Route 9 Northbound over Route 155
Middlesex County, Connecticut · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Route 9 Northbound over Route 155 in Middlesex County, Connecticut, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1959, making it 66 years old at the 2025 inventory.
- It carries about 20,900 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 196 of the 309 inventoried bridges in Middlesex County rated fair (63.4%); 13 (4.2%) 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 6 to 7.
- Its most recent inspection on record is dated March 2024, on a 24-month routine inspection cycle.
- 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 → (41.53447, -72.61839)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 127 ft |
| Location | 2.49 Mi No of Haddam Tl |
| NBI structure number | 00629 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Connecticut department of transportation.
Busiest bridges in Middlesex County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate-91 over Falls Brook | 1965 | 108,700 | Good |
| Interstate-91 NB over Mattabesset River | 1965 | 99,500 | Fair |
| Interstate-95 over Cow Hill Road | 1957 | 62,400 | Fair |
| Interstate-95 over Route 9 NB & I-95 Tr 816 | 1992 | 62,200 | Fair |
| Route 9 over Game Area Road | 1968 | 61,300 | Good |
| Interstate-95 over Indian Lake | 1957 | 59,800 | Fair |
All bridges nearby: Middlesex County, CT bridge conditions · every bridge in Middlesex County · Connecticut bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.