US Bridges

Toma Road over Portage River

Fair

Livingston County, Michigan · Sec 34-35 Putnam Twp · Structure no. 000000000005890

Built
1978
47 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
200
2014 count
Owner
County
County Highway Agency

About this bridge

Toma Road over Portage River is a prestressed concrete box beam or girders - multiple carrying Toma Road over Portage River in Livingston County, Michigan. It was built in 1978, so it is 47 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 200 vehicles a day, projected to reach 300 by 2021. The structure is 47 ft (14.3 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesToma Road
CrossesPortage River
LocationSec 34-35 Putnam Twp
RouteCounty Highway 0
CountyLivingston County
StateMichigan
Coordinates42.42441, -83.94989
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85.3 US tons
Inventory rating51 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span45 ft (13.7 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2014)
Projected traffic300 by 2021
Trucks—
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 Toma Road over Portage River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Toma Road over Portage River 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 Toma Road over Portage River carry?

About 200 vehicles per day (2014 count).

How long is Toma Road over Portage River?

The structure is 47 ft (14.3 m) long with a longest span of 45 ft (13.7 m) and a deck 30 ft wide.

Who owns Toma Road over Portage River?

It is owned by the County Highway Agency.