US Bridges

Mt. Wilson Lane over Gwynns Falls

Fair

Baltimore County, Maryland · 0.03 MI S of Md 400 · Structure no. 100000030274010

Built
1973
52 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
65 ft
1 main span
Daily traffic
1,800
2006 count
Owner
State
State Highway Agency

About this bridge

Mt. Wilson Lane over Gwynns Falls is a steel stringer/multi-beam or girder carrying Mt. Wilson Lane over Gwynns Falls in Baltimore County, Maryland. It was built in 1973, so it is 52 years old, younger 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 1,800 vehicles a day, roughly 5% of them trucks, projected to reach 2,075 by 2026. The structure is 65 ft (19.8 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

No coordinates are recorded for this structure.

CarriesMt. Wilson Lane
CrossesGwynns Falls
Location0.03 MI S of Md 400
RouteCounty Highway 7113
CountyBaltimore 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.4 US tons
Inventory rating42.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span63 ft (19.2 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2006)
Projected traffic2,075 by 2026
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mt. Wilson Lane over Gwynns Falls built?

It was built in 1973, making it 52 years old in 2025.

What condition is Mt. Wilson Lane over Gwynns Falls 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 November 2023.

How much traffic does Mt. Wilson Lane over Gwynns Falls carry?

About 1,800 vehicles per day (2006 count), of which roughly 5% are trucks.

How long is Mt. Wilson Lane over Gwynns Falls?

The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.2 m) and a deck 27 ft wide.

Who owns Mt. Wilson Lane over Gwynns Falls?

It is owned by the State Highway Agency.