US Bridges

Stein Road over Pinnebog River

Good

Huron County, Michigan · Sec. 30-31 Colfax Twp. · Structure no. 000000000003556

Built
1977
48 years old
Condition
Good
inspected September 2023
Type
Culvert
Steel
Length
23 ft
1 main span
Daily traffic
150
2009 count
Owner
County
County Highway Agency

About this bridge

Stein Road over Pinnebog River is a steel culvert carrying Stein Road over Pinnebog River in Huron County, Michigan. It was built in 1977, so it is 48 years old, younger 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 150 vehicles a day, roughly 1% of them trucks, projected to reach 270 by 2029. The structure is 23 ft (7 m) long.

CarriesStein Road
CrossesPinnebog River
LocationSec. 30-31 Colfax Twp.
RouteCounty Highway 3230
Coordinates43.77828, -83.10082
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating39.2 US tons
Inventory rating28.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadH 20
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2009)
Projected traffic270 by 2029
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Stein Road over Pinnebog River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Stein Road over Pinnebog 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 September 2023.

How much traffic does Stein Road over Pinnebog River carry?

About 150 vehicles per day (2009 count), of which roughly 1% are trucks.

How long is Stein Road over Pinnebog River?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m).

Who owns Stein Road over Pinnebog River?

It is owned by the County Highway Agency.