Sumner Lake Blvd. over Flat Branch Trib.
Manassas city, Virginia · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sumner Lake Blvd. over Flat Branch Trib. in Manassas city, Virginia, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 2001, making it 24 years old at the 2025 inventory.
- It carries about 1,000 vehicles a day (traffic count year 2003).
- Its listed owner is a city or municipal highway agency.
- It is one of 5 of the 13 inventoried bridges in Manassas city rated good (38.5%); 0 (0.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now good (culvert 6 to 7).
- Its most recent inspection on record is dated February 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (38.77624, -77.47782)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 34 ft |
| Location | 00.03 From Gaither St. |
| NBI structure number | 000000000027622 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Virginia department of transportation.
Busiest bridges in Manassas city
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Liberia Ave. over NS Railway | 1996 | 35,524 | Good |
| Nokesville Rd. over Cannon Branch | 1990 | 29,042 | Good |
| Sudley Road over Flat Branch | 1970 | 25,073 | Fair |
| 28 Nokeville Rd. over Wellington & Railroad | 2012 | 21,554 | Fair |
| Godwin Drive over Cannon Br | 1964 | 17,351 | Fair |
| Wellington Road over Winter Branch | 1988 | 16,557 | Fair |
All bridges nearby: Manassas city, VA bridge conditions · every bridge in Manassas city · Virginia bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.