US Bridges

Jackson Ave over Mill Creek

Fair

Washtenaw County, Michigan · Lima Twp Section 24 · Structure no. 000000000010979

Built
1936
89 years old, rebuilt 2014
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
5,770
2012 count
Owner
County
County Highway Agency

About this bridge

Jackson Ave over Mill Creek is a steel stringer/multi-beam or girder carrying Jackson Ave over Mill Creek in Washtenaw County, Michigan. It was built in 1936 and reconstructed in 2014, so it is 89 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.

It carries about 5,770 vehicles a day, roughly 14% of them trucks, projected to reach 6,407 by 2033. The structure is 60 ft (18.3 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesJackson Ave
CrossesMill Creek
LocationLima Twp Section 24
RouteCounty Highway 8160
CountyWashtenaw County
StateMichigan
Coordinates42.29045, -83.90712
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.2 US tons
Inventory rating64.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span58 ft (17.8 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,770 (2012)
Projected traffic6,407 by 2033
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Jackson Ave over Mill Creek built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 2014.

What condition is Jackson Ave over Mill Creek 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 June 2023.

How much traffic does Jackson Ave over Mill Creek carry?

About 5,770 vehicles per day (2012 count), of which roughly 14% are trucks.

How long is Jackson Ave over Mill Creek?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.8 m) and a deck 42 ft wide.

Who owns Jackson Ave over Mill Creek?

It is owned by the County Highway Agency.