Saarinen Circle over Toll Plaza
Loudoun County, Virginia · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Saarinen Circle over Toll Plaza in Loudoun County, Virginia, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1961, making it 64 years old at the 2025 inventory.
- It carries about 10,000 vehicles a day (traffic count year 2024).
- It is one of 207 of the 442 inventoried bridges in Loudoun County rated fair (46.8%); 3 (0.7%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (38.95525, -77.4445)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 229 ft |
| Location | 0.2 Miles From Dulles Air |
| NBI structure number | 2100001P0000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Virginia department of transportation.
Busiest bridges in Loudoun County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Sully Road over Tributary Horsepen Run | 1963 | 184,788 | Fair |
| Sully Rd. over Cabin Branch | 1963 | 127,227 | Fair |
| Rte. 28 NB over Dulles Access Rd | 1963 | 93,735 | Fair |
| Rte. 28 SB over Dulles Access Road | 1988 | 93,735 | Good |
| Sully Road RTE.28 over Merrybrook Run | 1961 | 84,996 | Fair |
| Harry Byrd Highway over Broad Run | 1949 | 71,111 | Fair |
All bridges nearby: Loudoun County, VA bridge conditions · every bridge in Loudoun County · Virginia bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.