US Bridges

29 Mile Road over Tupper Brook

Fair

Macomb County, Michigan · 100FT East of Hartway RD · Structure no. 000000000006225

Built
1980
45 years old
Condition
Fair
inspected June 2023
Type
Culvert
Steel
Length
33 ft
2 main spans
Daily traffic
2,830
2009 count
Owner
County
County Highway Agency

About this bridge

29 Mile Road over Tupper Brook is a steel culvert carrying 29 Mile Road over Tupper Brook in Macomb County, Michigan. It was built in 1980, so it is 45 years old, younger 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 2,830 vehicles a day, roughly 3% of them trucks, projected to reach 4,205 by 2029. The structure is 33 ft (10 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries29 Mile Road
CrossesTupper Brook
Location100FT East of Hartway RD
RouteCounty Highway 5068
CountyMacomb County
StateMichigan
Coordinates42.76147, -82.90111
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating72.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length33 ft (10 m)
Longest span15 ft (4.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,830 (2009)
Projected traffic4,205 by 2029
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 29 Mile Road over Tupper Brook built?

It was built in 1980, making it 45 years old in 2025.

What condition is 29 Mile Road over Tupper Brook 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 June 2023.

How much traffic does 29 Mile Road over Tupper Brook carry?

About 2,830 vehicles per day (2009 count), of which roughly 3% are trucks.

How long is 29 Mile Road over Tupper Brook?

The structure is 33 ft (10 m) long with a longest span of 15 ft (4.5 m).

Who owns 29 Mile Road over Tupper Brook?

It is owned by the County Highway Agency.