US Bridges

Slack Road over Br. #1 Northwest Drain

Fair

Tuscola County, Michigan · Village of Fairgrove · Structure no. 000000000010674

Built
1965
60 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
200
2002 count
Owner
City
City or Municipal Highway Agency

About this bridge

Slack Road over Br. #1 Northwest Drain is a steel stringer/multi-beam or girder carrying Slack Road over Br. #1 Northwest Drain in Tuscola County, Michigan. It was built in 1965, so it is 60 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 5 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 200 vehicles a day, roughly 5% of them trucks, projected to reach 250 by 2024. The structure is 31 ft (9.4 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSlack Road
CrossesBr. #1 Northwest Drain
LocationVillage of Fairgrove
RouteCity Street 0
CountyTuscola County
StateMichigan
Coordinates43.51635, -83.54369
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span30 ft (9 m)
Deck width31 ft (9.5 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2002)
Projected traffic250 by 2024
Trucks5%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Slack Road over Br. #1 Northwest Drain built?

It was built in 1965, making it 60 years old in 2025.

What condition is Slack Road over Br. #1 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 2024.

How much traffic does Slack Road over Br. #1 Northwest Drain carry?

About 200 vehicles per day (2002 count), of which roughly 5% are trucks.

How long is Slack Road over Br. #1 Northwest Drain?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9 m) and a deck 31 ft wide.

Who owns Slack Road over Br. #1 Northwest Drain?

It is owned by the City or Municipal Highway Agency.