US Bridges

Csah 11 over Upper Iowa River

Good

Mower County, Minnesota · 0.8 MI E of JCT TH 56 · Structure no. 50K37

Built
2013
12 years old
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
48 ft
3 main spans
Daily traffic
210
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 11 over Upper Iowa River is a concrete culvert carrying Csah 11 over Upper Iowa River in Mower County, Minnesota. It was built in 2013, so it is 12 years old, younger 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 210 vehicles a day, projected to reach 210 by 2039. The structure is 48 ft (14.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCsah 11
CrossesUpper Iowa River
Location0.8 MI E of JCT TH 56
RouteCounty Highway 11
CountyMower County
StateMinnesota
Coordinates43.55821, -92.58907
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length48 ft (14.7 m)
Longest span14 ft (4.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2016)
Projected traffic210 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 11 over Upper Iowa River built?

It was built in 2013, making it 12 years old in 2025.

What condition is Csah 11 over Upper Iowa 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 August 2024.

How much traffic does Csah 11 over Upper Iowa River carry?

About 210 vehicles per day (2016 count).

How long is Csah 11 over Upper Iowa River?

The structure is 48 ft (14.7 m) long with a longest span of 14 ft (4.4 m).

Who owns Csah 11 over Upper Iowa River?

It is owned by the County Highway Agency.