US Bridges

US 1 NB over Patuxent River

Good

Prince George's County, Maryland · On Howard CO Line · Structure no. 100000160001010

Built
1949
76 years old, rebuilt 2006
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
220 ft
3 main spans
Daily traffic
16,182
2009 count
Owner
State
State Highway Agency

About this bridge

US 1 NB over Patuxent River is a steel continuous stringer/multi-beam or girder carrying US 1 NB over Patuxent River in Prince George's County, Maryland. It was built in 1949 and reconstructed in 2006, so it is 76 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 16,182 vehicles a day, roughly 7% of them trucks, projected to reach 9,230 by 2026. The structure is 220 ft (67.1 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 1 NB
CrossesPatuxent River
LocationOn Howard CO Line
RouteU.S. Route 1
Coordinates39.10458, -76.8414
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.5 US tons
Inventory rating32 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length220 ft (67.1 m)
Longest span85 ft (25.9 m)
Deck width45 ft (13.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,182 (2009)
Projected traffic9,230 by 2026
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 US 1 NB over Patuxent River built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 2006.

What condition is US 1 NB over Patuxent River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does US 1 NB over Patuxent River carry?

About 16,182 vehicles per day (2009 count), of which roughly 7% are trucks.

How long is US 1 NB over Patuxent River?

The structure is 220 ft (67.1 m) long with a longest span of 85 ft (25.9 m) and a deck 45 ft wide.

Who owns US 1 NB over Patuxent River?

It is owned by the State Highway Agency.