US Bridges

Coates HWY FH38 over Big Manistee River

Good

Manistee County, Michigan · 8.5 Miles E of Brethern · Structure no. 000000000006452

Built
2018
7 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
212 ft
3 main spans
Daily traffic
854
2018 count
Owner
County
County Highway Agency

About this bridge

Coates HWY FH38 over Big Manistee River is a prestressed concrete box beam or girders - multiple carrying Coates HWY FH38 over Big Manistee River in Manistee County, Michigan. It was built in 2018, so it is 7 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 854 vehicles a day, roughly 10% of them trucks, projected to reach 1,000 by 2038. The structure is 212 ft (64.6 m) long and 34 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesCoates HWY FH38
CrossesBig Manistee River
Location8.5 Miles E of Brethern
RouteCounty Highway 5140
Coordinates44.28376, -85.86022
Functional classRural Major 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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating84.7 US tons
Inventory rating63.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length212 ft (64.6 m)
Longest span69 ft (21.1 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic854 (2018)
Projected traffic1,000 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 Coates HWY FH38 over Big Manistee River built?

It was built in 2018, making it 7 years old in 2025.

What condition is Coates HWY FH38 over Big Manistee River 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 May 2024.

How much traffic does Coates HWY FH38 over Big Manistee River carry?

About 854 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is Coates HWY FH38 over Big Manistee River?

The structure is 212 ft (64.6 m) long with a longest span of 69 ft (21.1 m) and a deck 34 ft wide.

Who owns Coates HWY FH38 over Big Manistee River?

It is owned by the County Highway Agency.