US Bridges

Csah 8 over N Br Root River

GoodPosted for load

Olmsted County, Minnesota · 0.7 MI N of JCT Csah 6 · Structure no. 55512

Built
1966
59 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
182 ft
3 main spans
Daily traffic
1,000
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 8 over N Br Root River is a steel continuous stringer/multi-beam or girder carrying Csah 8 over N Br Root River in Olmsted County, Minnesota. It was built in 1966, so it is 59 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. Its operating status is: posted for load restriction.

It carries about 1,000 vehicles a day, projected to reach 871 by 2038. The structure is 182 ft (55.5 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCsah 8
CrossesN Br Root River
Location0.7 MI N of JCT Csah 6
RouteCounty Highway 8
Coordinates43.85079, -92.549
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length182 ft (55.5 m)
Longest span68 ft (20.7 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2018)
Projected traffic871 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 8 over N Br Root River built?

It was built in 1966, making it 59 years old in 2025.

What condition is Csah 8 over N Br Root 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 8 over N Br Root River carry?

About 1,000 vehicles per day (2018 count).

How long is Csah 8 over N Br Root River?

The structure is 182 ft (55.5 m) long with a longest span of 68 ft (20.7 m) and a deck 33 ft wide.

Who owns Csah 8 over N Br Root River?

It is owned by the County Highway Agency.