US Bridges

Csah 52 over Swan River

FairPosted for load

Morrison County, Minnesota · 5.7 MI S of JCT CR 223 · Structure no. 49523

Built
1978
47 years old
Condition
Fair
inspected September 2023
Type
Slab
Wood or Timber
Length
90 ft
3 main spans
Daily traffic
780
2020 count
Owner
County
County Highway Agency

About this bridge

Csah 52 over Swan River is a wood or timber slab carrying Csah 52 over Swan River in Morrison 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 780 vehicles a day, roughly 4% of them trucks, projected to reach 640 by 2040. The structure is 90 ft (27.4 m) long and 34 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCsah 52
CrossesSwan River
Location5.7 MI S of JCT CR 223
RouteCounty Highway 52
CountyMorrison County
StateMinnesota
Coordinates45.91866, -94.38916
Functional classUrban 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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating33.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic780 (2020)
Projected traffic640 by 2040
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$1,000 million (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 52 over Swan River built?

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

What condition is Csah 52 over Swan 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 52 over Swan River carry?

About 780 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Csah 52 over Swan River?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 34 ft wide.

Who owns Csah 52 over Swan River?

It is owned by the County Highway Agency.