Muirkirk Road over US 1 & CSXT

FairPosted for load

Prince George's County, Maryland · Muirkirk Road at US 1 · Structure no. 200000P-0102010

Built: 1970; 55 years old, rebuilt 2008
Condition: Fair; inspected April 2024
Type: Stringer/Multi-beam or Girder; Steel Continuous
Length: 240 ft; 4 main spans
Daily traffic: 22,647; 2020 count
Owner: County; County Highway Agency

About this bridge

Muirkirk Road over US 1 & CSXT is a steel continuous stringer/multi-beam or girder carrying Muirkirk Road over US 1 & CSXT in Prince George's County, Maryland. It was built in 1970 and reconstructed in 2008, so it is 55 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. Its operating status is: posted for load restriction.

It carries about 22,647 vehicles a day, roughly 10% of them trucks, projected to reach 35,020 by 2042. The structure is 240 ft (73.2 m) long and 64 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

No coordinates are recorded for this structure.

CarriesMuirkirk Road

CrossesUS 1 & CSXT

LocationMuirkirk Road at US 1

RouteCounty Highway 21

CountyPrince George's County

StateMaryland

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.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionApril 2024

Inspection intervalevery 24 months

Operating statusPosted for load restriction

ScourBridge not over waterway

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

Approach roadway alignment6: Equal to present minimum criteria

Operating rating63.5 US tons

Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder

MaterialSteel Continuous

DeckConcrete, cast-in-place

Main spans4

Design loadHS 20

Structure length240 ft (73.2 m)

Longest span79 ft (24.1 m)

Deck width64 ft (19.5 m)

Roadway width52 ft (15.9 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,647 (2020)

Projected traffic35,020 by 2042

Trucks10%

Lanes on structure4

Traffic directionTwo-way traffic

CarriesHighway and pedestrian

CrossesHighway and railroad

Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry

Estimated improvement cost$2.9 million

NavigationNot applicable (no waterway)

Frequently asked questions

When was Muirkirk Road over US 1 & CSXT built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2008.

What condition is Muirkirk Road over US 1 & CSXT 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 April 2024.

How much traffic does Muirkirk Road over US 1 & CSXT carry?

About 22,647 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Muirkirk Road over US 1 & CSXT?

The structure is 240 ft (73.2 m) long with a longest span of 79 ft (24.1 m) and a deck 64 ft wide.

Who owns Muirkirk Road over US 1 & CSXT?

It is owned by the County Highway Agency.