Structure 200000BC3102010 · Baltimore County, MD

I-83 NB Off-ramp over 28th ST And Ns Railroad

Carries I-83 NB Off-ramp over 28th ST And Ns Railroad, 0.4 Mi N Of North AVE.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT433 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

433 ft end to end, longest span 73 ft: about 6 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1959rebuilt 1988
Length433.1 ft132 m
Daily traffic31,200counted 2016
Last inspectedFebruary 2024every 24 months

Location

StateMaryland
CountyBaltimore
Location0.4 Mi N Of North AVE
CarriesI-83 NB Off-ramp
Crosses28th ST And Ns Railroad
Coordinates39.31694, -76.62895

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length433.1 ft (132 m)
Max Span73.2 ft (22.3 m)
Deck Width23.0 ft (7 m)
Deck Area924 sq m
Main Spans7
Year Built1959 (reconstructed 1988)

Traffic

Avg Daily Traffic31,200 (2016)
Truck Traffic10%
Lanes On Bridge1
Lanes Under Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number200000BC3102010

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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