US Bridges

Old Mine Road over Pequonnock River

Good

Fairfield County, Connecticut · 100 Ft East of Route 111 · Structure no. 05298

Built
1979
46 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete Continuous
Length
35 ft
3 main spans
Daily traffic
650
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Old Mine Road over Pequonnock River is a concrete continuous culvert carrying Old Mine Road over Pequonnock River in Fairfield County, Connecticut. It was built in 1979, so it is 46 years old, younger 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 650 vehicles a day, roughly 2% of them trucks, projected to reach 966 by 2043. The structure is 35 ft (10.7 m) long and 49 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesOld Mine Road
CrossesPequonnock River
Location100 Ft East of Route 111
RouteCity Street 0
Coordinates41.28931, -73.23397
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating19.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span11 ft (3.4 m)
Deck width49 ft (14.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2023)
Projected traffic966 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

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

Frequently asked questions

When was Old Mine Road over Pequonnock River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Old Mine Road over Pequonnock 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 December 2023.

How much traffic does Old Mine Road over Pequonnock River carry?

About 650 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Old Mine Road over Pequonnock River?

The structure is 35 ft (10.7 m) long with a longest span of 11 ft (3.4 m) and a deck 49 ft wide.

Who owns Old Mine Road over Pequonnock River?

It is owned by the Town or Township Highway Agency.