US Bridges

US-31 Br over Hart/Mont. Linear SP Trl

Fair

Muskegon County, Michigan · In Whitehall · Structure no. 000000000007578

Built
1933
92 years old, rebuilt 2011
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Single or Spread
Steel
Length
22 ft
1 main span
Daily traffic
12,781
2007 count
Owner
State
State Highway Agency

About this bridge

US-31 Br over Hart/Mont. Linear SP Trl is a steel box beam or girders - single or spread carrying US-31 Br over Hart/Mont. Linear SP Trl in Muskegon County, Michigan. It was built in 1933 and reconstructed in 2011, so it is 92 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 12,781 vehicles a day, roughly 3% of them trucks, projected to reach 14,981 by 2018. The structure is 22 ft (6.6 m) long and 74 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS-31 Br
CrossesHart/Mont. Linear SP Trl
LocationIn Whitehall
RouteU.S. Route 31
CountyMuskegon County
StateMichigan
Coordinates43.40976, -86.34939
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.8 US tons
Inventory rating54.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadGreater than HL 93
Structure length22 ft (6.6 m)
Longest span19 ft (5.9 m)
Deck width74 ft (22.5 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,781 (2007)
Projected traffic14,981 by 2018
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesPedestrian / bicycle
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US-31 Br over Hart/Mont. Linear SP Trl built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 2011.

What condition is US-31 Br over Hart/Mont. Linear SP Trl 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 July 2023.

How much traffic does US-31 Br over Hart/Mont. Linear SP Trl carry?

About 12,781 vehicles per day (2007 count), of which roughly 3% are trucks.

How long is US-31 Br over Hart/Mont. Linear SP Trl?

The structure is 22 ft (6.6 m) long with a longest span of 19 ft (5.9 m) and a deck 74 ft wide.

Who owns US-31 Br over Hart/Mont. Linear SP Trl?

It is owned by the State Highway Agency.