South Park Avenue over Mill River
Fairfield County, Connecticut · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- South Park Avenue over Mill River in Fairfield County, Connecticut, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1946, making it 79 years old at the 2025 inventory.
- It carries about 4,386 vehicles a day (traffic count year 2024).
- Its listed owner is a town or township highway agency.
- It is one of 640 of the 862 inventoried bridges in Fairfield County rated fair (74.2%); 33 (3.8%) 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 → (41.23201, -73.24857)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 5 | Fair condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Concrete slab |
| Length | about 32 ft |
| Location | 0.3 Mi N of Route 15 |
| NBI structure number | 04212 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Connecticut department of transportation.
Busiest bridges in Fairfield County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate-95 over Kings Hwy-goodwives Rv | 1952 | 154,700 | Fair |
| Interstate-95 over Bostwick Ave | 2006 | 154,600 | Fair |
| Interstate-95 over Bport Harbor Rt 130 Mnrr | 1959 | 153,100 | Fair |
| Interstate-95 over Norwalk Rv Hendricks Ave | 1957 | 147,500 | Fair |
| Interstate-95 over Route 136 | 1952 | 143,900 | Fair |
| Interstate-95 over Metro North RR & Station | 1958 | 143,300 | Fair |
All bridges nearby: Fairfield County, CT bridge conditions · every bridge in Fairfield County · Connecticut bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.