US Bridges

Csah 7 over N Br Root River

Fair

Mower County, Minnesota · 2.7 MI N of JCT Csah 1 · Structure no. 50542

Built
1977
48 years old
Condition
Fair
inspected September 2024
Type
Channel Beam
Prestressed Concrete
Length
81 ft
3 main spans
Daily traffic
285
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 7 over N Br Root River is a prestressed concrete channel beam carrying Csah 7 over N Br Root River in Mower County, Minnesota. It was built in 1977, so it is 48 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 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 285 vehicles a day, projected to reach 285 by 2039. The structure is 81 ft (24.8 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCsah 7
CrossesN Br Root River
Location2.7 MI N of JCT Csah 1
RouteCounty Highway 7
CountyMower County
StateMinnesota
Coordinates43.84372, -92.72974
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.5 US tons
Inventory rating39.2 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length81 ft (24.8 m)
Longest span31 ft (9.5 m)
Deck width41 ft (12.6 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic285 (2016)
Projected traffic285 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 7 over N Br Root River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Csah 7 over N Br Root 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 September 2024.

How much traffic does Csah 7 over N Br Root River carry?

About 285 vehicles per day (2016 count).

How long is Csah 7 over N Br Root River?

The structure is 81 ft (24.8 m) long with a longest span of 31 ft (9.5 m) and a deck 41 ft wide.

Who owns Csah 7 over N Br Root River?

It is owned by the County Highway Agency.