67. PHOTOCOPY OF POSTCARD (ORIGINAL IN THE POSSESSION OF THE STATE HISTORICAL SOCIETY OF IOWA) POSTMARK 1906 ORIGINAL (1869-71) KEOKUK AND HAMILTON BRIDGE, FROM NORTHWEST
68. PHOTOCOPY OF POSTCARD (ORIGINAL IN THE POSSESSION OF THE STATE HISTORICAL SOCIETY OF IOWA) WESTERN MERCANTILE CO., KEOKUK, IOWA; POSTMARK 1911 ORIGINAL (1869-71) KEOKUK AND HAMILTON BRIDGE, FROM WSW
69. PHOTOCOPY OF PHOTOGRAPH (ORIGINAL IN THE POSSESSION OF THE STATE HISTORICAL SOCIETY OF IOWA) DATED 5 JULY 1913 ORIGINAL (1869-71) KEOKUK AND HAMILTON BRIDGE, FROM N
70. PHOTOCOPY OF PHOTOGRAPH (ORIGINAL IN THE POSSESSION OF THE STATE HISTORICAL SOCIETY OF IOWA) ANSCHUTZ, PHOTOGRAPHER, C. 1913 ORIGINAL (1869-71) KEOKUK AND HAMILON BRIDGE, FROM N
71. PHOTOCOPY OF POSTCARD (ORIGINAL IN THE POSSESSION OF THE STATE HISTORICAL SOCIETY OF IOWA) L. L. COOK CO., MILWAUKEE, NO POSTMARK SECOND (1915-1916) KEOKUK AND HAMILTON BRIDGE, FROM NW
72. PHOTOCOPY OF DRAWING, GENERAL ELEVATION AND PLAN, 1' = 80' (INCLUDES ENTIRE BRIDGE)
73. PHOTOCOPY OF DRAWING, SUBSTRUCTURE, PIERS 1 - 11 INCLUSIVE, 3/16' = 1'
74. PHOTOCOPY OF DRAWING, STRESS SHEET, SPAN 4, 1' = 10' (PRATT, 160' 5 1/4')
75. PHOTOCOPY OF DRAWING, STRESS SHEET, SPAN 7, 1' = 10' (PRATT, 146' 11 7/8')
76. PHOTOCOPY OF DRAWING, STRESS SHEET, SPANS 8 - 11 INCLUSIVE, 1' = 10' (PRATTS, 162' 8 3/8')
77. PHOTOCOPY OF DRAWING, SPANS 4 - 11, TRUSSES, 3/4' = 1' (HALF ELEVATION, SEVERED)
78. PHOTOCOPY OF DRAWING, FLOOR AND BRACING, SPANS 4 11 INCLUSIVE, 3/4' = 1'
79. PHOTOCOPY OF DRAWING, END BEARINGS, SPANS 4 11 INCLUSIVE, 3/4' = 1'
80. PHOTOCOPY OF DRAWING, STRESS SHEET, SPANS 2 AND 3, 1' = 20' (PARKERS, 254' 5 1/4')
81. PHOTOCOPY OF DRAWING, SPANS 2 AND 3, TRUSSES LO - L2, 3/4' = 1' (ELEVATION, SEVERED)
82. PHOTOCOPY OF DRAWING, SPANS 2 AND 3, TRUSSES L3 - L4, 3/4' = 1' (ELEVATION, SEVERED)
83. PHOTOCOPY OF DRAWING, SPANS 2 AND 3, FLOORS AND BRACING, 3/4' = 1' (PLAN VIEWS)
84. PHOTOCOPY OF DRAWING, SPANS 2 AND 3, LATERALS, 3/4' = 1' (TOP AND BOTTOM LATERAL BRACING)
85. PHOTOCOPY OF DRAWING, SPANS 2 AND 3, END FLOOR BEAM AND BRACING, 3/4' = 1'
86. PHOTOCOPY OF DRAWING, SPANS 2 AND 3, END BEARINGS, 1 1/2' = 1'
87. PHOTOCOPY OF DRAWING, SPAN 1, STRESS SHEET, 1' = 15' (SWING SPAN, 377' 1 1/2')
88. PHOTOCOPY OF DRAWING, SPAN 1, TRUSSES LO - L3 INCLUSIVE, 3/4' = 1' (ELEVATION, SEVERED)
89. PHOTOCOPY OF DRAWING, SPAN 1, TRUSSES L4 - L6' INCLUSIVE, 3/4' = 1' (ELEVATION, SEVERED)
90. PHOTOCOPY OF DRAWING, SPAN 1, CENTER SUPPORT FOR WIRES AND LAMP, VARIOUS SCALES
91. PHOTOCOPY OF DRAWING, SPAN 1, FLOORS AND BRACING, 3/4' = 1' (SECTION AND PLAN)
92. PHOTOCOPY OF DRAWING, SPAN 1, BOTTOM LATERALS, 3/4' = 1'
93. PHOTOCOPY OF DRAWING, SPAN 1, DETAILS OF DRUM, 3/4' = 1' (ELEVATION, PLAN, AND SECTION)
94. PHOTOCOPY OF DRAWING, SPAN 1, TURNTABLE, 3/4' = 1'
95. PHOTOCOPY OF DRAWING, SPAN 1, DETAILS OF TURNTABLE MACHINERY, 3/4' and 1 1/2' = 1' (CENTER CONE, RADIAL STRUT RING, TRACK, ROLLERS, PINION GEARS)
96. PHOTOCOPY OF DRAWING, SPAN 1, POWER GEARING, 3/4' = 1'
97. PHOTOCOPY OF DRAWING, SPAN 1, END LIFT MACHINERY, 3/4' = 1'
98. PHOTOCOPY OF DRAWING, SPAN 1, GENERAL ARRANGEMENT OF RAIL LOCK AND END LIFT MACHINERY, 3/4' = 1'
99. PHOTOCOPY OF DRAWING, SPAN 1, RAIL LATCH, 3' and 6' = 1'
100. PHOTOCOPY OF DRAWING, SKETCHES SHOWING OPERATION OF AUTOMATIC SHIFTER
101. PHOTOCOPY OF DRAWING, SPANS 1 - 11, GEOMETRICAL AND DISTORTED LENGTHS

CONTROL #:
IA0124

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