US Bridges

Route 108 over Farmill River

Fair

Fairfield County, Connecticut · 3.4 MI N. of Route 15 · Structure no. 01306

Built
1932
93 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
3,250
2024 count
Owner
State
State Highway Agency

About this bridge

Route 108 over Farmill River is a concrete slab carrying Route 108 over Farmill River in Fairfield County, Connecticut. It was built in 1932, so it is 93 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 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 3,250 vehicles a day, roughly 3% of them trucks, projected to reach 4,829 by 2044. The structure is 24 ft (7.3 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRoute 108
CrossesFarmill River
Location3.4 MI N. of Route 15
RouteState Highway 108
Coordinates41.28383, -73.15549
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59 US tons
Inventory rating35.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length24 ft (7.3 m)
Longest span20 ft (6.1 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,250 (2024)
Projected traffic4,829 by 2044
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

OwnerState Highway Agency
Maintained byState 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 Route 108 over Farmill River built?

It was built in 1932, making it 93 years old in 2025.

What condition is Route 108 over Farmill River 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 July 2024.

How much traffic does Route 108 over Farmill River carry?

About 3,250 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Route 108 over Farmill River?

The structure is 24 ft (7.3 m) long with a longest span of 20 ft (6.1 m) and a deck 23 ft wide.

Who owns Route 108 over Farmill River?

It is owned by the State Highway Agency.