US Bridges

Csah 7 over Rapid River

Fair

Lake of the Woods County, Minnesota · 2.0 MI N of JCT Csah 16 · Structure no. 39505

Built
1978
47 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Prestressed Concrete
Length
167 ft
3 main spans
Daily traffic
61
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 7 over Rapid River is a prestressed concrete tee beam carrying Csah 7 over Rapid River in Lake of the Woods County, Minnesota. It was built in 1978, so it is 47 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 61 vehicles a day, projected to reach 45 by 2041. The structure is 167 ft (51 m) long and 33 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesCsah 7
CrossesRapid River
Location2.0 MI N of JCT Csah 16
RouteCounty Highway 7
Coordinates48.56625, -94.49485
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.6 US tons
Inventory rating29.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length167 ft (51 m)
Longest span55 ft (16.9 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61 (2021)
Projected traffic45 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Rapid River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Csah 7 over Rapid 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 2023.

How much traffic does Csah 7 over Rapid River carry?

About 61 vehicles per day (2021 count).

How long is Csah 7 over Rapid River?

The structure is 167 ft (51 m) long with a longest span of 55 ft (16.9 m) and a deck 33 ft wide.

Who owns Csah 7 over Rapid River?

It is owned by the County Highway Agency.