I 495 SB over Water Merrimack River
Essex County, Massachusetts · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I 495 SB over Water Merrimack River in Essex County, Massachusetts, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2022, making it 3 years old at the 2025 inventory.
- It carries about 62,167 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 61 of the 397 inventoried bridges in Essex County rated good (15.4%); 66 (16.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: deck 8 to 7, superstructure 8 to 7.
- Its most recent inspection on record is dated July 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 → (42.76864, -71.12078)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 7 | Good condition |
| Superstructure | 8 | 7 | Good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 721 ft |
| Location | .4 Mi S ST110 |
| NBI structure number | H12039C33DOTNBI |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Massachusetts department of transportation.
Busiest bridges in Essex County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 93 over ST213 WB | 1959 | 186,800 | Fair |
| I 93 over Hwy Dascomb Rd | 1957 | 145,580 | Fair |
| I 93 over ST213 EB | 1959 | 144,946 | Fair |
| I 95 /ST128 over I 95 Ramp J | 1988 | 144,936 | Fair |
| I 95 /ST128 over Hwy Main St | 1948 | 143,473 | Fair |
| US 1 Newbrprt Tpk over I 95 /ST128 | 1963 | 140,655 | Poor |
All bridges nearby: Essex County, MA bridge conditions · every bridge in Essex County · Massachusetts bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.