SR 99 over AURORA AVE, LAKE UNION

Map 

Facts 

Name:	SR 99 over AURORA AVE, LAKE UNION
Structure number:	0001447A0000000
Location:	7.7 N JCT SR 509
Purpose:	Carries highway and pedestrian walkway over highway, waterway, and railroad
Route classification:	Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:	799.9 ft. [243.8 m]
Total length:	2955.2 ft. [900.7 m]
Roadway width between curbs:	56.4 ft. [17.2 m]
Deck width edge-to-edge:	69.6 ft. [21.2 m]
Vertical clearance below bridge:	134.8 ft. [41.1 m]
Owner:	State Highway Agency [01]
Year built:	1931
Historic significance:	Bridge is on the National Register of Historic Places [1]
Design load:	M 18 / H 20 [4]
Number of main spans:	8
Main spans material:	Steel [3]
Main spans design:	Truss - Deck [09]
Deck type:	Concrete Cast-in-Place [1]
Wearing surface:	Bituminous [6]

2010 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	71,085 [as of 2007]
Truck traffic:	3% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Satisfactory [6 out of 9]
Substructure condition:	Fair [5 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:	40.6 tons [36.9 metric tons]
Inventory rating:	23.8 tons [21.6 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	44.1
Estimated cost of work:	$4,157,000

2000 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	73,836 [as of 1994]
Truck traffic:	6% of total traffic
Deck condition:	Satisfactory [6 out of 9]
Superstructure condition:	Satisfactory [6 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]
Scour condition:	Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:	40.6 tons [36.9 metric tons]
Inventory rating:	23.8 tons [21.6 metric tons]
Evaluation:	Functionally obsolete [2]
Sufficiency rating:	53.2
Estimated cost of work:	$4,152,000

1992 Inspection 

Status:	Open, no restriction [A]
Average daily traffic:	59,363 [as of 1984]
Truck traffic:	15% of total traffic
Deck condition:	Fair [5 out of 9]
Superstructure condition:	Poor [4 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]
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:	24.8 tons [22.5 metric tons]
Evaluation:	Structurally deficient [1]
Sufficiency rating:	27.8
Estimated cost of work:	$27,499,000

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