US Bridges

Bristol Road over Thread River

Good

Genesee County, Michigan · Between Center & Dort HWY · Structure no. 000000000002714

Built
1973
52 years old, rebuilt 2017
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
12,844
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bristol Road over Thread River is a steel stringer/multi-beam or girder carrying Bristol Road over Thread River in Genesee County, Michigan. It was built in 1973 and reconstructed in 2017, so it is 52 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 12,844 vehicles a day, roughly 5% of them trucks, projected to reach 16,147 by 2037. The structure is 45 ft (13.7 m) long and 77 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesBristol Road
CrossesThread River
LocationBetween Center & Dort HWY
RouteCity Street 2002
Coordinates42.97502, -83.63552
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating49.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length45 ft (13.7 m)
Longest span43 ft (13.1 m)
Deck width77 ft (23.6 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,844 (2014)
Projected traffic16,147 by 2037
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Bristol Road over Thread River built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2017.

What condition is Bristol Road over Thread River 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 August 2023.

How much traffic does Bristol Road over Thread River carry?

About 12,844 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Bristol Road over Thread River?

The structure is 45 ft (13.7 m) long with a longest span of 43 ft (13.1 m) and a deck 77 ft wide.

Who owns Bristol Road over Thread River?

It is owned by the City or Municipal Highway Agency.