US Bridges

Iosco Road over W Br Red Cedar River Drn

Good

Livingston County, Michigan · Sec 17 Iosco Twp · Structure no. 000000000005812

Built
1948
77 years old, rebuilt 2022
Condition
Good
inspected April 2024
Type
Box Beam or Girders - Single or Spread
Steel
Length
30 ft
1 main span
Daily traffic
190
2020 count
Owner
County
County Highway Agency

About this bridge

Iosco Road over W Br Red Cedar River Drn is a steel box beam or girders - single or spread carrying Iosco Road over W Br Red Cedar River Drn in Livingston County, Michigan. It was built in 1948 and reconstructed in 2022, so it is 77 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 190 vehicles a day, projected to reach 232 by 2040. The structure is 30 ft (9.1 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIosco Road
CrossesW Br Red Cedar River Drn
LocationSec 17 Iosco Twp
RouteCounty Highway 0
CountyLivingston County
StateMichigan
Coordinates42.56797, -84.12763
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 17 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length30 ft (9.1 m)
Longest span28 ft (8.4 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2020)
Projected traffic232 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Iosco Road over W Br Red Cedar River Drn built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 2022.

What condition is Iosco Road over W Br Red Cedar River Drn in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does Iosco Road over W Br Red Cedar River Drn carry?

About 190 vehicles per day (2020 count).

How long is Iosco Road over W Br Red Cedar River Drn?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.4 m) and a deck 32 ft wide.

Who owns Iosco Road over W Br Red Cedar River Drn?

It is owned by the County Highway Agency.