US Bridges

Md 179 over Mill Creek

Fair

Anne Arundel County, Maryland · 1.01 MI N of Md 648A · Structure no. 100000020052010

Built
1920
105 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
68 ft
2 main spans
Daily traffic
3,682
2009 count
Owner
State
State Highway Agency

About this bridge

Md 179 over Mill Creek is a concrete tee beam carrying Md 179 over Mill Creek in Anne Arundel County, Maryland. It was built in 1920, so it is 105 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 3,682 vehicles a day, roughly 8% of them trucks, projected to reach 5,523 by 2029. The structure is 68 ft (20.7 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

No coordinates are recorded for this structure.

CarriesMd 179
CrossesMill Creek
Location1.01 MI N of Md 648A
RouteState Highway 179
CountyAnne Arundel County
StateMaryland
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.5 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length68 ft (20.7 m)
Longest span28 ft (8.5 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,682 (2009)
Projected traffic5,523 by 2029
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$240,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 179 over Mill Creek built?

It was built in 1920, making it 105 years old in 2025.

What condition is Md 179 over Mill 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 July 2024.

How much traffic does Md 179 over Mill Creek carry?

About 3,682 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 179 over Mill Creek?

The structure is 68 ft (20.7 m) long with a longest span of 28 ft (8.5 m) and a deck 26 ft wide.

Who owns Md 179 over Mill Creek?

It is owned by the State Highway Agency.