US Bridges

Csah 30 over N Fk Zumbro River

Fair

Goodhue County, Minnesota · 1.2 MI W of JCT TH 57 · Structure no. 25520

Built
1979
46 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
174 ft
3 main spans
Daily traffic
520
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 30 over N Fk Zumbro River is a steel continuous stringer/multi-beam or girder carrying Csah 30 over N Fk Zumbro River in Goodhue County, Minnesota. It was built in 1979, so it is 46 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 520 vehicles a day, projected to reach 570 by 2039. The structure is 174 ft (53.1 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCsah 30
CrossesN Fk Zumbro River
Location1.2 MI W of JCT TH 57
RouteCounty Highway 30
CountyGoodhue County
StateMinnesota
Coordinates44.31223, -92.81291
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
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating37.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length174 ft (53.1 m)
Longest span65 ft (19.8 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2019)
Projected traffic570 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 30 over N Fk Zumbro River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Csah 30 over N Fk Zumbro 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 October 2023.

How much traffic does Csah 30 over N Fk Zumbro River carry?

About 520 vehicles per day (2019 count).

How long is Csah 30 over N Fk Zumbro River?

The structure is 174 ft (53.1 m) long with a longest span of 65 ft (19.8 m) and a deck 35 ft wide.

Who owns Csah 30 over N Fk Zumbro River?

It is owned by the County Highway Agency.