US Bridges

Mission Road over Ann Arbor Railroad

Good

Isabella County, Michigan · 0.1M N SE Cor Sec 27 T14N · Structure no. 000000000004309

Built
2005
20 years old
Condition
Good
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
9,200
2004 count
Owner
County
County Highway Agency

About this bridge

Mission Road over Ann Arbor Railroad is a prestressed concrete box beam or girders - multiple carrying Mission Road over Ann Arbor Railroad in Isabella County, Michigan. It was built in 2005, so it is 20 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,200 vehicles a day, roughly 2% of them trucks, projected to reach 15,075 by 2024. The structure is 65 ft (19.7 m) long and 44 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMission Road
CrossesAnn Arbor Railroad
Location0.1M N SE Cor Sec 27 T14N
RouteCounty Highway 2024
CountyIsabella County
StateMichigan
Coordinates43.56985, -84.76732
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69.6 US tons
Inventory rating41.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length65 ft (19.7 m)
Longest span60 ft (18.2 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,200 (2004)
Projected traffic15,075 by 2024
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mission Road over Ann Arbor Railroad built?

It was built in 2005, making it 20 years old in 2025.

What condition is Mission Road over Ann Arbor Railroad in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Mission Road over Ann Arbor Railroad carry?

About 9,200 vehicles per day (2004 count), of which roughly 2% are trucks.

How long is Mission Road over Ann Arbor Railroad?

The structure is 65 ft (19.7 m) long with a longest span of 60 ft (18.2 m) and a deck 44 ft wide.

Who owns Mission Road over Ann Arbor Railroad?

It is owned by the County Highway Agency.