US Bridges

Shaw HWY over Middle Br Macon River

Fair

Lenawee County, Michigan · North of Downing HWY · Structure no. 000000000005687

Built
1985
40 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
80 ft
1 main span
Daily traffic
36
2011 count
Owner
County
County Highway Agency

About this bridge

Shaw HWY over Middle Br Macon River is a prestressed concrete box beam or girders - multiple carrying Shaw HWY over Middle Br Macon River in Lenawee County, Michigan. It was built in 1985, so it is 40 years old, younger 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 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 36 vehicles a day, projected to reach 225 by 2031. The structure is 80 ft (24.4 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesShaw HWY
CrossesMiddle Br Macon River
LocationNorth of Downing HWY
RouteCounty Highway 0
CountyLenawee County
StateMichigan
Coordinates41.9974, -83.79095
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66.4 US tons
Inventory rating39.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span78 ft (23.8 m)
Deck width31 ft (9.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36 (2011)
Projected traffic225 by 2031
Trucks0%
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 Shaw HWY over Middle Br Macon River built?

It was built in 1985, making it 40 years old in 2025.

What condition is Shaw HWY over Middle Br 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 January 2025.

How much traffic does Shaw HWY over Middle Br Macon River carry?

About 36 vehicles per day (2011 count).

How long is Shaw HWY over Middle Br Macon River?

The structure is 80 ft (24.4 m) long with a longest span of 78 ft (23.8 m) and a deck 31 ft wide.

Who owns Shaw HWY over Middle Br Macon River?

It is owned by the County Highway Agency.