US Bridges

Castle Road over North Br Flint River

Good

Lapeer County, Michigan · SEC.31 Burlington Twp · Structure no. 000000000005397

Built
2011
14 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
182
2020 count
Owner
County
County Highway Agency

About this bridge

Castle Road over North Br Flint River is a prestressed concrete stringer/multi-beam or girder carrying Castle Road over North Br Flint River in Lapeer County, Michigan. It was built in 2011, so it is 14 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 182 vehicles a day, roughly 3% of them trucks, projected to reach 222 by 2040. The structure is 58 ft (17.7 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCastle Road
CrossesNorth Br Flint River
LocationSEC.31 Burlington Twp
RouteCounty Highway 0
CountyLapeer County
StateMichigan
Coordinates43.23791, -83.22343
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating70.3 US tons
Inventory rating54.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length58 ft (17.7 m)
Longest span56 ft (17.1 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic182 (2020)
Projected traffic222 by 2040
Trucks3%
Lanes on structure2
Traffic directionOne-lane bridge for two-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 Castle Road over North Br Flint River built?

It was built in 2011, making it 14 years old in 2025.

What condition is Castle Road over North Br Flint 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 September 2023.

How much traffic does Castle Road over North Br Flint River carry?

About 182 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Castle Road over North Br Flint River?

The structure is 58 ft (17.7 m) long with a longest span of 56 ft (17.1 m) and a deck 29 ft wide.

Who owns Castle Road over North Br Flint River?

It is owned by the County Highway Agency.