Structure 100000160011010 · Prince George's County, MD

Md 4 WB over Patuxent River

Carries Md 4 WB over Patuxent River, On Anne Arundel Co Line.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT256 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

256 ft end to end, longest span 98 ft: about 4 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.

Built199135 years old
Length255.9 ft78 m
Daily traffic49,641counted 2009
Last inspectedOctober 2023every 24 months

Location

StateMaryland
CountyPrince George's
LocationOn Anne Arundel Co Line
CarriesMd 4 WB
CrossesPatuxent River
Coordinates38.81118, -76.71177

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length255.9 ft (78 m)
Max Span98.1 ft (29.9 m)
Deck Width46.9 ft (14.3 m)
Deck Area1115.4 sq m
Main Spans3
Year Built1991

Traffic

Avg Daily Traffic49,641 (2009)
Truck Traffic6%
Lanes On Bridge3

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number100000160011010

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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