US Bridges

Naubuc Avenue over Porter Brook

Fair

Hartford County, Connecticut · 100-FT No. Putnam Blvd · Structure no. 03671

Built
1871
154 years old
Condition
Fair
inspected May 2023
Type
Arch - Deck
Masonry
Length
20 ft
1 main span
Daily traffic
3,600
2018 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Naubuc Avenue over Porter Brook is a masonry arch - deck carrying Naubuc Avenue over Porter Brook in Hartford County, Connecticut. It was built in 1871, so it is 154 years old, older 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 6 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 3,600 vehicles a day, roughly 3% of them trucks, projected to reach 5,349 by 2038. The structure is 20 ft (6.2 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNaubuc Avenue
CrossesPorter Brook
Location100-FT No. Putnam Blvd
RouteCity Street 0
CountyHartford County
StateConnecticut
Coordinates41.72443, -72.62646
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length20 ft (6.2 m)
Longest span20 ft (6.2 m)
Deck width24 ft (7.3 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (2018)
Projected traffic5,349 by 2038
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Naubuc Avenue over Porter Brook built?

It was built in 1871, making it 154 years old in 2025.

What condition is Naubuc Avenue over Porter Brook 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 May 2023.

How much traffic does Naubuc Avenue over Porter Brook carry?

About 3,600 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is Naubuc Avenue over Porter Brook?

The structure is 20 ft (6.2 m) long with a longest span of 20 ft (6.2 m) and a deck 24 ft wide.

Who owns Naubuc Avenue over Porter Brook?

It is owned by the Town or Township Highway Agency.