I-84 Tr 811 over I-84 Tr 812 & Naugatuck
New Haven County, Connecticut · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-84 Tr 811 over I-84 Tr 812 & Naugatuck in New Haven County, Connecticut, 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 1966, making it 59 years old at the 2025 inventory.
- It carries about 11,000 vehicles a day (traffic count year 2018).
- Its listed owner is the state highway agency.
- It is one of 585 of the 893 inventoried bridges in New Haven County rated fair (65.5%); 33 (3.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: superstructure 5 to 6.
- Its most recent inspection on record is dated November 2024, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- 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 → (41.55, -73.04833)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 876 ft |
| Location | NB Rte 8 to EB 84 Exit 31 |
| NBI structure number | 03190C |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Connecticut department of transportation.
Busiest bridges in New Haven County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 95 over Canal Dock Road | 2015 | 187,800 | Good |
| Interstate-95 over West River & SR 745 | 2018 | 142,200 | Good |
| Route 71 over Sodom Brook | 2019 | 141,900 | Good |
| Interstate-91 over I-91 Ramp 002 | 1965 | 141,200 | Fair |
| Interstate-91&rt15 over Willow Brook | 1964 | 136,800 | Fair |
| Interstate-91 over Grand Avenue | 1965 | 135,400 | Fair |
All bridges nearby: New Haven County, CT bridge conditions · every bridge in New Haven County · Connecticut bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.