US Bridges

Mt. Hope Road over Portage River S Branch

Good

Jackson County, Michigan · 1 M S 3.7 M W of Waterloo · Structure no. 000000000004503

Built
1986
39 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
850
2000 count
Owner
County
County Highway Agency

About this bridge

Mt. Hope Road over Portage River S Branch is a prestressed concrete box beam or girders - multiple carrying Mt. Hope Road over Portage River S Branch in Jackson County, Michigan. It was built in 1986, so it is 39 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 850 vehicles a day, projected to reach 1,000 by 2020. The structure is 34 ft (10.3 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMt. Hope Road
CrossesPortage River S Branch
Location1 M S 3.7 M W of Waterloo
RouteCounty Highway 0
Coordinates42.33692, -84.20977
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 US tons
Inventory rating36.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.3 m)
Longest span34 ft (10.3 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2000)
Projected traffic1,000 by 2020
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 Mt. Hope Road over Portage River S Branch built?

It was built in 1986, making it 39 years old in 2025.

What condition is Mt. Hope Road over Portage River S Branch 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 October 2024.

How much traffic does Mt. Hope Road over Portage River S Branch carry?

About 850 vehicles per day (2000 count).

How long is Mt. Hope Road over Portage River S Branch?

The structure is 34 ft (10.3 m) long with a longest span of 34 ft (10.3 m) and a deck 37 ft wide.

Who owns Mt. Hope Road over Portage River S Branch?

It is owned by the County Highway Agency.