US Bridges

M-28 over Jumbo Creek

Fair

Houghton County, Michigan · 1.6 MI W of Kenton · Structure no. 000000000003389

Built
1949
76 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
135 ft
3 main spans
Daily traffic
2,303
2007 count
Owner
State
State Highway Agency

About this bridge

M-28 over Jumbo Creek is a steel stringer/multi-beam or girder carrying M-28 over Jumbo Creek in Houghton County, Michigan. It was built in 1949, so it is 76 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 2,303 vehicles a day, roughly 17% of them trucks, projected to reach 2,648 by 2027. The structure is 135 ft (41.1 m) long and 40 ft wide. If it were closed, the detour would be 55.3 mi (89 km).

Location

Open in Google Maps
CarriesM-28
CrossesJumbo Creek
Location1.6 MI W of Kenton
RouteState Highway 28
CountyHoughton County
StateMichigan
Coordinates46.48701, -88.92351
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58.5 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length135 ft (41.1 m)
Longest span44 ft (13.4 m)
Deck width40 ft (12.3 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,303 (2007)
Projected traffic2,648 by 2027
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.3 mi (89 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 M-28 over Jumbo Creek built?

It was built in 1949, making it 76 years old in 2025.

What condition is M-28 over Jumbo Creek 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 July 2023.

How much traffic does M-28 over Jumbo Creek carry?

About 2,303 vehicles per day (2007 count), of which roughly 17% are trucks.

How long is M-28 over Jumbo Creek?

The structure is 135 ft (41.1 m) long with a longest span of 44 ft (13.4 m) and a deck 40 ft wide.

Who owns M-28 over Jumbo Creek?

It is owned by the State Highway Agency.