I 59/20 over L & N & SOU RRS

Map 

Facts 

Name:	I 59/20 over L & N & SOU RRS
Structure number:	010497
Old structure number:	00000I59370265A (from 1992 edition)
Location:	I 59 & L & N SOU RRS
Purpose:	Carries highway over railroad and waterway
Route classification:	Principal Arterial - Interstate (Urban) [11]
Length of largest span:	89.9 ft. [27.4 m]
Total length:	630.0 ft. [192.0 m]
Roadway width between curbs:	62.7 ft. [19.1 m]
Deck width edge-to-edge:	65.6 ft. [20.0 m]
Vertical clearance below bridge:	21.7 ft. [6.6 m]
Skew angle:	45°
Owner:	State Highway Agency [01]
Year built:	1971
Historic significance:	Bridge is not eligible for the National Register of Historic Places [5]
Design load:	MS 18 / HS 20 [5]
Number of main spans:	9
Main spans material:	Steel continuous [4]
Main spans design:	Stringer/Multi-beam or girder [02]
Deck type:	Concrete Cast-in-Place [1]
Wearing surface:	Monolithic Concrete (concurrently placed with structural deck) [1]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	77,355 [as of 2008]
Truck traffic:	10% of total traffic
Deck condition:	Fair [5 out of 9]
Superstructure condition:	Fair [5 out of 9]
Substructure condition:	Fair [5 out of 9]
Channel protection:	Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	48.0 tons [43.6 metric tons]
Inventory rating:	36.0 tons [32.7 metric tons]
Sufficiency rating:	68.5
Recommended work:	Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:	$13,351,000

2000 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	76,835 [as of 1998]
Truck traffic:	8% of total traffic
Deck condition:	Fair [5 out of 9]
Superstructure condition:	Fair [5 out of 9]
Substructure condition:	Fair [5 out of 9]
Channel protection:	Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and rush restrict the channel. [5]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	47.9 tons [43.5 metric tons]
Inventory rating:	36.0 tons [32.7 metric tons]
Sufficiency rating:	65.6

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	61,460 [as of 1988]
Truck traffic:	8% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
Channel protection:	Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:	Scour calculation/evaluation has not been made. [6]
Operating rating:	44.6 tons [40.5 metric tons]
Inventory rating:	35.6 tons [32.4 metric tons]
Sufficiency rating:	84.9

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