US Bridges

Otter Road over Swan Creek

Fair

Wayne County, Michigan · Huron N/Willow · Structure no. 000000000012281

Built
1996
29 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
31 ft
1 main span
Daily traffic
185
1989 count
Owner
County
County Highway Agency

About this bridge

Otter Road over Swan Creek is a prestressed concrete box beam or girders - multiple carrying Otter Road over Swan Creek in Wayne County, Michigan. It was built in 1996, so it is 29 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 185 vehicles a day, roughly 1% of them trucks, projected to reach 212 by 2015. The structure is 31 ft (9.3 m) long and 43 ft wide.

CarriesOtter Road
CrossesSwan Creek
LocationHuron N/Willow
RouteCounty Highway 0
Coordinates42.11751, -83.41134
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.5 US tons
Inventory rating63.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length31 ft (9.3 m)
Longest span27 ft (8.3 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic185 (1989)
Projected traffic212 by 2015
Trucks1%
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 Otter Road over Swan Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is Otter Road over Swan Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does Otter Road over Swan Creek carry?

About 185 vehicles per day (1989 count), of which roughly 1% are trucks.

How long is Otter Road over Swan Creek?

The structure is 31 ft (9.3 m) long with a longest span of 27 ft (8.3 m) and a deck 43 ft wide.

Who owns Otter Road over Swan Creek?

It is owned by the County Highway Agency.