US Bridges

Sherman RD over Silver Creek

Fair

Iosco County, Michigan · 6 MI N of M55 · Structure no. 000000000004147

Built
1994
31 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
38 ft
1 main span
Daily traffic
1,190
2006 count
Owner
County
County Highway Agency

About this bridge

Sherman RD over Silver Creek is a prestressed concrete box beam or girders - multiple carrying Sherman RD over Silver Creek in Iosco County, Michigan. It was built in 1994, so it is 31 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 1,190 vehicles a day, roughly 10% of them trucks, projected to reach 2,100 by 2026. The structure is 38 ft (11.6 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSherman RD
CrossesSilver Creek
Location6 MI N of M55
RouteCounty Highway 3557
CountyIosco County
StateMichigan
Coordinates44.36686, -83.5131
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating46.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span33 ft (10 m)
Deck width34 ft (10.5 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,190 (2006)
Projected traffic2,100 by 2026
Trucks10%
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 Sherman RD over Silver Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Sherman RD over Silver 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 Sherman RD over Silver Creek carry?

About 1,190 vehicles per day (2006 count), of which roughly 10% are trucks.

How long is Sherman RD over Silver Creek?

The structure is 38 ft (11.6 m) long with a longest span of 33 ft (10 m) and a deck 34 ft wide.

Who owns Sherman RD over Silver Creek?

It is owned by the County Highway Agency.