US Bridges

Mcnair Road over Dorsey Creek

Good

Anne Arundel County, Maryland · 0.3 KM E of Decatur Ave · Structure no. 1MD0642

Built
2011
14 years old
Condition
Good
inspected June 2023
Type
Slab
Prestressed Concrete
Length
235 ft
6 main spans
Daily traffic
4,400
2005 count
Owner
Federal
Navy / Marines

About this bridge

Mcnair Road over Dorsey Creek is a prestressed concrete slab carrying Mcnair Road over Dorsey Creek in Anne Arundel County, Maryland. It was built in 2011, so it is 14 years old, younger 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 4,400 vehicles a day, roughly 5% of them trucks, projected to reach 5,500 by 2035. The structure is 235 ft (71.5 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMcnair Road
CrossesDorsey Creek
Location0.3 KM E of Decatur Ave
CountyAnne Arundel County
StateMaryland
Coordinates38.9854, -76.48668
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating104.7 US tons
Inventory rating80.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6 (+1 approach)
Design loadHS 20 + Mod
Structure length235 ft (71.5 m)
Longest span42 ft (12.7 m)
Deck width38 ft (11.5 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2005)
Projected traffic5,500 by 2035
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNavy / Marines
Maintained byNavy / Marines
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$76,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mcnair Road over Dorsey Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Mcnair Road over Dorsey Creek 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 June 2023.

How much traffic does Mcnair Road over Dorsey Creek carry?

About 4,400 vehicles per day (2005 count), of which roughly 5% are trucks.

How long is Mcnair Road over Dorsey Creek?

The structure is 235 ft (71.5 m) long with a longest span of 42 ft (12.7 m) and a deck 38 ft wide.

Who owns Mcnair Road over Dorsey Creek?

It is owned by the Navy / Marines.