US Bridges

Csah #33 over Minn. Riv.

Fair

Lac qui Parle County, Minnesota · 4 Mi. Wnw of Watson Mn · Structure no. 000000000006391

Built
1938
87 years old, rebuilt 1996
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
239 ft
12 main spans
Daily traffic
330
2021 count
Owner
Federal
Corps of Engineers (Civil)

About this bridge

Csah #33 over Minn. Riv. is a concrete continuous slab carrying Csah #33 over Minn. Riv. in Lac qui Parle County, Minnesota. It was built in 1938 and reconstructed in 1996, so it is 87 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 5 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 330 vehicles a day, roughly 13% of them trucks, projected to reach 500 by 2040. The structure is 239 ft (72.9 m) long and 49 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesCsah #33
CrossesMinn. Riv.
Location4 Mi. Wnw of Watson Mn
RouteCounty Highway 33
Coordinates45.02194, -95.86917
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64 US tons
Inventory rating38.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans12
Design loadHS 25 or greater
Structure length239 ft (72.9 m)
Longest span20 ft (6 m)
Deck width49 ft (14.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2021)
Projected traffic500 by 2040
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCorps of Engineers (Civil)
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$1.5 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah #33 over Minn. Riv. built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1996.

What condition is Csah #33 over Minn. Riv. 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 Csah #33 over Minn. Riv. carry?

About 330 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is Csah #33 over Minn. Riv.?

The structure is 239 ft (72.9 m) long with a longest span of 20 ft (6 m) and a deck 49 ft wide.

Who owns Csah #33 over Minn. Riv.?

It is owned by the Corps of Engineers (Civil) and maintained by the County Highway Agency.