US Bridges

Hammett Road over US-31

Fair

Oceana County, Michigan · 1 Mile E of Pentwater · Structure no. 000000000008356

Built
1979
46 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
430 ft
5 main spans
Daily traffic
525
2018 count
Owner
State
State Highway Agency

About this bridge

Hammett Road over US-31 is a steel stringer/multi-beam or girder carrying Hammett Road over US-31 in Oceana 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 525 vehicles a day, roughly 3% of them trucks, projected to reach 604 by 2038. The structure is 430 ft (131.1 m) long and 42 ft wide.

Location

Open in Google Maps
CarriesHammett Road
CrossesUS-31
Location1 Mile E of Pentwater
RouteCounty Highway 64
CountyOceana County
StateMichigan
Coordinates43.78331, -86.40154
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length430 ft (131.1 m)
Longest span122 ft (37.2 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic525 (2018)
Projected traffic604 by 2038
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$388,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Hammett Road over US-31 built?

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

What condition is Hammett Road over US-31 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 Hammett Road over US-31 carry?

About 525 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is Hammett Road over US-31?

The structure is 430 ft (131.1 m) long with a longest span of 122 ft (37.2 m) and a deck 42 ft wide.

Who owns Hammett Road over US-31?

It is owned by the State Highway Agency.