I-75 (NBL) over SR 61 (US 411)


+34.24550, -84.77344
34°14'44" N, 84°46'24" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I-75 (NBL) over SR 61 (US 411)
Structure number:000000001500930
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:88.9 ft. [27.1 m]
Total length:179.1 ft. [54.6 m]
Roadway width between curbs:67.6 ft. [20.6 m]
Deck width edge-to-edge:69.9 ft. [21.3 m]
Vertical clearance below bridge:17.1 ft. [5.2 m]
Skew angle:
Owner:State Highway Agency [01]
Year built:1970
Year reconstructed:1977
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
Number of main spans:2
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: August 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:64,580 [as of 2011]
Truck traffic:1% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Very Good [8 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Equal to present minimum criteria [6]
Underclearances appraisal:Better than present minimum criteria [7]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:39.6 tons [36.0 metric tons]
Inventory rating:23.8 tons [21.6 metric tons]
Sufficiency rating:85.5
Estimated cost of work:$1,621,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
August 201685.5FairSatisfactoryVery GoodGood-64580
July 201485.5GoodGoodVery GoodGood-64580
July 201285.5GoodGoodVery GoodGood-64580
July 201085.5GoodGoodVery GoodGood-68060
October 200885.5GoodGoodVery GoodGood-68060
August 200684.0GoodGoodVery GoodGood-67540
August 200498.0GoodGoodVery GoodGood-66130
August 200298.0GoodGoodVery GoodGood-57800
August 200098.0GoodGoodVery GoodGood-60100
October 199898.0GoodGoodVery GoodGood-60100
August 199697.0GoodGoodGoodGood-60100
September 199497.0GoodGoodGoodVery Good-60100
October 199297.0GoodGoodGoodVery Good-45080
December 199097.0GoodGoodGoodVery Good-45080

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.1,9581,958000
Reinforced Concrete Decksq. ft.12,46012,460000
Reinforced Concrete Columneach44000
Reinforced Concrete Abutmentlinear ft.148148000
Reinforced Concrete Pier Caplinear ft.7373000
Compression Jointlinear ft.140001400
Movable Bearingeach2222000
Fixed Bearingeach1111000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.356356000
Reinforced Concrete Bridge Raillinear ft.356356000
Wearing Surfacessq. ft.3,3603,360000
Steel Protective Coatingsq. ft.19,36419,364000