US Bridges

Hill Road over Thread River

Fair

Genesee County, Michigan · Bet Saginaw & Center RD · Structure no. 000000000002712

Built
1995
30 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
14,407
2018 count
Owner
County
County Highway Agency

About this bridge

Hill Road over Thread River is a prestressed concrete box beam or girders - multiple carrying Hill Road over Thread River in Genesee County, Michigan. It was built in 1995, so it is 30 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 14,407 vehicles a day, roughly 5% of them trucks, projected to reach 26,020 by 2038. The structure is 60 ft (18.2 m) long and 66 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesHill Road
CrossesThread River
LocationBet Saginaw & Center RD
RouteCounty Highway 2002
CountyGenesee County
StateMichigan
Coordinates42.94465, -83.64568
Functional classUrban Minor Arterial

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length60 ft (18.2 m)
Longest span56 ft (17 m)
Deck width66 ft (20.1 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,407 (2018)
Projected traffic26,020 by 2038
Trucks5%
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 Hill Road over Thread River built?

It was built in 1995, making it 30 years old in 2025.

What condition is Hill Road over Thread 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 November 2024.

How much traffic does Hill Road over Thread River carry?

About 14,407 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Hill Road over Thread River?

The structure is 60 ft (18.2 m) long with a longest span of 56 ft (17 m) and a deck 66 ft wide.

Who owns Hill Road over Thread River?

It is owned by the County Highway Agency.