US Bridges

Britton HWY over Macon River

Fair

Lenawee County, Michigan · 0.2 MI South of Smith RD · Structure no. 000000000005603

Built
1963
62 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
1,035
2019 count
Owner
County
County Highway Agency

About this bridge

Britton HWY over Macon River is a prestressed concrete box beam or girders - multiple carrying Britton HWY over Macon River in Lenawee County, Michigan. It was built in 1963, so it is 62 years old, older than the Michigan average of 48.3 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 1,035 vehicles a day, roughly 4% of them trucks, projected to reach 1,750 by 2039. The structure is 44 ft (13.4 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesBritton HWY
CrossesMacon River
Location0.2 MI South of Smith RD
RouteCounty Highway 4685
CountyLenawee County
StateMichigan
Coordinates42.0195, -83.83072
Functional classRural Major Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.8 US tons
Inventory rating32.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length44 ft (13.4 m)
Longest span44 ft (13.4 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,035 (2019)
Projected traffic1,750 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Britton HWY over Macon River built?

It was built in 1963, making it 62 years old in 2025.

What condition is Britton HWY over Macon 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 February 2025.

How much traffic does Britton HWY over Macon River carry?

About 1,035 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is Britton HWY over Macon River?

The structure is 44 ft (13.4 m) long with a longest span of 44 ft (13.4 m) and a deck 28 ft wide.

Who owns Britton HWY over Macon River?

It is owned by the County Highway Agency.