SR-21 over US-17 (SR-15)


+30.29583, -81.72056
30°17'45" N, 81°43'14" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:SR-21 over US-17 (SR-15)
Structure number:720118
Location:BLANDING BLVD./US-17 & RR
Purpose:Carries highway over highway and railroad
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:75.1 ft. [22.9 m]
Total length:495.1 ft. [150.9 m]
Roadway width between curbs:60.0 ft. [18.3 m]
Deck width edge-to-edge:67.3 ft. [20.5 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Skew angle:99°
Owner:State Highway Agency [01]
Year built:1968
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:8
Main spans material:Prestressed concrete [5]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: December 2017

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:25,000 [as of 2016]
Truck traffic:4% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:96.8

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
December 2017GoodGoodGoodGood2500096.8
December 2015GoodGoodGoodGood2200095.9
December 2013GoodGoodGoodGood2350096.9
December 2011GoodGoodGoodGood2550096.8
December 2009GoodGoodGoodGood2500096.8
December 2007GoodGoodGoodGood2750096.7
December 2005GoodGoodGoodGood2800094.0
December 2003GoodGoodGoodGood2750091.0
January 2002GoodGoodGoodGood2950090.8
February 2000GoodGoodGoodGood2850090.9
March 1998GoodGoodGoodGood2720191.1
March 1996GoodGoodGoodGood2700088.0
March 1994GoodGoodGoodGood2636088.9
April 1992GoodGoodGoodGood2555089.0
April 1990GoodGoodVery GoodVery Good1864084.4

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Prestressed Concrete Girder/Beamlinear ft.4,3364,3152100
Reinforced Concrete Decksq. ft.33,30027,2586,04200
Reinforced Concrete Columneach3531130
Reinforced Concrete Abutmentlinear ft.174174000
Reinforced Concrete Pier Caplinear ft.6095921610
Pourable Jointlinear ft.73859414220
Elastomeric Bearingeach138133320
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.990984600
Steel Protective Coatingsq. ft.3,9613,955600
Reinforced Concrete Bridge Raillinear ft.1,4851,4612130