US Bridges

US 169 over Rum River

Fair

Mille Lacs County, Minnesota · 1.6 MI S of JCT TH 23 · Structure no. 48006

Built
1986
39 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
213 ft
2 main spans
Daily traffic
8,550
2018 count
Owner
State
State Highway Agency

About this bridge

US 169 over Rum River is a prestressed concrete stringer/multi-beam or girder carrying US 169 over Rum River in Mille Lacs County, Minnesota. It was built in 1986, so it is 39 years old, older than the Minnesota average of 38.5 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 8,550 vehicles a day, roughly 3% of them trucks, projected to reach 8,250 by 2038. The structure is 213 ft (64.9 m) long and 44 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 169
CrossesRum River
Location1.6 MI S of JCT TH 23
RouteU.S. Route 169
CountyMille Lacs County
StateMinnesota
Coordinates45.73363, -93.63946
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length213 ft (64.9 m)
Longest span104 ft (31.7 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,550 (2018)
Projected traffic8,250 by 2038
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 US 169 over Rum River built?

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

What condition is US 169 over Rum River 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 September 2024.

How much traffic does US 169 over Rum River carry?

About 8,550 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is US 169 over Rum River?

The structure is 213 ft (64.9 m) long with a longest span of 104 ft (31.7 m) and a deck 44 ft wide.

Who owns US 169 over Rum River?

It is owned by the State Highway Agency.