US Bridges

Herbison Road over Looking Glass River

Good

Clinton County, Michigan · 0.2 MI E of Wacousta RD · Structure no. 000000000002020

Built
1985
40 years old, rebuilt 2022
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Steel
Length
104 ft
2 main spans
Daily traffic
545
2020 count
Owner
County
County Highway Agency

About this bridge

Herbison Road over Looking Glass River is a steel box beam or girders - single or spread carrying Herbison Road over Looking Glass River in Clinton County, Michigan. It was built in 1985 and reconstructed in 2022, so it is 40 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 545 vehicles a day, projected to reach 1,097 by 2040. The structure is 104 ft (31.7 m) long and 38 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesHerbison Road
CrossesLooking Glass River
Location0.2 MI E of Wacousta RD
RouteCounty Highway 0
CountyClinton County
StateMichigan
Coordinates42.82774, -84.69468
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.4 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length104 ft (31.7 m)
Longest span51 ft (15.5 m)
Deck width38 ft (11.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic545 (2020)
Projected traffic1,097 by 2040
Trucks0%
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 Herbison Road over Looking Glass River built?

It was built in 1985, making it 40 years old in 2025. It was reconstructed in 2022.

What condition is Herbison Road over Looking Glass 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 October 2024.

How much traffic does Herbison Road over Looking Glass River carry?

About 545 vehicles per day (2020 count).

How long is Herbison Road over Looking Glass River?

The structure is 104 ft (31.7 m) long with a longest span of 51 ft (15.5 m) and a deck 38 ft wide.

Who owns Herbison Road over Looking Glass River?

It is owned by the County Highway Agency.