US Bridges

Csah 4 over Trout Brook

Fair

Goodhue County, Minnesota · 0.9 MI S of JCT CR 42 · Structure no. 25521

Built
1976
49 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
117 ft
3 main spans
Daily traffic
330
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 4 over Trout Brook is a steel continuous stringer/multi-beam or girder carrying Csah 4 over Trout Brook in Goodhue County, Minnesota. It was built in 1976, so it is 49 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 330 vehicles a day, projected to reach 360 by 2039. The structure is 117 ft (35.7 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCsah 4
CrossesTrout Brook
Location0.9 MI S of JCT CR 42
RouteCounty Highway 4
CountyGoodhue County
StateMinnesota
Coordinates44.33033, -92.5912
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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating55.1 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length117 ft (35.7 m)
Longest span45 ft (13.7 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2019)
Projected traffic360 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 4 over Trout Brook built?

It was built in 1976, making it 49 years old in 2025.

What condition is Csah 4 over Trout Brook 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 November 2023.

How much traffic does Csah 4 over Trout Brook carry?

About 330 vehicles per day (2019 count).

How long is Csah 4 over Trout Brook?

The structure is 117 ft (35.7 m) long with a longest span of 45 ft (13.7 m) and a deck 36 ft wide.

Who owns Csah 4 over Trout Brook?

It is owned by the County Highway Agency.