US Bridges

Ridge Road over US 29 Ramp H (4)

Fair

Howard County, Maryland · 0.28 Mile East of US 29 · Structure no. 100000130015010

Built
1966
59 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
115 ft
3 main spans
Daily traffic
5,121
2009 count
Owner
State
State Highway Agency

About this bridge

Ridge Road over US 29 Ramp H (4) is a steel stringer/multi-beam or girder carrying Ridge Road over US 29 Ramp H (4) in Howard County, Maryland. It was built in 1966, so it is 59 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 5,121 vehicles a day, roughly 5% of them trucks, projected to reach 3,242 by 2026. The structure is 115 ft (35.1 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRidge Road
CrossesUS 29 Ramp H (4)
Location0.28 Mile East of US 29
RouteCounty Highway 46
CountyHoward County
StateMaryland
Coordinates39.27875, -76.81565
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length115 ft (35.1 m)
Longest span43 ft (13.1 m)
Deck width50 ft (15.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,121 (2009)
Projected traffic3,242 by 2026
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ridge Road over US 29 Ramp H (4) built?

It was built in 1966, making it 59 years old in 2025.

What condition is Ridge Road over US 29 Ramp H (4) 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 March 2023.

How much traffic does Ridge Road over US 29 Ramp H (4) carry?

About 5,121 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Ridge Road over US 29 Ramp H (4)?

The structure is 115 ft (35.1 m) long with a longest span of 43 ft (13.1 m) and a deck 50 ft wide.

Who owns Ridge Road over US 29 Ramp H (4)?

It is owned by the State Highway Agency.