US Bridges

Woodbury Road over Lookingglass River

Good

Shiawassee County, Michigan · 2 Miles S of Laingsburg · Structure no. 000000000009805

Built
1997
28 years old
Condition
Good
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
3,231
2011 count
Owner
County
County Highway Agency

About this bridge

Woodbury Road over Lookingglass River is a prestressed concrete box beam or girders - multiple carrying Woodbury Road over Lookingglass River in Shiawassee County, Michigan. It was built in 1997, so it is 28 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 3,231 vehicles a day, roughly 3% of them trucks, projected to reach 4,802 by 2031. The structure is 75 ft (23 m) long and 42 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesWoodbury Road
CrossesLookingglass River
Location2 Miles S of Laingsburg
RouteCounty Highway 7607
Coordinates42.85763, -84.3441
Functional classRural Major 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating49.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length75 ft (23 m)
Longest span68 ft (20.6 m)
Deck width42 ft (12.7 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,231 (2011)
Projected traffic4,802 by 2031
Trucks3%
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 Woodbury Road over Lookingglass River built?

It was built in 1997, making it 28 years old in 2025.

What condition is Woodbury Road over Lookingglass 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 April 2024.

How much traffic does Woodbury Road over Lookingglass River carry?

About 3,231 vehicles per day (2011 count), of which roughly 3% are trucks.

How long is Woodbury Road over Lookingglass River?

The structure is 75 ft (23 m) long with a longest span of 68 ft (20.6 m) and a deck 42 ft wide.

Who owns Woodbury Road over Lookingglass River?

It is owned by the County Highway Agency.