US Bridges

US-23 NB M-14 WB over Mdot RR Corridor

Fair

Washtenaw County, Michigan · 0.9 MI E of W JCT M-14 · Structure no. 000000000010908

Built
1962
63 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
178 ft
3 main spans
Daily traffic
36,627
2007 count
Owner
State
State Highway Agency

About this bridge

US-23 NB M-14 WB over Mdot RR Corridor is a steel stringer/multi-beam or girder carrying US-23 NB M-14 WB over Mdot RR Corridor in Washtenaw County, Michigan. It was built in 1962, so it is 63 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 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 36,627 vehicles a day, roughly 11% of them trucks, projected to reach 41,388 by 2018. The structure is 178 ft (54.4 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS-23 NB M-14 WB
CrossesMdot RR Corridor
Location0.9 MI E of W JCT M-14
RouteU.S. Route 23
CountyWashtenaw County
StateMichigan
Coordinates42.32188, -83.73094
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 20 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.2 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length178 ft (54.4 m)
Longest span59 ft (18.1 m)
Deck width68 ft (20.7 m)
Roadway width65 ft (19.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,627 (2007)
Projected traffic41,388 by 2018
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$126,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was US-23 NB M-14 WB over Mdot RR Corridor built?

It was built in 1962, making it 63 years old in 2025.

What condition is US-23 NB M-14 WB over Mdot RR Corridor 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 November 2024.

How much traffic does US-23 NB M-14 WB over Mdot RR Corridor carry?

About 36,627 vehicles per day (2007 count), of which roughly 11% are trucks.

How long is US-23 NB M-14 WB over Mdot RR Corridor?

The structure is 178 ft (54.4 m) long with a longest span of 59 ft (18.1 m) and a deck 68 ft wide.

Who owns US-23 NB M-14 WB over Mdot RR Corridor?

It is owned by the State Highway Agency.