US Bridges

Mayer Road over Smiths Creek

Fair

St. Clair County, Michigan · Sec. 30 Kimball Twp. · Structure no. 000000000010211

Built
1975
50 years old
Condition
Fair
inspected November 2023
Type
Slab
Wood or Timber
Length
32 ft
1 main span
Daily traffic
112
1994 count
Owner
County
County Highway Agency

About this bridge

Mayer Road over Smiths Creek is a wood or timber slab carrying Mayer Road over Smiths Creek in St. Clair County, Michigan. It was built in 1975, so it is 50 years old, older 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 112 vehicles a day, roughly 3% of them trucks, projected to reach 200 by 2014. The structure is 32 ft (9.8 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMayer Road
CrossesSmiths Creek
LocationSec. 30 Kimball Twp.
RouteCounty Highway 0
CountySt. Clair County
StateMichigan
Coordinates42.9284, -82.62119
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating51.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width33 ft (10.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112 (1994)
Projected traffic200 by 2014
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Mayer Road over Smiths Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Mayer Road over Smiths 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 November 2023.

How much traffic does Mayer Road over Smiths Creek carry?

About 112 vehicles per day (1994 count), of which roughly 3% are trucks.

How long is Mayer Road over Smiths Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 33 ft wide.

Who owns Mayer Road over Smiths Creek?

It is owned by the County Highway Agency.