US 29 SB over Middle Patuxent River
FairHoward County, Maryland · 1.05 Miles South of Md 32 · Structure no. 100000130013012
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 144 ft
- 3 main spans
- Daily traffic
- 52,913
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US 29 SB over Middle Patuxent River is a steel continuous stringer/multi-beam or girder carrying US 29 SB over Middle Patuxent River in Howard County, Maryland. It was built in 1970, so it is 55 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 6 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 52,913 vehicles a day, roughly 8% of them trucks, projected to reach 31,442 by 2026. The structure is 144 ft (43.9 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 29 SB over Middle Patuxent River built?
It was built in 1970, making it 55 years old in 2025.
What condition is US 29 SB over Middle Patuxent River 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 October 2023.
How much traffic does US 29 SB over Middle Patuxent River carry?
About 52,913 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is US 29 SB over Middle Patuxent River?
The structure is 144 ft (43.9 m) long with a longest span of 50 ft (15.2 m) and a deck 54 ft wide.
Who owns US 29 SB over Middle Patuxent River?
It is owned by the State Highway Agency.