Hwy Box Mill Rd over Water Elizabeth Brook
Middlesex County, Massachusetts · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Hwy Box Mill Rd over Water Elizabeth Brook in Middlesex County, Massachusetts, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1900 and reconstructed in 1966, making it 125 years old at the 2025 inventory.
- It carries about 10 vehicles a day (traffic count year 2022).
- Its listed owner is a town or township highway agency.
- It is one of 91 of the 821 inventoried bridges in Middlesex County rated poor (11.1%); 91 (11.1%) 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).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated June 2024, on a 12-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 2): scour critical: extensive scour observed, foundations unstable.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.43182, -71.50253)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 3 | 3 | Serious condition |
Bridge details
| Structure | Concrete slab |
| Length | about 46 ft |
| Location | 60M N of Brksd Ave |
| NBI structure number | S29011265MUNNBI |
| Condition class | Poor |
| 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) | June 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 2: scour critical: extensive scour observed, foundations unstable |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Massachusetts department of transportation.
Busiest bridges in Middlesex County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 93 over St 60 Eb/salem St | 1961 | 266,500 | Fair |
| I 93 over St 60 Wb/salem St | 1961 | 266,500 | Fair |
| I 93 over Water Mystic River | 1963 | 250,350 | Fair |
| I 93 over Hwy Valley St & Fllswy | 1961 | 210,316 | Fair |
| I 93 over Hwy Montvale Ave | 1958 | 208,231 | Fair |
| I 93 over I 95 /ST128 | 1957 | 200,824 | Poor |
All bridges nearby: Middlesex County, MA bridge conditions · every bridge in Middlesex County · Massachusetts bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.