US Bridges

Borglum Road over Silvermine River

Fair

Fairfield County, Connecticut · Wilton-New Canaan Tl · Structure no. 05734

Built
1988
37 years old
Condition
Fair
inspected November 2023
Type
Frame
Concrete
Length
32 ft
1 main span
Daily traffic
500
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Borglum Road over Silvermine River is a concrete frame carrying Borglum Road over Silvermine River in Fairfield County, Connecticut. It was built in 1988, so it is 37 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 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 500 vehicles a day, roughly 2% of them trucks, projected to reach 743 by 2043. The structure is 32 ft (9.8 m) long and 14 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesBorglum Road
CrossesSilvermine River
LocationWilton-New Canaan Tl
RouteCity Street 0
CountyFairfield County
StateConnecticut
Coordinates41.15976, -73.45275
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.
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 inspectionNovember 2023
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating47 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (3.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2023)
Projected traffic743 by 2043
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Borglum Road over Silvermine River built?

It was built in 1988, making it 37 years old in 2025.

What condition is Borglum Road over Silvermine 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 November 2023.

How much traffic does Borglum Road over Silvermine River carry?

About 500 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Borglum Road over Silvermine River?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 14 ft wide.

Who owns Borglum Road over Silvermine River?

It is owned by the Town or Township Highway Agency.