US Bridges

Basin Main Road over Mad River

Fair

Litchfield County, Connecticut · Old Route 44 · Structure no. 06378

Built
1940
85 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
42
2023 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Basin Main Road over Mad River is a steel stringer/multi-beam or girder carrying Basin Main Road over Mad River in Litchfield County, Connecticut. It was built in 1940, so it is 85 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 42 vehicles a day, projected to reach 62 by 2043. The structure is 55 ft (16.9 m) long and 41 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesBasin Main Road
CrossesMad River
LocationOld Route 44
RouteState Lands Road 0
Coordinates41.937, -73.1012
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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 geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating49.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length55 ft (16.9 m)
Longest span50 ft (15.2 m)
Deck width41 ft (12.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42 (2023)
Projected traffic62 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation 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 Basin Main Road over Mad River built?

It was built in 1940, making it 85 years old in 2025.

What condition is Basin Main Road over Mad 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 August 2023.

How much traffic does Basin Main Road over Mad River carry?

About 42 vehicles per day (2023 count).

How long is Basin Main Road over Mad River?

The structure is 55 ft (16.9 m) long with a longest span of 50 ft (15.2 m) and a deck 41 ft wide.

Who owns Basin Main Road over Mad River?

It is owned by the State Park, Forest, or Reservation Agency.