Structure 100000130153013 · Howard County, MD

Md 175 Ebr over Snowden River Parkway

Carries Md 175 Ebr over Snowden River Parkway, 0.84 Mile West Of Md 108.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT225 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

225 ft end to end, longest span 110 ft: about 3 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 girder bridge.

Built200125 years old
Length225.1 ft68.6 m
Daily traffic30,855counted 2012
Last inspectedSeptember 2023every 24 months

Location

StateMaryland
CountyHoward
Location0.84 Mile West Of Md 108
CarriesMd 175 Ebr
CrossesSnowden River Parkway
Coordinates39.19106, -76.81094

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length225.1 ft (68.6 m)
Max Span109.9 ft (33.5 m)
Deck Width62.0 ft (18.9 m)
Deck Area1296.5 sq m
Main Spans2
Year Built2001

Traffic

Avg Daily Traffic30,855 (2012)
Truck Traffic9%
Lanes On Bridge4
Lanes Under Bridge11

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number100000130153013

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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