US Bridges

US 75 over Middle River

Good

Marshall County, Minnesota · 0.1 MI N of JCT Csah 4 · Structure no. 45004

Built
1982
43 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
77 ft
2 main spans
Daily traffic
1,150
2018 count
Owner
State
State Highway Agency

About this bridge

US 75 over Middle River is a concrete continuous slab carrying US 75 over Middle River in Marshall County, Minnesota. It was built in 1982, so it is 43 years old, older than the Minnesota average of 38.5 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 1,150 vehicles a day, roughly 19% of them trucks, projected to reach 1,000 by 2038. The structure is 77 ft (23.6 m) long and 50 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS 75
CrossesMiddle River
Location0.1 MI N of JCT Csah 4
RouteU.S. Route 75
Coordinates48.34111, -96.818
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating89.9 US tons
Inventory rating54 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length77 ft (23.6 m)
Longest span37 ft (11.3 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,150 (2018)
Projected traffic1,000 by 2038
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 75 over Middle River built?

It was built in 1982, making it 43 years old in 2025.

What condition is US 75 over Middle 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 2024.

How much traffic does US 75 over Middle River carry?

About 1,150 vehicles per day (2018 count), of which roughly 19% are trucks.

How long is US 75 over Middle River?

The structure is 77 ft (23.6 m) long with a longest span of 37 ft (11.3 m) and a deck 50 ft wide.

Who owns US 75 over Middle River?

It is owned by the State Highway Agency.