Home > California > Hamilton City vicinity > Gianella Bridge, Spanning Sacramento River at State Highway 32, Hamilton City, Glenn County, CA
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Item Title
Gianella Bridge, Spanning Sacramento River at State Highway 32, Hamilton City, Glenn County, CA
LocationSpanning Sacramento River at State Highway 32,
Hamilton City vicinity, CA
Find maps of Hamilton City, CA
Created/Published
Documentation compiled after 1968.
Notes
Survey number HAER CA-44
Building/structure dates:
1908 initial construction
Building/structure dates:
1937 subsequent work
Building/structure dates:
1954 subsequent work
Significance: The Gianella Bridge is the oldest remaining highway swing bridge in California. It is important in local history for its relation to events in local economic and agricultural development. It is the work of John B. Leonard, one of the most important early 20th century bridge engineers. It was listed on the National Register of Historic Places in 1982.
Subjects
Sugar IndustrySwing BridgesBridge Construction
Related Names
Leonard, John Buck
California Department Of Transportation
Gianella, Vincenzo
Cotton Brothers
Asano, Pete, Photographer
Snyder, John, Historian
Tateishi, Don, Photographer
Collection
Historic American Engineering Record (Library of Congress)
Contents
Photograph caption(s):
1. VIEW TO NORTHWEST. DOWNSTREAM SIDE OF BRIDGE FROM CENTER OF RIVER. (Photographed from boat)
2. VIEW TO NORTH-NORTHWEST. DOWNSTREAM SIDE OF BRIDGE FROM WEST OF CENTER OF RIVER. (Photographed from boat)
3. VIEW TO WEST-NORTHWEST. DOWNSTREAM SIDE OF BRIDGE FROM EAST OF CENTER OF RIVER. (Photographed from boat)
4. VIEW TO NORTHEAST. OBLIQUE VIEW OF DOWNSTREAM SIDE OF BRIDGE FROM WEST BANK.
5. VIEW TO SOUTHEAST. OBLIQUE VIEW OF UPSTREAM SIDE OF BRIDGE. (Photographed from boat)
6. VIEW TO SOUTH. OBLIQUE VIEW OF UPSTREAM SIDE OF BRIDGE. (Photographed from boat)
7. VIEW TO NORTHEAST. VIEW ALONG CENTERLINE TOWARD WEST PORTAL, GLENN COUNTY SIDE OF BRIDGE.
8. VIEW TO SOUTHWEST. OBLIQUE VIEW OF EAST PORTAL, BUTTE COUNTY SIDE OF BRIDGE
9. VIEW TO NORTHEAST. DETAIL, OBLIQUE VIEW OF WEST APPROACH SPAN. NOTE PIN CONNECTIONS, UNDERSIDE DETAILS, SHADOW PATTERN CAST BY STEEL OPEN GRATE DECK.
10. VIEW TO NORTH. DETAIL, CENTER PIER AND CENTRAL PORTION OF SWING SPAN, INCLUDING CONTROL CABIN. (Photographed from boat)
11. VIEW TO NORTHEAST. DETAIL, CENTER PIER AND TURNTABLE ASSEMBLY. (Photographed from boat)
12. VIEW TO NORTHEAST. DETAIL, TURNTABLE ASSEMBLY, CONTROL CABIN, TRUSS CONNECTIONS OF CENTER PORTION OF SWING SPAN. (Photographed from boat)
13. VIEW TO WEST. DETAIL, WEST PIER, WEST APPROACH SPAN, LOCKING GEAR AT WEST END OF SWING SPAN. (photographed from boat)
14. VIEW TO EAST. DETAIL, CENTER PIER, TURNTABLE ASSEMBLY, CONTROL CABIN. (Photographed from boat) NOTE CUTWATER ON UPSTREAM SIDE OF CENTER PIER.
15. VIEW TO SOUTHEST. DETAIL, EAST ABUTMENT AND FENDER. (Photographed from boat)
16. VIEW TO NORTHEAST. DETAIL, VIEW THROUGH TRUSS FROM DECK OF CONTROL CABIN.
17. VIEW TO SOUTHWEST. DETAIL, SHAFT AND GEAR ASSEMBLY ON EXTERIOR CONTROL CABIN DECK.
18. VERTICAL VIEW. DETAIL, VIEW FROM LANDING ON CONTROL CABIN LADDER, AT APPROXIMATELY BRIDGE DECK LEVEL, SHOWING PORTION OF GEAR TRAIN AT TURNTABLE.
