N LASALLE ST over MAIN BR CHICAGO RIV

Map 

Facts 

Name:	N LASALLE ST over MAIN BR CHICAGO RIV
Structure number:	000016603226800
Location:	307 N LASALLE ST.
Purpose:	Carries highway over waterway
Route classification:	Other Principal Arterial (Urban) [14]
Length of largest span:	242.1 ft. [73.8 m]
Total length:	347.1 ft. [105.8 m]
Roadway width between curbs:	56.1 ft. [17.1 m]
Deck width edge-to-edge:	86.0 ft. [26.2 m]
Vertical clearance below bridge:	18.7 ft. [5.7 m]
Owner:	City or Municipal Highway Agency [04]
Year built:	1928
Historic significance:	Bridge is possibly eligible for the National Register of Historic Places [3]
Main span material:	Steel [3]
Main span design:	Movable - Bascule [16]
Deck type:	Open Grating [3]
Wearing surface:	Other [9]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	12,050 [as of 2006]
Truck traffic:	10% of total traffic
Deck condition:	Poor [4 out of 9]
Superstructure condition:	Poor [4 out of 9]
Substructure condition:	Fair [5 out of 9]
Channel protection:	Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	45.5 tons [41.4 metric tons]
Inventory rating:	26.7 tons [24.3 metric tons]
Evaluation:	Structurally deficient [1]
Sufficiency rating:	41.8
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:	$2,612,000

2000 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	3,004 [as of 1989]
Deck condition:	Serious [3 out of 9]
Superstructure condition:	Poor [4 out of 9]
Substructure condition:	Fair [5 out of 9]
Channel protection:	Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Pier/abutment protection:	In place and functioning [2]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	48.5 tons [44.1 metric tons]
Inventory rating:	35.6 tons [32.4 metric tons]
Evaluation:	Structurally deficient [1]
Sufficiency rating:	48.6
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:	$2,612,000

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	6,009 [as of 1989]
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 in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Pier/abutment protection:	In place and functioning [2]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	35.6 tons [32.4 metric tons]
Inventory rating:	35.6 tons [32.4 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	63.3
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:	$2,612,000

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