US 29 over Patuxent River
FairMontgomery County, Maryland · On Howard CO Line · Structure no. 100000150034010
- Built
- 1954
- 71 years old, rebuilt 1985
- Condition
- Fair
- inspected October 2023
- Type
- Girder and Floorbeam System
- Steel Continuous
- Length
- 524 ft
- 4 main spans
- Daily traffic
- 57,304
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US 29 over Patuxent River is a steel continuous girder and floorbeam system carrying US 29 over Patuxent River in Montgomery County, Maryland. It was built in 1954 and reconstructed in 1985, so it is 71 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 57,304 vehicles a day, roughly 8% of them trucks, projected to reach 70,216 by 2044. The structure is 524 ft (159.7 m) long and 76 ft wide. If it were closed, the detour would be 14.9 mi (24 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 29 over Patuxent River built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1985.
What condition is US 29 over 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 over Patuxent River carry?
About 57,304 vehicles per day (2024 count), of which roughly 8% are trucks.
How long is US 29 over Patuxent River?
The structure is 524 ft (159.7 m) long with a longest span of 140 ft (42.7 m) and a deck 76 ft wide.
Who owns US 29 over Patuxent River?
It is owned by the State Highway Agency.