US Bridges

Csah 6 over Little Rock River

Good

Nobles County, Minnesota · 1.1 MI W of JCT Csah 13 · Structure no. 4967

Built
1930
95 years old, rebuilt 1985
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
65 ft
2 main spans
Daily traffic
295
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 6 over Little Rock River is a steel stringer/multi-beam or girder carrying Csah 6 over Little Rock River in Nobles County, Minnesota. It was built in 1930 and reconstructed in 1985, so it is 95 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 295 vehicles a day, projected to reach 330 by 2039. The structure is 65 ft (19.7 m) long and 39 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCsah 6
CrossesLittle Rock River
Location1.1 MI W of JCT Csah 13
RouteCounty Highway 6
Coordinates43.54337, -95.81639
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length65 ft (19.7 m)
Longest span31 ft (9.4 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic295 (2019)
Projected traffic330 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 6 over Little Rock River built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1985.

What condition is Csah 6 over Little Rock River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Csah 6 over Little Rock River carry?

About 295 vehicles per day (2019 count).

How long is Csah 6 over Little Rock River?

The structure is 65 ft (19.7 m) long with a longest span of 31 ft (9.4 m) and a deck 39 ft wide.

Who owns Csah 6 over Little Rock River?

It is owned by the County Highway Agency.