US Bridges

River Bank Road over East Branch Mianus River

Good

Fairfield County, Connecticut · 0.8 MI N of Route 15 · Structure no. 04071

Built
1957
68 years old, rebuilt 2024
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
1,500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

River Bank Road over East Branch Mianus River is a steel stringer/multi-beam or girder carrying River Bank Road over East Branch Mianus River in Fairfield County, Connecticut. It was built in 1957 and reconstructed in 2024, so it is 68 years old, older than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,500 vehicles a day, roughly 3% of them trucks, projected to reach 2,229 by 2043. The structure is 62 ft (18.8 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesRiver Bank Road
CrossesEast Branch Mianus River
Location0.8 MI N of Route 15
RouteCity Street 0
Coordinates41.11093, -73.58768
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating46.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length62 ft (18.8 m)
Longest span59 ft (18 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2023)
Projected traffic2,229 by 2043
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was River Bank Road over East Branch Mianus River built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2024.

What condition is River Bank Road over East Branch Mianus River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does River Bank Road over East Branch Mianus River carry?

About 1,500 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is River Bank Road over East Branch Mianus River?

The structure is 62 ft (18.8 m) long with a longest span of 59 ft (18 m) and a deck 32 ft wide.

Who owns River Bank Road over East Branch Mianus River?

It is owned by the City or Municipal Highway Agency.