US Bridges

Jackson Ave over Mill Creek

Fair

Washtenaw County, Michigan · Lima Twp Section 21 · Structure no. 000000000010978

Built
1937
88 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete
Length
31 ft
1 main span
Daily traffic
5,031
2003 count
Owner
County
County Highway Agency

About this bridge

Jackson Ave over Mill Creek is a concrete tee beam carrying Jackson Ave over Mill Creek in Washtenaw County, Michigan. It was built in 1937, so it is 88 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 5,031 vehicles a day, roughly 12% of them trucks, projected to reach 9,086 by 2023. The structure is 31 ft (9.4 m) long and 66 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesJackson Ave
CrossesMill Creek
LocationLima Twp Section 21
RouteCounty Highway 8160
CountyWashtenaw County
StateMichigan
Coordinates42.29603, -83.95883
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length31 ft (9.4 m)
Longest span28 ft (8.5 m)
Deck width66 ft (20.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,031 (2003)
Projected traffic9,086 by 2023
Trucks12%
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 1937, making it 88 years old in 2025.

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 April 2023.

How much traffic does Jackson Ave over Mill Creek carry?

About 5,031 vehicles per day (2003 count), of which roughly 12% are trucks.

How long is Jackson Ave over Mill Creek?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.5 m) and a deck 66 ft wide.

Who owns Jackson Ave over Mill Creek?

It is owned by the County Highway Agency.