US Bridges

Swan Drive over Swan Channel

PoorPosted for load

Wayne County, Michigan · Grosse Ile W/S Pointe DR · Structure no. 000000000012272

Built
1956
69 years old
Condition
Poor
inspected March 2025
Type
Truss - Thru
Steel
Length
88 ft
1 main span
Daily traffic
200
1987 count
Owner
County
County Highway Agency

About this bridge

Swan Drive over Swan Channel is a steel truss - thru carrying Swan Drive over Swan Channel in Wayne County, Michigan. It was built in 1956, so it is 69 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 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 200 vehicles a day, roughly 1% of them trucks, projected to reach 210 by 2015. The structure is 88 ft (26.8 m) long and 25 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSwan Drive
CrossesSwan Channel
LocationGrosse Ile W/S Pointe DR
RouteCounty Highway 0
Coordinates42.10064, -83.17326
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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2025
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+1 approach)
Design loadH 15
Structure length88 ft (26.8 m)
Longest span80 ft (24.3 m)
Deck width25 ft (7.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (1987)
Projected traffic210 by 2015
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Swan Drive over Swan Channel built?

It was built in 1956, making it 69 years old in 2025.

What condition is Swan Drive over Swan Channel 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 March 2025.

How much traffic does Swan Drive over Swan Channel carry?

About 200 vehicles per day (1987 count), of which roughly 1% are trucks.

How long is Swan Drive over Swan Channel?

The structure is 88 ft (26.8 m) long with a longest span of 80 ft (24.3 m) and a deck 25 ft wide.

Who owns Swan Drive over Swan Channel?

It is owned by the County Highway Agency.