US Bridges

Sparling Road over Unnamed Creek

Fair

St. Clair County, Michigan · Sec. 12 Wales Twp. · Structure no. 000000000010061

Built
1993
32 years old, rebuilt 2020
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
617
2017 count
Owner
County
County Highway Agency

About this bridge

Sparling Road over Unnamed Creek is a prestressed concrete box beam or girders - multiple carrying Sparling Road over Unnamed Creek in St. Clair County, Michigan. It was built in 1993 and reconstructed in 2020, so it is 32 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 617 vehicles a day, roughly 17% of them trucks, projected to reach 920 by 2037. The structure is 72 ft (21.9 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSparling Road
CrossesUnnamed Creek
LocationSec. 12 Wales Twp.
RouteCounty Highway 7768
CountySt. Clair County
StateMichigan
Coordinates42.96836, -82.64358
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
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 alignment6: Equal to present minimum criteria
Operating rating59.3 US tons
Inventory rating45.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span68 ft (20.7 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic617 (2017)
Projected traffic920 by 2037
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Sparling Road over Unnamed Creek built?

It was built in 1993, making it 32 years old in 2025. It was reconstructed in 2020.

What condition is Sparling Road over Unnamed 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 September 2024.

How much traffic does Sparling Road over Unnamed Creek carry?

About 617 vehicles per day (2017 count), of which roughly 17% are trucks.

How long is Sparling Road over Unnamed Creek?

The structure is 72 ft (21.9 m) long with a longest span of 68 ft (20.7 m) and a deck 40 ft wide.

Who owns Sparling Road over Unnamed Creek?

It is owned by the County Highway Agency.