US Bridges

104th Avenue over No Br Pentwater River

Fair

Oceana County, Michigan · 0.5 MI N of Adams RD · Structure no. 000000000008406

Built
1986
39 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
150
1998 count
Owner
County
County Highway Agency

About this bridge

104th Avenue over No Br Pentwater River is a prestressed concrete box beam or girders - multiple carrying 104th Avenue over No Br Pentwater River in Oceana County, Michigan. It was built in 1986, so it is 39 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 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 150 vehicles a day, roughly 5% of them trucks, projected to reach 200 by 2008. The structure is 70 ft (21.3 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries104th Avenue
CrossesNo Br Pentwater River
Location0.5 MI N of Adams RD
RouteCounty Highway 0
CountyOceana County
StateMichigan
Coordinates43.81042, -86.29829
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length70 ft (21.3 m)
Longest span70 ft (21.3 m)
Deck width31 ft (9.6 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (1998)
Projected traffic200 by 2008
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 104th Avenue over No Br Pentwater River built?

It was built in 1986, making it 39 years old in 2025.

What condition is 104th Avenue over No Br Pentwater 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 August 2024.

How much traffic does 104th Avenue over No Br Pentwater River carry?

About 150 vehicles per day (1998 count), of which roughly 5% are trucks.

How long is 104th Avenue over No Br Pentwater River?

The structure is 70 ft (21.3 m) long with a longest span of 70 ft (21.3 m) and a deck 31 ft wide.

Who owns 104th Avenue over No Br Pentwater River?

It is owned by the County Highway Agency.