US Bridges

US-23 Ent Ramp B over Under M-14(OV US-23 Nb)

Fair

Washtenaw County, Michigan · E JCT M-14 (over US 23 NB · Structure no. 000000000010913

Built
1964
61 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
3 main spans
Daily traffic
2,700
1993 count
Owner
State
State Highway Agency

About this bridge

US-23 Ent Ramp B over Under M-14(OV US-23 Nb) is a steel stringer/multi-beam or girder carrying US-23 Ent Ramp B over Under M-14(OV US-23 Nb) in Washtenaw County, Michigan. It was built in 1964, so it is 61 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 2,700 vehicles a day, roughly 3% of them trucks, projected to reach 3,105 by 2013. The structure is 120 ft (36.5 m) long and 33 ft wide.

Location

Open in Google Maps
CarriesUS-23 Ent Ramp B
CrossesUnder M-14(OV US-23 Nb)
LocationE JCT M-14 (over US 23 NB
RouteState Highway 14
CountyWashtenaw County
StateMichigan
Coordinates42.32261, -83.69012
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionAugust 2024
Inspection intervalevery 24 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.3 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.5 m)
Longest span48 ft (14.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic2,700 (1993)
Projected traffic3,105 by 2013
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 US-23 Ent Ramp B over Under M-14(OV US-23 Nb) built?

It was built in 1964, making it 61 years old in 2025.

What condition is US-23 Ent Ramp B over Under M-14(OV US-23 Nb) 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 2024.

How much traffic does US-23 Ent Ramp B over Under M-14(OV US-23 Nb) carry?

About 2,700 vehicles per day (1993 count), of which roughly 3% are trucks.

How long is US-23 Ent Ramp B over Under M-14(OV US-23 Nb)?

The structure is 120 ft (36.5 m) long with a longest span of 48 ft (14.6 m) and a deck 33 ft wide.

Who owns US-23 Ent Ramp B over Under M-14(OV US-23 Nb)?

It is owned by the State Highway Agency.