QUINNIPIAC STREET
Carrying QUINNIPIAC STREET over QUINNIPIAC RIVER
150 FT E. OF ROUTE 15, Unknown County, Connecticut
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
QUINNIPIAC STREET in Unknown County, Connecticut sits above 2% of rated Connecticut bridges on inventory load rating (18 t), while its 1938 build year is earlier than 86% of Unknown County's recorded-year cohort (893 bridges).
QUINNIPIAC STREET in Unknown County, Connecticut is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1938, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 5. The lowest applicable rating sets the federal condition category, so this Fair result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure CT:03734
PRE-1950 · PRESTRESS · MULTI-SPAN · TIED-CTRL · HEAVY-ADT · LIGHT-LOAD · CAT-FAIR
- PRE-1950 Pre-1950
- PRESTRESS Prestressed concrete
- MULTI-SPAN 2 spans
- TIED-CTRL Tied control
- HEAVY-ADT Heavy ADT
- LIGHT-LOAD Light load
- CAT-FAIR Fair
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: QUINNIPIAC STREET
The QUINNIPIAC STREET bridge in Unknown County, Connecticut carries QUINNIPIAC STREET over QUINNIPIAC RIVER. It was built in 1938, making it 88 years old today. It was last reconstructed in 1996, extending its service life. The structure is built primarily of prestressed concrete and spans 2 sections, stretching 38.4 meters (126 feet) end to end. Daily traffic averages 12,500 vehicles, placing it in the heavily-trafficked tier of Connecticut bridges. It is owned and maintained by Town/Township Highway Agency.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 5/9, substructure at 6/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range.
How QUINNIPIAC STREET compares
Age against the county: built in 1938, earlier than 771 of Unknown County's 893 bridges with a recorded construction year (86%), against a county median build year of 1965. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Connecticut bridges with a recorded inventory load rating (4,365 rated).
QUINNIPIAC STREET vs every rated Connecticut bridge
Inventory load rating (metric tons), FHWA NBI, this state
18 Top 98% higher than 2% of 4,365 bridges
rated Connecticut bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Unknown County inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 893 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1938
- Last Reconstructed
- 1996
- Material
- Prestressed Concrete
- Number of Spans
- 2
- Structure Length
- 38.4 m (126 ft)
- Deck Width
- 14.8 m (49 ft)
- Owner
- Town/Township Highway Agency
- Avg Daily Traffic
- 12,500 vehicles/day
- Structure Number
- 03734
Condition Analysis
- • At 5/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • At 5/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether QUINNIPIAC STREET 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 QUINNIPIAC STREET against other structures in Unknown County and across Connecticut. Connecticut 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 QUINNIPIAC STREET?
QUINNIPIAC STREET in Unknown County, Connecticut has a deck rating of 5/9, superstructure rating of 5/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is QUINNIPIAC STREET inspected?
QUINNIPIAC STREET'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 12,500 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. QUINNIPIAC STREET 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 QUINNIPIAC STREET?
QUINNIPIAC STREET has an NBI inventory load rating of 18.1 metric tons.
Who is responsible for maintaining QUINNIPIAC STREET?
QUINNIPIAC STREET is owned and maintained by Town/Township Highway Agency.
How old is QUINNIPIAC STREET and does age affect safety?
QUINNIPIAC STREET was built in 1938, making it 88 years old and last reconstructed in 1996.
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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.