Structure 100000130087010 · Howard County, MD

Md 175 EB over Little Patuxent River

Carries Md 175 EB over Little Patuxent River, 0.27 Mile North Of US 29.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT140 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

140 ft end to end, longest span 64 ft. 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 slab bridge.

Built197452 years old
Length140.1 ft42.7 m
Daily traffic47,121counted 2009
Last inspectedApril 2024every 24 months

Location

StateMaryland
CountyHoward
Location0.27 Mile North Of US 29
CarriesMd 175 EB
CrossesLittle Patuxent River
Coordinates39.22683, -76.85081

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length140.1 ft (42.7 m)
Max Span64.0 ft (19.5 m)
Deck Width42.7 ft (13 m)
Deck Area555.1 sq m
Main Spans3
Year Built1974

Traffic

Avg Daily Traffic47,121 (2009)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number100000130087010

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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