US Bridges

Basin Main Road over Mad River

Fair

Litchfield County, Connecticut · Old Route 44 · Structure no. 06379

Built
1940
85 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
45 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 concrete tee beam 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 45 ft (13.8 m) long and 41 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesBasin Main Road
CrossesMad River
LocationOld Route 44
RouteState Lands Road 0
CountyLitchfield County
StateConnecticut
Coordinates41.93471, -73.09761
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.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating47 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length45 ft (13.8 m)
Longest span43 ft (13.1 m)
Deck width41 ft (12.6 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42 (2023)
Projected traffic62 by 2043
Trucks—
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 45 ft (13.8 m) long with a longest span of 43 ft (13.1 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.