US Bridges

Fish Lake RD over Shiawassee River

Good

Oakland County, Michigan · Holly Twp Sec 29/28 · Structure no. 000000000014123

Built
2022
3 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete
Length
31 ft
1 main span
Daily traffic
3,780
2021 count
Owner
County
County Highway Agency

About this bridge

Fish Lake RD over Shiawassee River is a concrete culvert carrying Fish Lake RD over Shiawassee River in Oakland County, Michigan. It was built in 2022, so it is 3 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 3,780 vehicles a day, roughly 5% of them trucks, projected to reach 4,180 by 2041. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFish Lake RD
CrossesShiawassee River
LocationHolly Twp Sec 29/28
RouteCounty Highway 6309
Coordinates42.79897, -83.64772
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating56.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadGreater than HL 93
Structure length31 ft (9.4 m)
Longest span31 ft (9.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,780 (2021)
Projected traffic4,180 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Fish Lake RD over Shiawassee River built?

It was built in 2022, making it 3 years old in 2025.

What condition is Fish Lake RD over Shiawassee 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 June 2024.

How much traffic does Fish Lake RD over Shiawassee River carry?

About 3,780 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Fish Lake RD over Shiawassee River?

The structure is 31 ft (9.4 m) long with a longest span of 31 ft (9.4 m).

Who owns Fish Lake RD over Shiawassee River?

It is owned by the County Highway Agency.