US Bridges

Hackman Road over Prairie River

Fair

St. Joseph County, Michigan · 4.5 MI N of Sturgis · Structure no. 000000000010348

Built
1979
46 years old
Condition
Fair
inspected November 2023
Type
Slab
Wood or Timber
Length
66 ft
3 main spans
Daily traffic
777
2016 count
Owner
County
County Highway Agency

About this bridge

Hackman Road over Prairie River is a wood or timber slab carrying Hackman Road over Prairie River in St. Joseph County, Michigan. It was built in 1979, so it is 46 years old, younger 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 777 vehicles a day, roughly 17% of them trucks, projected to reach 825 by 2036. The structure is 66 ft (20.1 m) long and 33 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesHackman Road
CrossesPrairie River
Location4.5 MI N of Sturgis
RouteCounty Highway 0
CountySt. Joseph County
StateMichigan
Coordinates41.87608, -85.40099
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating42.2 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 20
Structure length66 ft (20.1 m)
Longest span22 ft (6.7 m)
Deck width33 ft (10.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic777 (2016)
Projected traffic825 by 2036
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Hackman Road over Prairie River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Hackman Road over Prairie 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 November 2023.

How much traffic does Hackman Road over Prairie River carry?

About 777 vehicles per day (2016 count), of which roughly 17% are trucks.

How long is Hackman Road over Prairie River?

The structure is 66 ft (20.1 m) long with a longest span of 22 ft (6.7 m) and a deck 33 ft wide.

Who owns Hackman Road over Prairie River?

It is owned by the County Highway Agency.