US Bridges

Tridelphia Road over Md 32

Good

Howard County, Maryland · 4.30 MI W of Md 144 · Structure no. 100000130045010

Built
2020
5 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
164 ft
2 main spans
Daily traffic
7,200
2015 count
Owner
State
State Highway Agency

About this bridge

Tridelphia Road over Md 32 is a steel continuous stringer/multi-beam or girder carrying Tridelphia Road over Md 32 in Howard County, Maryland. It was built in 2020, so it is 5 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 7,200 vehicles a day, roughly 8% of them trucks, projected to reach 11,800 by 2040. The structure is 164 ft (50 m) long and 47 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTridelphia Road
CrossesMd 32
Location4.30 MI W of Md 144
RouteCounty Highway 49
CountyHoward County
StateMaryland
Coordinates39.26403, -76.98518
Functional classRural Major Collector

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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length164 ft (50 m)
Longest span80 ft (24.4 m)
Deck width47 ft (14.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,200 (2015)
Projected traffic11,800 by 2040
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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$246,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Tridelphia Road over Md 32 built?

It was built in 2020, making it 5 years old in 2025.

What condition is Tridelphia Road over Md 32 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 May 2023.

How much traffic does Tridelphia Road over Md 32 carry?

About 7,200 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is Tridelphia Road over Md 32?

The structure is 164 ft (50 m) long with a longest span of 80 ft (24.4 m) and a deck 47 ft wide.

Who owns Tridelphia Road over Md 32?

It is owned by the State Highway Agency.