ST 66 WEST ST
Carrying ST 66 WEST ST over WATER MILL RIVER
.4 MI W JCT ST 9, Hampshire, Massachusetts
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: ST 66 WEST ST
The ST 66 WEST ST bridge in Hampshire, Massachusetts carries ST 66 WEST ST over WATER MILL RIVER. It was built in 1924, making it 102 years old today. The structure is built primarily of concrete and spans 2 sections, stretching 37.5 meters (123 feet) end to end. Daily traffic averages 11,767 vehicles, placing it in the heavily-trafficked tier of Massachusetts bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show superstructure at 6/9, substructure at 6/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 70.3 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How ST 66 WEST ST compares
Live comparison across Massachusetts.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1924
- Material
- Concrete
- Number of Spans
- 2
- Structure Length
- 37.5 m (123 ft)
- Deck Width
- 11.8 m (39 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 11,767 vehicles/day
- Structure Number
- N1902111MDOTNBI
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
How to read this record
This page shows what the last federal inspection recorded, not whether ST 66 WEST ST is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare ST 66 WEST ST against other structures in Hampshire and across Massachusetts. Massachusetts bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for ST 66 WEST ST?
ST 66 WEST ST in Hampshire, Massachusetts, superstructure rating of 6/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is ST 66 WEST ST inspected?
ST 66 WEST ST's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 11,767 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. ST 66 WEST ST is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for ST 66 WEST ST?
ST 66 WEST ST has an NBI inventory load rating of 70.3 metric tons.
Who is responsible for maintaining ST 66 WEST ST?
ST 66 WEST ST is owned and maintained by State Highway Agency.
How old is ST 66 WEST ST and does age affect safety?
ST 66 WEST ST was built in 1924, making it 102 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.