US Bridges

River Road over Rockburn Branch

Good

Howard County, Maryland · At Rockburn RD · Structure no. 200000HO0006010

Built
2022
3 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
250
2015 count
Owner
County
County Highway Agency

About this bridge

River Road over Rockburn Branch is a prestressed concrete stringer/multi-beam or girder carrying River Road over Rockburn Branch in Howard County, Maryland. It was built in 2022, so it is 3 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 250 vehicles a day, roughly 4% of them trucks, projected to reach 250 by 2035. The structure is 50 ft (15.1 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesRiver Road
CrossesRockburn Branch
LocationAt Rockburn RD
RouteCounty Highway 158
CountyHoward County
StateMaryland
Coordinates39.22532, -76.7193
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating78.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length50 ft (15.1 m)
Longest span45 ft (13.7 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2015)
Projected traffic250 by 2035
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was River Road over Rockburn Branch built?

It was built in 2022, making it 3 years old in 2025.

What condition is River Road over Rockburn Branch 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 February 2023.

How much traffic does River Road over Rockburn Branch carry?

About 250 vehicles per day (2015 count), of which roughly 4% are trucks.

How long is River Road over Rockburn Branch?

The structure is 50 ft (15.1 m) long with a longest span of 45 ft (13.7 m) and a deck 28 ft wide.

Who owns River Road over Rockburn Branch?

It is owned by the County Highway Agency.