US Bridges

Csah 7 over Boy River

Fair

Cass County, Minnesota · 1.0 MI E of JCT Csah 54 · Structure no. 11521

Built
2002
23 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
85 ft
3 main spans
Daily traffic
1,400
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 7 over Boy River is a concrete continuous slab carrying Csah 7 over Boy River in Cass County, Minnesota. It was built in 2002, so it is 23 years old, younger 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 1,400 vehicles a day, projected to reach 1,250 by 2039. The structure is 85 ft (25.8 m) long and 43 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesCsah 7
CrossesBoy River
Location1.0 MI E of JCT Csah 54
RouteCounty Highway 7
CountyCass County
StateMinnesota
Coordinates46.97785, -94.18311
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
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 rating72 US tons
Inventory rating43.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length85 ft (25.8 m)
Longest span32 ft (9.8 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2019)
Projected traffic1,250 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 Csah 7 over Boy River built?

It was built in 2002, making it 23 years old in 2025.

What condition is Csah 7 over Boy 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 August 2023.

How much traffic does Csah 7 over Boy River carry?

About 1,400 vehicles per day (2019 count).

How long is Csah 7 over Boy River?

The structure is 85 ft (25.8 m) long with a longest span of 32 ft (9.8 m) and a deck 43 ft wide.

Who owns Csah 7 over Boy River?

It is owned by the County Highway Agency.