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Mark Twain Bridge

Marion County, Missouri, and Pike County, Illinois
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Photos 

July 1997 photo

This photo was taken by David Birckhead

Map 

Facts 

Overview
Lost through truss bridge over the Mississippi River on US 36 at Hannibal
Location
Hannibal, Marion County, Missouri, and Pike County, Illinois
Status
Replaced by a new bridge to carry I-72
History
Opened Sept. 4, 1936; tolls removed Oct. 30, 1940; rehabilitated 1982; replaced and demolished 2000
Builders
- Mt. Vernon Bridge Co. of Mt. Vernon, Ohio (Superstructure)
- Sverdrup and Parcel
- Union Bridge Co. (Substructure)
Design
Subdivided Warren continuous through truss
Dimensions
Length of largest span: 626.8 ft.
Total length: 3,507.0 ft. (0.7 mi.)
Deck width: 23.9 ft.
Vertical clearance above deck: 14.2 ft.
Also called
Mark Twain Memorial Bridge (official name)
Hannibal Bridge (common name)
Approximate latitude, longitude
+39.71630, -91.35379   (decimal degrees)
39°42'59" N, 91°21'14" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/641103/4397565 (zone/easting/northing)
Land survey
T. 57 N., R. 4 W., Sec. 21
USGS topographic map
Hannibal East
Inventory numbers
MoDOT K-931A1 (Missouri Dept. of Transportation bridge number)
MoDOT K-931 (Missouri Dept. of Transportation bridge number)
BH 21999 (Bridgehunter.com ID)
Inspection (as of 09/1999)
Deck condition rating: Serious (3 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 8.0 (out of 100)
Average daily traffic (as of 1997)
16,920

Categories 

Built 1936 (746)
Built during 1930s (8,551)
Continuous (902)
Continuous truss (86)
Formerly NR-eligible (265)
Hannibal, Missouri (8)
Illinois (2,500)
Lost (10,374)
Lost 2000 (329)
Lost during 2000s (3,091)
Marion County, Missouri (43)
Mississippi River (155)
Missouri (4,528)
Mt. Vernon Bridge Co. (39)
Owned by state (9,811)
 Pike County, Illinois (39)
Replaced by new bridge (7,141)
Span length 500-1000 feet (313)
State line crossing (514)
Structurally deficient (16,683)
Sverdrup and Parcel (15)
Through truss (9,211)
Total length over 2500 feet (587)
Truss (23,575)
US 36 (35)
Union Bridge Co. (32)
Warren through truss (928)
Warren through truss with sub-panels (33)
Warren truss (3,961)

Update Log 

  • May 12, 2008: New photos from Historic American Engineering Record
  • May 1, 2006: Posted additional photo from David Birckhead

Sources 

  • David Birckhead
  • HAER MO-77 - Mark Twain Memorial Bridge, Spanning Mississippi River at US Route 36, Hannibal, Marion County, MO

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