US Bridges

Long Lake RD over Flat River

Good

Ionia County, Michigan · .8 MI East of Belding · Structure no. 000000000004034

Built
2014
11 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
105 ft
1 main span
Daily traffic
1,367
2016 count
Owner
County
County Highway Agency

About this bridge

Long Lake RD over Flat River is a prestressed concrete box beam or girders - single or spread carrying Long Lake RD over Flat River in Ionia County, Michigan. It was built in 2014, so it is 11 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,367 vehicles a day, roughly 6% of them trucks, projected to reach 1,376 by 2036. The structure is 105 ft (32 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLong Lake RD
CrossesFlat River
Location.8 MI East of Belding
RouteCounty Highway 3498
Coordinates43.1094, -85.21152
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating91.8 US tons
Inventory rating48.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length105 ft (32 m)
Longest span102 ft (31.1 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,367 (2016)
Projected traffic1,376 by 2036
Trucks6%
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 Long Lake RD over Flat River built?

It was built in 2014, making it 11 years old in 2025.

What condition is Long Lake RD over Flat 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 October 2023.

How much traffic does Long Lake RD over Flat River carry?

About 1,367 vehicles per day (2016 count), of which roughly 6% are trucks.

How long is Long Lake RD over Flat River?

The structure is 105 ft (32 m) long with a longest span of 102 ft (31.1 m) and a deck 37 ft wide.

Who owns Long Lake RD over Flat River?

It is owned by the County Highway Agency.