US Bridges

Dickerson Lake RD over Flat River

Good

Montcalm County, Michigan · 0.40 MI West of M-91 · Structure no. 000000000007516

Built
1978
47 years old, rebuilt 2023
Condition
Good
inspected May 2023
Type
Slab
Wood or Timber
Length
52 ft
2 main spans
Daily traffic
300
2021 count
Owner
County
County Highway Agency

About this bridge

Dickerson Lake RD over Flat River is a wood or timber slab carrying Dickerson Lake RD over Flat River in Montcalm County, Michigan. It was built in 1978 and reconstructed in 2023, so it is 47 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 300 vehicles a day, roughly 2% of them trucks, projected to reach 370 by 2041. The structure is 52 ft (15.8 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesDickerson Lake RD
CrossesFlat River
Location0.40 MI West of M-91
RouteCounty Highway 0
Coordinates43.29208, -85.25905
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating77.5 US tons
Inventory rating59.6 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadGreater than HL 93
Structure length52 ft (15.8 m)
Longest span25 ft (7.6 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2021)
Projected traffic370 by 2041
Trucks2%
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 Dickerson Lake RD over Flat River built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2023.

What condition is Dickerson 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 May 2023.

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

About 300 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Dickerson Lake RD over Flat River?

The structure is 52 ft (15.8 m) long with a longest span of 25 ft (7.6 m) and a deck 32 ft wide.

Who owns Dickerson Lake RD over Flat River?

It is owned by the County Highway Agency.