US Bridges

Md 4 NB over Lyons Creek

Fair

Calvert County, Maryland · On Anne Arundel CO Line · Structure no. 100000040017021

Built
1987
38 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
62 ft
Daily traffic
46,661
2009 count
Owner
State
State Highway Agency

About this bridge

Md 4 NB over Lyons Creek is a concrete culvert carrying Md 4 NB over Lyons Creek in Calvert County, Maryland. It was built in 1987, so it is 38 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 46,661 vehicles a day, roughly 8% of them trucks, projected to reach 26,584 by 2026. The structure is 62 ft (18.9 m) long and 53 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMd 4 NB
CrossesLyons Creek
LocationOn Anne Arundel CO Line
RouteState Highway 4
CountyCalvert County
StateMaryland
Coordinates38.76461, -76.6572
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.9 US tons
Inventory rating55 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span15 ft (4.6 m)
Deck width53 ft (16.2 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46,661 (2009)
Projected traffic26,584 by 2026
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 Md 4 NB over Lyons Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Md 4 NB over Lyons 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 2023.

How much traffic does Md 4 NB over Lyons Creek carry?

About 46,661 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 4 NB over Lyons Creek?

The structure is 62 ft (18.9 m) long with a longest span of 15 ft (4.6 m) and a deck 53 ft wide.

Who owns Md 4 NB over Lyons Creek?

It is owned by the State Highway Agency.