US Bridges

Silvermine Road over US Route 7 & Still River

Fair

Fairfield County, Connecticut · 0.9 MI N of Route 133 · Structure no. 03929

Built
1976
49 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
670 ft
4 main spans
Daily traffic
6,700
2010 count
Owner
State
State Highway Agency

About this bridge

Silvermine Road over US Route 7 & Still River is a steel continuous stringer/multi-beam or girder carrying Silvermine Road over US Route 7 & Still River in Fairfield County, Connecticut. It was built in 1976, so it is 49 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 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 6,700 vehicles a day, roughly 4% of them trucks, projected to reach 9,956 by 2030. The structure is 670 ft (204.2 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSilvermine Road
CrossesUS Route 7 & Still River
Location0.9 MI N of Route 133
RouteCity Street 0
CountyFairfield County
StateConnecticut
Coordinates41.46773, -73.40355
Functional classUrban Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating57.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length670 ft (204.2 m)
Longest span174 ft (53 m)
Deck width52 ft (16 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,700 (2010)
Projected traffic9,956 by 2030
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed1.2 mi (2 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 Silvermine Road over US Route 7 & Still River built?

It was built in 1976, making it 49 years old in 2025.

What condition is Silvermine Road over US Route 7 & Still 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 March 2023.

How much traffic does Silvermine Road over US Route 7 & Still River carry?

About 6,700 vehicles per day (2010 count), of which roughly 4% are trucks.

How long is Silvermine Road over US Route 7 & Still River?

The structure is 670 ft (204.2 m) long with a longest span of 174 ft (53 m) and a deck 52 ft wide.

Who owns Silvermine Road over US Route 7 & Still River?

It is owned by the State Highway Agency.