US Bridges

Csah 1 over S Br Rapid River

PoorPosted for load

Lake of the Woods County, Minnesota · 0.5 MI N of JCT CR 86 · Structure no. 39501

Built
1960
65 years old
Condition
Poor
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
161 ft
3 main spans
Daily traffic
125
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 1 over S Br Rapid River is a steel continuous stringer/multi-beam or girder carrying Csah 1 over S Br Rapid River in Lake of the Woods County, Minnesota. It was built in 1960, so it is 65 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 125 vehicles a day, projected to reach 150 by 2042. The structure is 161 ft (49.1 m) long and 32 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesCsah 1
CrossesS Br Rapid River
Location0.5 MI N of JCT CR 86
RouteCounty Highway 1
Coordinates48.50473, -94.647
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating28.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length161 ft (49.1 m)
Longest span60 ft (18.3 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2022)
Projected traffic150 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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$477 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 1 over S Br Rapid River built?

It was built in 1960, making it 65 years old in 2025.

What condition is Csah 1 over S Br Rapid River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2025.

How much traffic does Csah 1 over S Br Rapid River carry?

About 125 vehicles per day (2022 count).

How long is Csah 1 over S Br Rapid River?

The structure is 161 ft (49.1 m) long with a longest span of 60 ft (18.3 m) and a deck 32 ft wide.

Who owns Csah 1 over S Br Rapid River?

It is owned by the County Highway Agency.