US Bridges

Castle Road over North Br. Flint River

PoorPosted for load

Lapeer County, Michigan · Sec. 34 Rich Twp. · Structure no. 000000000005469

Built
1940
85 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
111 ft
3 main spans
Daily traffic
210
2019 count
Owner
County
County Highway Agency

About this bridge

Castle Road over North Br. Flint River is a steel stringer/multi-beam or girder carrying Castle Road over North Br. Flint River in Lapeer County, Michigan. It was built in 1940, so it is 85 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 210 vehicles a day, projected to reach 256 by 2039. The structure is 111 ft (33.8 m) long and 40 ft wide.

CarriesCastle Road
CrossesNorth Br. Flint River
LocationSec. 34 Rich Twp.
RouteCounty Highway 0
Coordinates43.23647, -83.29278
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating6.8 US tons
Inventory rating4 US tons

Structure

MaterialSteel
DeckOpen grating
Main spans3
Design loadH 15
Structure length111 ft (33.8 m)
Longest span39 ft (11.8 m)
Deck width40 ft (12.3 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2019)
Projected traffic256 by 2039
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 1940, making it 85 years old in 2025.

What condition is Castle Road over North Br. Flint River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

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

About 210 vehicles per day (2019 count).

How long is Castle Road over North Br. Flint River?

The structure is 111 ft (33.8 m) long with a longest span of 39 ft (11.8 m) and a deck 40 ft wide.

Who owns Castle Road over North Br. Flint River?

It is owned by the County Highway Agency.