US Bridges

Curtis Road over Smith Creek

Fair

Iosco County, Michigan · 0.1 MI W of Allen Road · Structure no. 000000000004155

Built
1931
94 years old, rebuilt 1984
Condition
Fair
inspected June 2024
Type
Slab
Wood or Timber
Length
22 ft
1 main span
Daily traffic
120
2006 count
Owner
County
County Highway Agency

About this bridge

Curtis Road over Smith Creek is a wood or timber slab carrying Curtis Road over Smith Creek in Iosco County, Michigan. It was built in 1931 and reconstructed in 1984, so it is 94 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 120 vehicles a day, roughly 5% of them trucks, projected to reach 200 by 2026. The structure is 22 ft (6.7 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCurtis Road
CrossesSmith Creek
Location0.1 MI W of Allen Road
RouteCounty Highway 0
Coordinates44.364, -83.74707
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.6 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2006)
Projected traffic200 by 2026
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Curtis Road over Smith Creek built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1984.

What condition is Curtis Road over Smith 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 Curtis Road over Smith Creek carry?

About 120 vehicles per day (2006 count), of which roughly 5% are trucks.

How long is Curtis Road over Smith Creek?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns Curtis Road over Smith Creek?

It is owned by the County Highway Agency.