Structure 200000W-H-31010 · Washington County, MD

Prospect Street over Antietam Street

Carries Prospect Street over Antietam Street, 1000 Ft W Of US RTE 40 E.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT31 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

31 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 multi-beam bridge.

Built1836rebuilt 1994
Length30.8 ft9.4 m
Daily traffic2,730counted 2019
Last inspectedApril 2024every 12 months

Location

StateMaryland
CountyWashington
Location1000 Ft W Of US RTE 40 E
CarriesProspect Street
CrossesAntietam Street
Coordinates39.64271, -77.72530

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length30.8 ft (9.4 m)
Max Span25.9 ft (7.9 m)
Deck Width48.9 ft (14.9 m)
Deck Area140.1 sq m
Main Spans1
Year Built1836 (reconstructed 1994)

Traffic

Avg Daily Traffic2,730 (2019)
Truck Traffic5%
Lanes On Bridge1
Lanes Under Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 12 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour CriticalNot applicable
Structure Number200000W-H-31010

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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