US Bridges

Mayfield Avenue over Deep Run

Fair

Howard County, Maryland · 0.2 MI W of Md RTE 103 · Structure no. 200000HO0062010

Built
1945
80 years old, rebuilt 1992
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
5,788
2002 count
Owner
County
County Highway Agency

About this bridge

Mayfield Avenue over Deep Run is a steel stringer/multi-beam or girder carrying Mayfield Avenue over Deep Run in Howard County, Maryland. It was built in 1945 and reconstructed in 1992, so it is 80 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 6 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 5,788 vehicles a day, roughly 4% of them trucks, projected to reach 8,250 by 2015. The structure is 28 ft (8.5 m) long and 45 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesMayfield Avenue
CrossesDeep Run
Location0.2 MI W of Md RTE 103
RouteCounty Highway 134
CountyHoward County
StateMaryland
Coordinates39.19427, -76.78062
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96 US tons
Inventory rating57.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width45 ft (13.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,788 (2002)
Projected traffic8,250 by 2015
Trucks4%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mayfield Avenue over Deep Run built?

It was built in 1945, making it 80 years old in 2025. It was reconstructed in 1992.

What condition is Mayfield Avenue over Deep Run 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 March 2023.

How much traffic does Mayfield Avenue over Deep Run carry?

About 5,788 vehicles per day (2002 count), of which roughly 4% are trucks.

How long is Mayfield Avenue over Deep Run?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 45 ft wide.

Who owns Mayfield Avenue over Deep Run?

It is owned by the County Highway Agency.