US Bridges

Vassar Road over Northwest Drain

Fair

Tuscola County, Michigan · Sec 7-18 Fairgrove Twp · Structure no. 000000000010502

Built
1971
54 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
530
2009 count
Owner
County
County Highway Agency

About this bridge

Vassar Road over Northwest Drain is a prestressed concrete box beam or girders - multiple carrying Vassar Road over Northwest Drain in Tuscola County, Michigan. It was built in 1971, so it is 54 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 530 vehicles a day, projected to reach 955 by 2029. The structure is 46 ft (14 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesVassar Road
CrossesNorthwest Drain
LocationSec 7-18 Fairgrove Twp
RouteCounty Highway 7921
CountyTuscola County
StateMichigan
Coordinates43.53768, -83.58134
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating60 US tons
Inventory rating35.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span45 ft (13.6 m)
Deck width36 ft (11.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (2009)
Projected traffic955 by 2029
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 Vassar Road over Northwest Drain built?

It was built in 1971, making it 54 years old in 2025.

What condition is Vassar Road over Northwest Drain in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does Vassar Road over Northwest Drain carry?

About 530 vehicles per day (2009 count).

How long is Vassar Road over Northwest Drain?

The structure is 46 ft (14 m) long with a longest span of 45 ft (13.6 m) and a deck 36 ft wide.

Who owns Vassar Road over Northwest Drain?

It is owned by the County Highway Agency.