US Bridges

8 MI RD over US-23

Fair

Washtenaw County, Michigan · At Livingston CO Line · Structure no. 000000000010885

Built
2017
8 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
177 ft
2 main spans
Daily traffic
7,650
2017 count
Owner
State
State Highway Agency

About this bridge

8 MI RD over US-23 is a prestressed concrete stringer/multi-beam or girder carrying 8 MI RD over US-23 in Washtenaw County, Michigan. It was built in 2017, so it is 8 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 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 7,650 vehicles a day, roughly 4% of them trucks, projected to reach 8,125 by 2037. The structure is 177 ft (54.1 m) long and 47 ft wide.

Carries8 MI RD
CrossesUS-23
LocationAt Livingston CO Line
RouteCounty Highway 8192
Coordinates42.42873, -83.7669
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating74.6 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length177 ft (54.1 m)
Longest span86 ft (26.3 m)
Deck width47 ft (14.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,650 (2017)
Projected traffic8,125 by 2037
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 8 MI RD over US-23 built?

It was built in 2017, making it 8 years old in 2025.

What condition is 8 MI RD over US-23 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 October 2023.

How much traffic does 8 MI RD over US-23 carry?

About 7,650 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is 8 MI RD over US-23?

The structure is 177 ft (54.1 m) long with a longest span of 86 ft (26.3 m) and a deck 47 ft wide.

Who owns 8 MI RD over US-23?

It is owned by the State Highway Agency.