ST110 SB SMTH RTY
Carrying ST110 SB SMTH RTY over HWY LOWELL-LWRNCE BLVD
WEST BRIDGE SMITH RTY, Middlesex, Massachusetts
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: ST110 SB SMTH RTY
The ST110 SB SMTH RTY bridge in Middlesex, Massachusetts carries ST110 SB SMTH RTY over HWY LOWELL-LWRNCE BLVD. It was built in 1954, making it 72 years old today. It was last reconstructed in 2012, extending its service life. The structure is built primarily of steel and spans 3 sections, stretching 45.4 meters (149 feet) end to end. Daily traffic averages 5,690 vehicles, placing it in the moderately-trafficked tier of Massachusetts bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 5/9, substructure at 4/9. The weakest component sits in poor condition. At least one major component here scores 4 or below, which produces a Poor condition classification under FHWA's current reporting rules. Its NBI inventory load rating is 40.6 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How ST110 SB SMTH RTY 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 How the historical reference is calculated.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
- 1954
- Last Reconstructed
- 2012
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 45.4 m (149 ft)
- Deck Width
- 14.6 m (48 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 5,690 vehicles/day
- Structure Number
- L150602PCDOTNBI
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • The deck (driving surface) rates good at 7/9, with no significant deterioration on file.
- • The superstructure (beams and supports above the deck) is in fair condition (5/9), with minor deterioration that may require routine maintenance.
- • The substructure (piers and abutments) is in poor condition (4/9), showing advanced deterioration that may require priority repair.
How to read this record
ST110 SB SMTH RTY is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare ST110 SB SMTH RTY against other structures in Middlesex 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 ST110 SB SMTH RTY?
ST110 SB SMTH RTY in Middlesex, Massachusetts has a deck rating of 7/9, superstructure rating of 5/9, and substructure rating of 4/9 on the FHWA's 0–9 scale.
How often is ST110 SB SMTH RTY inspected?
ST110 SB SMTH RTY'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 5,690 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. ST110 SB SMTH RTY is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for ST110 SB SMTH RTY?
ST110 SB SMTH RTY has an NBI inventory load rating of 40.6 metric tons.
Who is responsible for maintaining ST110 SB SMTH RTY?
ST110 SB SMTH RTY is owned and maintained by State Highway Agency.
How old is ST110 SB SMTH RTY and does age affect safety?
ST110 SB SMTH RTY was built in 1954, making it 72 years old and last reconstructed in 2012.
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.