US Bridges

HWY 489 over Rainy River

Good

Presque Isle County, Michigan · 5.5 MI N of Onaway · Structure no. 000000000008976

Built
2015
10 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
107 ft
3 main spans
Daily traffic
1,375
2014 count
Owner
County
County Highway Agency

About this bridge

HWY 489 over Rainy River is a steel stringer/multi-beam or girder carrying HWY 489 over Rainy River in Presque Isle County, Michigan. It was built in 2015, so it is 10 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 1,375 vehicles a day, roughly 1% of them trucks, projected to reach 2,483 by 2034. The structure is 107 ft (32.6 m) long and 37 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesHWY 489
CrossesRainy River
Location5.5 MI N of Onaway
RouteCounty Highway 7107
Coordinates45.44624, -84.21653
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating70.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length107 ft (32.6 m)
Longest span65 ft (19.7 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,375 (2014)
Projected traffic2,483 by 2034
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 HWY 489 over Rainy River built?

It was built in 2015, making it 10 years old in 2025.

What condition is HWY 489 over Rainy River 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 September 2023.

How much traffic does HWY 489 over Rainy River carry?

About 1,375 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is HWY 489 over Rainy River?

The structure is 107 ft (32.6 m) long with a longest span of 65 ft (19.7 m) and a deck 37 ft wide.

Who owns HWY 489 over Rainy River?

It is owned by the County Highway Agency.