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:17.4 ft. [5.3 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 2015 

Status:Open, no restriction [A]
Average daily traffic:22,000 [as of 2014]
Truck traffic:3% 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:Meets minimum tolerable limits to be left in place as is [4]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:42.0 tons [38.2 metric tons]
Inventory rating:35.5 tons [32.3 metric tons]
Sufficiency rating:95.9

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
December 201595.9Not deficientGoodGoodGood22000
December 201396.9Not deficientGoodGoodGood23500
December 201196.8Not deficientGoodGoodGood25500
December 200996.8Not deficientGoodGoodGood25000
December 200796.7Not deficientGoodGoodGood27500
December 200594.0Not deficientGoodGoodGood28000
December 200391.0Not deficientGoodGoodGood27500
January 200290.8Not deficientGoodGoodGood29500
February 200090.9Not deficientGoodGoodGood28500
March 199891.1Not deficientGoodGoodGood27201
March 199688.0Functionally obsoleteGoodGoodGood27000
March 199488.9Functionally obsoleteGoodGoodGood26360
April 199289.0Functionally obsoleteGoodGoodGood25550
April 199084.4Functionally obsoleteGoodVery GoodVery Good18640