US Bridges

Csah 8 over Upper Iowa River

Fair

Mower County, Minnesota · 0.1 MI N of JCT TH 56 · Structure no. 50585

Built
2004
21 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
130 ft
3 main spans
Daily traffic
600
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 8 over Upper Iowa River is a concrete continuous slab carrying Csah 8 over Upper Iowa River in Mower County, Minnesota. It was built in 2004, so it is 21 years old, younger 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 600 vehicles a day, projected to reach 600 by 2039. The structure is 130 ft (39.6 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCsah 8
CrossesUpper Iowa River
Location0.1 MI N of JCT TH 56
RouteCounty Highway 8
CountyMower County
StateMinnesota
Coordinates43.53776, -92.56878
Functional classRural Major 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 rating88.4 US tons
Inventory rating52.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length130 ft (39.6 m)
Longest span49 ft (14.9 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2016)
Projected traffic600 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$1,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 8 over Upper Iowa River built?

It was built in 2004, making it 21 years old in 2025.

What condition is Csah 8 over Upper Iowa 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 July 2023.

How much traffic does Csah 8 over Upper Iowa River carry?

About 600 vehicles per day (2016 count).

How long is Csah 8 over Upper Iowa River?

The structure is 130 ft (39.6 m) long with a longest span of 49 ft (14.9 m) and a deck 39 ft wide.

Who owns Csah 8 over Upper Iowa River?

It is owned by the County Highway Agency.