Route 34 over Eight Mile Brook
New Haven County, Connecticut · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Route 34 over Eight Mile Brook in New Haven County, Connecticut, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 1924, making it 101 years old at the 2025 inventory.
- It carries about 9,800 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 275 of the 893 inventoried bridges in New Haven County rated good (30.8%); 33 (3.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, temporary structure in place to carry legal loads while the original structure is closed awaiting replacement or rehabilitation (NBI item 41).
- It was rated fair in the 2024 inventory and is now good (superstructure 6 to 8, substructure 6 to 8).
- Its most recent inspection on record is dated December 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 → (41.38434, -73.16412)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | – | 8 | Very good condition |
| Superstructure | 6 | 8 | Very good condition |
| Substructure | 6 | 8 | Very good condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 82 ft |
| Location | 2 Miles West of Rte 188 |
| NBI structure number | 00944 |
| Condition class | Good |
| Traffic status (item 41) | Open, temporary structure in place to carry legal loads while the original structure is closed awaiting replacement or rehabilitation |
| Last inspection (item 90) | December 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
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.