US Bridges

Csah 6 over Otter Creek

Fair

Mower County, Minnesota · 1.0 MI E of JCT Csah 105 · Structure no. 50530

Built
1974
51 years old
Condition
Fair
inspected May 2024
Type
Channel Beam
Prestressed Concrete
Length
93 ft
3 main spans
Daily traffic
520
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 6 over Otter Creek is a prestressed concrete channel beam carrying Csah 6 over Otter Creek in Mower County, Minnesota. It was built in 1974, so it is 51 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 520 by 2039. The structure is 93 ft (28.4 m) long and 41 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesCsah 6
CrossesOtter Creek
Location1.0 MI E of JCT Csah 105
RouteCounty Highway 6
CountyMower County
StateMinnesota
Coordinates43.51433, -92.92141
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionMay 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.3 US tons
Inventory rating45.7 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length93 ft (28.4 m)
Longest span31 ft (9.5 m)
Deck width41 ft (12.6 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2016)
Projected traffic520 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 Otter Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is Csah 6 over Otter Creek 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 May 2024.

How much traffic does Csah 6 over Otter Creek carry?

About 520 vehicles per day (2016 count).

How long is Csah 6 over Otter Creek?

The structure is 93 ft (28.4 m) long with a longest span of 31 ft (9.5 m) and a deck 41 ft wide.

Who owns Csah 6 over Otter Creek?

It is owned by the County Highway Agency.