US Bridges

Maryland RT.458-SI over Suitland Parkway

Fair

Prince George's County, Maryland · 1.8 Miles from Suitland R · Structure no. 3564005P0000000

Built
1943
82 years old, rebuilt 1965
Condition
Fair
inspected February 2024
Type
Frame
Concrete Continuous
Length
101 ft
2 main spans
Daily traffic
42,725
2019 count
Owner
Federal
National Park Service

About this bridge

Maryland RT.458-SI over Suitland Parkway is a concrete continuous frame carrying Maryland RT.458-SI over Suitland Parkway in Prince George's County, Maryland. It was built in 1943 and reconstructed in 1965, so it is 82 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 42,725 vehicles a day, roughly 1% of them trucks, projected to reach 46,000 by 2039. The structure is 101 ft (30.9 m) long and 100 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMaryland RT.458-SI
CrossesSuitland Parkway
Location1.8 Miles from Suitland R
RouteFederal Lands Road 458
CountyPrince George's County
StateMaryland
Coordinates38.84289, -76.93206
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length101 ft (30.9 m)
Longest span44 ft (13.4 m)
Deck width100 ft (30.5 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,725 (2019)
Projected traffic46,000 by 2039
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$165,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Maryland RT.458-SI over Suitland Parkway built?

It was built in 1943, making it 82 years old in 2025. It was reconstructed in 1965.

What condition is Maryland RT.458-SI over Suitland Parkway 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 February 2024.

How much traffic does Maryland RT.458-SI over Suitland Parkway carry?

About 42,725 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Maryland RT.458-SI over Suitland Parkway?

The structure is 101 ft (30.9 m) long with a longest span of 44 ft (13.4 m) and a deck 100 ft wide.

Who owns Maryland RT.458-SI over Suitland Parkway?

It is owned by the National Park Service.