Structure 100000020044010 · Anne Arundel County, MD

Md 170 over Severn Run

Carries Md 170 over Severn Run, 1.2 Mile North Of Md 175.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT34 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

34 ft end to end. Lengths and the car 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 tee-beam bridge.

Built193690 years old
Length34.1 ft10.4 m
Daily traffic21,621counted 2009
Last inspectedJuly 2023every 24 months

Location

StateMaryland
CountyAnne Arundel
Location1.2 Mile North Of Md 175
CarriesMd 170
CrossesSevern Run
Coordinates39.10397, -76.69354

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length34.1 ft (10.4 m)
Max Span30.8 ft (9.4 m)
Deck Width44.0 ft (13.4 m)
Deck Area139.4 sq m
Main Spans1
Year Built1936

Traffic

Avg Daily Traffic21,621 (2009)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical5 — Stable for scour
Structure Number100000020044010

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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