US Bridges

Lehring RD over Shiawassee River

PoorPosted for load

Shiawassee County, Michigan · 3.5 MI NW of Byron · Structure no. 000000000009832

Built
1975
50 years old
Condition
Poor
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
120 ft
2 main spans
Daily traffic
360
1998 count
Owner
County
County Highway Agency

About this bridge

Lehring RD over Shiawassee River is a prestressed concrete box beam or girders - multiple carrying Lehring RD over Shiawassee River in Shiawassee County, Michigan. It was built in 1975, so it is 50 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 360 vehicles a day, roughly 5% of them trucks, projected to reach 650 by 2018. The structure is 120 ft (36.5 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLehring RD
CrossesShiawassee River
Location3.5 MI NW of Byron
RouteCounty Highway 0
Coordinates42.84012, -84.00967
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.4 US tons
Inventory rating27.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length120 ft (36.5 m)
Longest span57 ft (17.3 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic360 (1998)
Projected traffic650 by 2018
Trucks5%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lehring RD over Shiawassee River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Lehring RD over Shiawassee River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does Lehring RD over Shiawassee River carry?

About 360 vehicles per day (1998 count), of which roughly 5% are trucks.

How long is Lehring RD over Shiawassee River?

The structure is 120 ft (36.5 m) long with a longest span of 57 ft (17.3 m) and a deck 27 ft wide.

Who owns Lehring RD over Shiawassee River?

It is owned by the County Highway Agency.