US Bridges

Hamburg Road over Huron River

Good

Livingston County, Michigan · Sec 24 Hamburg Twp · Structure no. 000000000005838

Built
1963
62 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
135 ft
3 main spans
Daily traffic
4,959
2013 count
Owner
County
County Highway Agency

About this bridge

Hamburg Road over Huron River is a steel stringer/multi-beam or girder carrying Hamburg Road over Huron River in Livingston County, Michigan. It was built in 1963, so it is 62 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 4,959 vehicles a day, roughly 2% of them trucks, projected to reach 8,867 by 2028. The structure is 135 ft (41.1 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesHamburg Road
CrossesHuron River
LocationSec 24 Hamburg Twp
RouteCounty Highway 4771
Coordinates42.46513, -83.80009
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 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 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 rating74.3 US tons
Inventory rating44.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span44 ft (13.4 m)
Deck width37 ft (11.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,959 (2013)
Projected traffic8,867 by 2028
Trucks2%
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 Hamburg Road over Huron River built?

It was built in 1963, making it 62 years old in 2025.

What condition is Hamburg Road over Huron 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 November 2024.

How much traffic does Hamburg Road over Huron River carry?

About 4,959 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is Hamburg Road over Huron River?

The structure is 135 ft (41.1 m) long with a longest span of 44 ft (13.4 m) and a deck 37 ft wide.

Who owns Hamburg Road over Huron River?

It is owned by the County Highway Agency.