IS 70 W over MADISON ST, CST MADISON,

Map 

Facts 

Name:	IS 70 W over MADISON ST, CST MADISON,
Structure number:	344
Old structure number:	A 507R1 3 (from 1992 edition)
Location:	S 6 T 50 N R 34 W
Purpose:	Carries highway over highway and railroad
Route classification:	Principal Arterial - Interstate (Urban) [11]
Length of largest span:	128.3 ft. [39.1 m]
Total length:	4336.2 ft. [1321.6 m]
Roadway width between curbs:	44.9 ft. [13.7 m]
Deck width edge-to-edge:	47.9 ft. [14.6 m]
Vertical clearance below bridge:	24.0 ft. [7.3 m]
Skew angle:	19°
Owner:	State Highway Agency [01]
Year built:	1960
Year reconstructed:	1992
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:	90
Main spans material:	Prestressed concrete continuous [6]
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:	Posted for load [P]
Average daily traffic:	34,115 [as of 2009]
Truck traffic:	18% of total traffic
Deck condition:	Good [7 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
Scour condition:	Bridge not over waterway. [N]
Operating rating:	46.2 tons [42.0 metric tons]
Inventory rating:	28.6 tons [26.0 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	75.7
Recommended work:	Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:	$20,965,000

2000 Inspection 

Status:	Posted for load [P]
Average daily traffic:	31,109 [as of 1997]
Truck traffic:	10% of total traffic
Deck condition:	Good [7 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Good [7 out of 9]
Channel protection:	Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	49.5 tons [45.0 metric tons]
Inventory rating:	28.7 tons [26.1 metric tons]
Sufficiency rating:	80.2

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	25,989 [as of 1991]
Truck traffic:	10% of total traffic
Deck condition:	Serious [3 out of 9]
Superstructure condition:	Serious [3 out of 9]
Substructure condition:	Good [7 out of 9]
Channel protection:	Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. [8]
Scour condition:	Scour calculation/evaluation has not been made. [6]
Operating rating:	49.5 tons [45.0 metric tons]
Inventory rating:	28.7 tons [26.1 metric tons]
Evaluation:	Structurally deficient [1]
Sufficiency rating:	12.9
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:	$17,978,000

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