US Bridges

Mill Street over So Branch Raisin River

FairPosted for load

Jackson County, Michigan · 0.10 MI E of M-50 · Structure no. 000000000004532

Built
1925
100 years old, rebuilt 1984
Condition
Fair
inspected May 2023
Type
Arch - Deck
Masonry
Length
35 ft
3 main spans
Daily traffic
600
1986 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mill Street over So Branch Raisin River is a masonry arch - deck carrying Mill Street over So Branch Raisin River in Jackson County, Michigan. It was built in 1925 and reconstructed in 1984, so it is 100 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. Its operating status is: posted for load restriction.

It carries about 600 vehicles a day, roughly 10% of them trucks, projected to reach 1,100 by 2010. The structure is 35 ft (10.6 m) long and 26 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesMill Street
CrossesSo Branch Raisin River
Location0.10 MI E of M-50
RouteCity Street 1404
CountyJackson County
StateMichigan
Coordinates42.11001, -84.24566
Functional classRural Minor 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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans3
Design loadH 15
Structure length35 ft (10.6 m)
Longest span8 ft (2.4 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (1986)
Projected traffic1,100 by 2010
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Street over So Branch Raisin River built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1984.

What condition is Mill Street over So Branch Raisin River 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 May 2023.

How much traffic does Mill Street over So Branch Raisin River carry?

About 600 vehicles per day (1986 count), of which roughly 10% are trucks.

How long is Mill Street over So Branch Raisin River?

The structure is 35 ft (10.6 m) long with a longest span of 8 ft (2.4 m) and a deck 26 ft wide.

Who owns Mill Street over So Branch Raisin River?

It is owned by the City or Municipal Highway Agency.