19. VIEW TO NORTHWEST. DOLPHIN AS SEEN FROM CONTROL CABIN DECK.
20. VIEW TO SOUTHWEST. DOLPHIN. (Photographed from boat) NOTE CUTWATER ON UPSTREAM SIDE OF DOLPHIN, AND THAT DOLPHIN IS OCTAGONAL AS OPPOSED TO CIRCULAR DESIGN OF CENTER PIER.
21. VIEW TO SOUTH. INTERIOR OF CONTROL CABIN FROM DOORWAY. INVERTED 'TEE'-SHAPED OBJECT IN LEFT CORNER AND LARGE WHITE WOODEN BEAM BOLTED TOGETHER TO FORM CAPSTAN UTILIZED FOR HAND OPERATION OF THE SWING SPAN.
22. VIEW TO SOUTHWEST. DETAIL, GEAR TRAIN SYSTEM, CONTROL CABIN INTERIOR.
23. VIEW TO WEST. DETAIL, OPERATING SYSTEM, CONTROL CABIN INTERIOR.
24. VIEW TO SOUTHWEST. DETAIL, GEAR TRAIN SYSTEM, BRIDGE OPEN INDICATOR POINTER AT UPPER CENTER, CONTROL CABIN INFERIOR.
25. VIEW TO WEST. DETAIL, ONE OF TWO WESTINGHOUSE DRIVE MOTORS, CONTROL CABIN INTERIOR.
26. VIEW TO EAST. OBLIQUE VIEW OF UPSTREAM SIDE, FROM WEST BANK, Photographer unknown, May 1939
27. VIEW TO NORTHEAST. VIEW ALONG CENTERLINE FROM WEST PORTAL, Photographer unknown, May 1939
28. VIEW TO NORTHEAST. VIEW OVER TOP OF TRUSS FROM CONTROL CABIN DECK. Photographer unknown, August 1947 (Note that frame for electrical power cables is still in place, though the bridge was converted to hand operation almost ten years earlier.)
29. VIEW TO NORTHWEST. DETAIL VIEW OF TURNTABLE, CONTROL CABIN AND CENTER PORTION OF SWING SPAN, DOWNSTREAM SIDE Photographer unknown, August 1947
30. VIEW TO WEST. DETAIL VIEW OF ORIGINAL LATTICE RAILING, LADDER TO CONTROL CABIN, DRIVE SHAFT FOR SWING SPAN AT RIGHT, NEXT TO LACED VERTICAL COMPRESSION MEMBER Photographer unknown, November 17, 1952
31. VIEW TO SOUTHWEST. VIEW ALONG CENTERLINE FROM EAST PORTAL Photographer unknown, ca. 1952
32. VIEW TO NORTHEAST. OBLIQUE VIEW OF DOWNSTREAM SIDE FROM WEST BANK Photographer unknown, January 12, 1955
33. VIEW TO SOUTHEAST. AERIAL VIEW OF AREA DURING FLOOD STAGE. GIANELLA BRIDGE AT UPPER RIGHT Photographer unknown, January 24, 1970
34. VIEW TO SOUTHWEST. AERIAL VIEW OF AREA DURING FLOOD STAGE, LOOKING ALONG CENTERLINE OF GIANELLA BRIDGE, WITH HAMILTON CITY, GLENN COUNTY, IN THE BACKGROUND Photographer unknown, January 24, 1970
35. PLAN AND ELEVATION OF GIANELLA BRIDGE John B. Leonard, dated April 1908
36. DETAIL SHEET, CENTER PIER DESIGN AND PIER PLACEMENT PLAN John B. Leonard, dated July 1909
37. DETAIL SHEET, PIER AND ABUTMENT PLANS AND ELEVATIONS John B. Leonard, dated April 1908
38. DETAIL SHEET, PIER AND ABUTMENT PLANS AND ELEVTIONS WITH SECTIONS SHOWING PILING PLACEMENT John B. Leonard, dated April 1908
39. DETAIL SHEET, PLAN AND ELEVATION OF TURNTABLE John B. Leonard, dated April 1908
40. DETAIL SHEET, DOLPHIN WITH SPECIFICATIONS John B. Leonard, dated July 1909
41. DETAIL SHEET, FENDERS AND DOLPHINS John B. Leonard (date illegible, but probably April 1908)
42. DETAIL SHEET, TRUSS STRAIN SHEET John B. Leonard (date unknown, but probably April 1908)
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