US Bridges

Mill Hill Road over Metro North Railroad

Fair

Fairfield County, Connecticut · 100 Ft N of US Te 1 · Structure no. 04354

Built
1982
43 years old
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
83 ft
1 main span
Daily traffic
4,700
2022 count
Owner
Unknown
Unknown

About this bridge

Mill Hill Road over Metro North Railroad is a prestressed concrete box beam or girders - multiple carrying Mill Hill Road over Metro North Railroad in Fairfield County, Connecticut. It was built in 1982, so it is 43 years old, younger than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,700 vehicles a day, roughly 5% of them trucks, projected to reach 6,984 by 2042. The structure is 83 ft (25.3 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMill Hill Road
CrossesMetro North Railroad
Location100 Ft N of US Te 1
RouteCity Street 0
Coordinates41.14016, -73.27979
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.3 US tons
Inventory rating26.5 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span77 ft (23.5 m)
Deck width54 ft (16.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,700 (2022)
Projected traffic6,984 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerUnknown
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mill Hill Road over Metro North Railroad built?

It was built in 1982, making it 43 years old in 2025.

What condition is Mill Hill Road over Metro North Railroad in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2024.

How much traffic does Mill Hill Road over Metro North Railroad carry?

About 4,700 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Mill Hill Road over Metro North Railroad?

The structure is 83 ft (25.3 m) long with a longest span of 77 ft (23.5 m) and a deck 54 ft wide.

Who owns Mill Hill Road over Metro North Railroad?

It is owned by the Unknown and maintained by the State Highway Agency.