US Bridges

Csah 6 over Ann River

FairPosted for load

Kanabec County, Minnesota · 0.6 MI E of JCT CR 59 · Structure no. 33507

Built
1969
56 years old
Condition
Fair
inspected November 2023
Type
Slab
Wood or Timber
Length
78 ft
3 main spans
Daily traffic
1,100
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 6 over Ann River is a wood or timber slab carrying Csah 6 over Ann River in Kanabec County, Minnesota. It was built in 1969, so it is 56 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. Its operating status is: posted for load restriction.

It carries about 1,100 vehicles a day, projected to reach 1,050 by 2038. The structure is 78 ft (23.8 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCsah 6
CrossesAnn River
Location0.6 MI E of JCT CR 59
RouteCounty Highway 6
CountyKanabec County
StateMinnesota
Coordinates45.88935, -93.37465
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; extensive scour has occurred
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating34.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 20
Structure length78 ft (23.8 m)
Longest span26 ft (7.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2018)
Projected traffic1,050 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 6 over Ann River built?

It was built in 1969, making it 56 years old in 2025.

What condition is Csah 6 over Ann 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 November 2023.

How much traffic does Csah 6 over Ann River carry?

About 1,100 vehicles per day (2018 count).

How long is Csah 6 over Ann River?

The structure is 78 ft (23.8 m) long with a longest span of 26 ft (7.9 m) and a deck 32 ft wide.

Who owns Csah 6 over Ann River?

It is owned by the County Highway Agency.