I 90 over DUNCAN DR,RATTLESNAKE CR

Map 

Facts 

Name:	I 90 over DUNCAN DR,RATTLESNAKE CR
Structure number:	I00090105+04672
Location:	MISSOULA
Purpose:	Carries highway over highway and waterway
Route classification:	Principal Arterial - Interstate (Urban) [11]
Length of largest span:	102.0 ft. [31.1 m]
Total length:	245.1 ft. [74.7 m]
Roadway width between curbs:	44.9 ft. [13.7 m]
Deck width edge-to-edge:	45.9 ft. [14.0 m]
Vertical clearance below bridge:	17.4 ft. [5.3 m]
Owner:	State Highway Agency [01]
Year built:	1966
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:	4
Main spans material:	Prestressed concrete [5]
Main spans design:	Stringer/Multi-beam or girder [02]
Deck type:	Concrete Cast-in-Place [1]
Wearing surface:	Bituminous [6]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	18,730 [as of 2008]
Truck traffic:	2% of total traffic
Deck condition:	Good [7 out of 9]
Superstructure condition:	Good [7 out of 9]
Substructure condition:	Satisfactory [6 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]
Pier/abutment protection:	Navigation protection not required [1]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	38.8 tons [35.3 metric tons]
Inventory rating:	35.9 tons [32.6 metric tons]
Sufficiency rating:	95.1

2000 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	18,950 [as of 1998]
Truck traffic:	2% of total traffic
Deck condition:	Very Good [8 out of 9]
Superstructure condition:	Very Good [8 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:	38.8 tons [35.3 metric tons]
Inventory rating:	35.9 tons [32.6 metric tons]
Sufficiency rating:	95.1

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	14,460 [as of 1991]
Truck traffic:	12% 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 assessed or calculated scour condition. [5]
Operating rating:	31.0 tons [28.2 metric tons]
Inventory rating:	35.6 tons [32.4 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	92.9

Comments