US Bridges

Steel Road over Big Potato Creek

PoorPosted for load

Saginaw County, Michigan · 0.4 MI N of Brant Road · Structure no. 000000000009313

Built
1920
105 years old, rebuilt 1996
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
38 ft
2 main spans
Daily traffic
79
2022 count
Owner
County
County Highway Agency

About this bridge

Steel Road over Big Potato Creek is a steel stringer/multi-beam or girder carrying Steel Road over Big Potato Creek in Saginaw County, Michigan. It was built in 1920 and reconstructed in 1996, so it is 105 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 79 vehicles a day, roughly 5% of them trucks, projected to reach 90 by 2032. The structure is 38 ft (11.5 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSteel Road
CrossesBig Potato Creek
Location0.4 MI N of Brant Road
RouteCounty Highway 0
Coordinates43.26457, -84.28854
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating12.9 US tons
Inventory rating7.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 10
Structure length38 ft (11.5 m)
Longest span21 ft (6.4 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (2022)
Projected traffic90 by 2032
Trucks5%
Lanes on structure2
Traffic directionOne-lane bridge for two-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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$300,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Steel Road over Big Potato Creek built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1996.

What condition is Steel Road over Big Potato Creek 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 October 2024.

How much traffic does Steel Road over Big Potato Creek carry?

About 79 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Steel Road over Big Potato Creek?

The structure is 38 ft (11.5 m) long with a longest span of 21 ft (6.4 m) and a deck 16 ft wide.

Who owns Steel Road over Big Potato Creek?

It is owned by the County Highway Agency.