US Bridges

Norton Road over Shiawassee River Drain

FairPosted for load

Livingston County, Michigan · Marion Twp Sec 5 · Structure no. 000000000005834

Built
1959
66 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
2,390
2012 count
Owner
County
County Highway Agency

About this bridge

Norton Road over Shiawassee River Drain is a prestressed concrete box beam or girders - multiple carrying Norton Road over Shiawassee River Drain in Livingston County, Michigan. It was built in 1959, so it is 66 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. Its operating status is: posted for load restriction.

It carries about 2,390 vehicles a day, projected to reach 2,600 by 2042. The structure is 45 ft (13.7 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNorton Road
CrossesShiawassee River Drain
LocationMarion Twp Sec 5
RouteCounty Highway 4729
CountyLivingston County
StateMichigan
Coordinates42.59205, -83.99918
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.
Superstructure7 GoodSome minor problems.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50.7 US tons
Inventory rating30.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length45 ft (13.7 m)
Longest span44 ft (13.4 m)
Deck width35 ft (10.6 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,390 (2012)
Projected traffic2,600 by 2042
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 Norton Road over Shiawassee River Drain built?

It was built in 1959, making it 66 years old in 2025.

What condition is Norton Road over Shiawassee River Drain 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 Norton Road over Shiawassee River Drain carry?

About 2,390 vehicles per day (2012 count).

How long is Norton Road over Shiawassee River Drain?

The structure is 45 ft (13.7 m) long with a longest span of 44 ft (13.4 m) and a deck 35 ft wide.

Who owns Norton Road over Shiawassee River Drain?

It is owned by the County Highway Agency.