US Bridges

Broadbridge Road over Marine City Dredge Cut

PoorPosted for load

St. Clair County, Michigan · Pc 191-318 Cottrellville · Structure no. 000000000010032

Built
1986
39 years old
Condition
Poor
inspected April 2024
Type
Culvert
Steel
Length
40 ft
3 main spans
Daily traffic
1,100
1994 count
Owner
County
County Highway Agency

About this bridge

Broadbridge Road over Marine City Dredge Cut is a steel culvert carrying Broadbridge Road over Marine City Dredge Cut in St. Clair County, Michigan. It was built in 1986, so it is 39 years old, younger 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 4 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 1,100 vehicles a day, roughly 5% of them trucks, projected to reach 1,200 by 2014. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesBroadbridge Road
CrossesMarine City Dredge Cut
LocationPc 191-318 Cottrellville
RouteCounty Highway 0
CountySt. Clair County
StateMichigan
Coordinates42.68478, -82.53093
Functional classRural Major Collector

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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating13.9 US tons
Inventory rating10.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length40 ft (12.2 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (1994)
Projected traffic1,200 by 2014
Trucks5%
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 Broadbridge Road over Marine City Dredge Cut built?

It was built in 1986, making it 39 years old in 2025.

What condition is Broadbridge Road over Marine City Dredge Cut 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 April 2024.

How much traffic does Broadbridge Road over Marine City Dredge Cut carry?

About 1,100 vehicles per day (1994 count), of which roughly 5% are trucks.

How long is Broadbridge Road over Marine City Dredge Cut?

The structure is 40 ft (12.2 m) long with a longest span of 10 ft (3 m).

Who owns Broadbridge Road over Marine City Dredge Cut?

It is owned by the County Highway Agency.