US Bridges

Md 173 over Stoney Creek

Fair

Anne Arundel County, Maryland · 0.16 Mile South of Md 642 · Structure no. 100000020045010

Built
1947
78 years old, rebuilt 1986
Condition
Fair
inspected December 2023
Type
Movable - Bascule
Steel
Length
889 ft
1 main span
Daily traffic
15,071
2022 count
Owner
State
State Highway Agency

About this bridge

Md 173 over Stoney Creek is a steel movable - bascule carrying Md 173 over Stoney Creek in Anne Arundel County, Maryland. It was built in 1947 and reconstructed in 1986, so it is 78 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 15,071 vehicles a day, roughly 2% of them trucks, projected to reach 20,798 by 2042. The structure is 889 ft (270.9 m) long and 43 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesMd 173
CrossesStoney Creek
Location0.16 Mile South of Md 642
RouteState Highway 173
CountyAnne Arundel County
StateMaryland
Coordinates39.16224, -76.52354
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.5 US tons
Inventory rating26.5 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+15 approach)
Design loadH 20
Structure length889 ft (270.9 m)
Longest span75 ft (22.9 m)
Deck width43 ft (13 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,071 (2022)
Projected traffic20,798 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Md 173 over Stoney Creek built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1986.

What condition is Md 173 over Stoney Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2023.

How much traffic does Md 173 over Stoney Creek carry?

About 15,071 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Md 173 over Stoney Creek?

The structure is 889 ft (270.9 m) long with a longest span of 75 ft (22.9 m) and a deck 43 ft wide.

Who owns Md 173 over Stoney Creek?

It is owned by the State Highway Agency.