VALLEY ROAD
Carrying VALLEY ROAD over MIANUS RIVER
O/ MIANUS RIVER, Unknown County, Connecticut
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
VALLEY ROAD in Unknown County, Connecticut sits above 60% of rated Connecticut bridges on inventory load rating (44 t), while its 1929 build year is earlier than 92% of Unknown County's recorded-year cohort (861 bridges).
VALLEY ROAD in Unknown County, Connecticut is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1929, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. 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:03959
PRE-1950 · PRESTRESS · SINGLE-SPAN · TIED-CTRL · ARTERIAL-ADT · HEAVY-LOAD · CAT-FAIR
- PRE-1950 Pre-1950
- PRESTRESS Prestressed concrete
- SINGLE-SPAN Single span
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial ADT
- HEAVY-LOAD Heavy 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.
Structural health score
A composite of the deck, superstructure, and substructure NBI condition ratings plus the inventory load rating, benchmarked against the full national bridge corpus, distinct from the Good/Fair/Poor category above.
Bridge Snapshot: VALLEY ROAD
The VALLEY ROAD bridge in Unknown County, Connecticut carries VALLEY ROAD over MIANUS RIVER. It was built in 1929, making it 97 years old today. It was last reconstructed in 2004, extending its service life. The structure is built primarily of prestressed concrete and spans 1 section, stretching 20.4 meters (67 feet) end to end. Daily traffic averages 1,920 vehicles, placing it in the moderately-trafficked tier of Connecticut bridges. It is owned and maintained by Town/Township Highway Agency.
The latest FHWA inspection places the weakest component in fair condition (see the full component ratings below). None of this bridge's reported major components fall into the Poor condition range.
How VALLEY ROAD compares
Age against the county: built in 1929, earlier than 796 of Unknown County's 861 bridges with a recorded construction year (92%), against a county median build year of 1962. 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).
VALLEY ROAD vs every rated Connecticut bridge
Inventory load rating (metric tons), FHWA NBI, this state
44 Top 40% higher than 60% 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 861 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
- 1929
- Last Reconstructed
- 2004
- Material
- Prestressed Concrete
- Number of Spans
- 1
- Structure Length
- 20.4 m (67 ft)
- Deck Width
- 9.6 m (31 ft)
- Owner
- Town/Township Highway Agency
- Avg Daily Traffic
- 1,920 vehicles/day
- Structure Number
- 03959
Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • At 6/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
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 VALLEY ROAD 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 VALLEY ROAD 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 VALLEY ROAD?
VALLEY ROAD in Unknown County, Connecticut has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is VALLEY ROAD inspected?
VALLEY ROAD'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 1,920 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. VALLEY ROAD 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 VALLEY ROAD?
VALLEY ROAD has an NBI inventory load rating of 43.8 metric tons.
Who is responsible for maintaining VALLEY ROAD?
VALLEY ROAD is owned and maintained by Town/Township Highway Agency.
How old is VALLEY ROAD and does age affect safety?
VALLEY ROAD was built in 1929, making it 97 years old and last reconstructed in 2004.
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.