US Bridges

Csah 4 over Cedar River

Fair

Mower County, Minnesota · 0.6 MI E of JCT TH 105 · Structure no. 50508

Built
1965
60 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
203 ft
3 main spans
Daily traffic
290
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 4 over Cedar River is a steel continuous stringer/multi-beam or girder carrying Csah 4 over Cedar River in Mower County, Minnesota. It was built in 1965, so it is 60 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 290 vehicles a day, projected to reach 290 by 2039. The structure is 203 ft (61.9 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCsah 4
CrossesCedar River
Location0.6 MI E of JCT TH 105
RouteCounty Highway 4
CountyMower County
StateMinnesota
Coordinates43.60518, -92.9845
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length203 ft (61.9 m)
Longest span75 ft (22.9 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic290 (2016)
Projected traffic290 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$91 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 4 over Cedar River built?

It was built in 1965, making it 60 years old in 2025.

What condition is Csah 4 over Cedar 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 June 2023.

How much traffic does Csah 4 over Cedar River carry?

About 290 vehicles per day (2016 count).

How long is Csah 4 over Cedar River?

The structure is 203 ft (61.9 m) long with a longest span of 75 ft (22.9 m) and a deck 28 ft wide.

Who owns Csah 4 over Cedar River?

It is owned by the County Highway Agency.