US Bridges

Csah 134 over Shannon River

Fair

St. Louis County, Minnesota · 0.5 MI N of JCT CSAH84 · Structure no. 7898

Built
1943
82 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
340
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 134 over Shannon River is a concrete culvert carrying Csah 134 over Shannon River in St. Louis County, Minnesota. It was built in 1943, so it is 82 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 340 vehicles a day, projected to reach 385 by 2039. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCsah 134
CrossesShannon River
Location0.5 MI N of JCT CSAH84
RouteCounty Highway 134
CountySt. Louis County
StateMinnesota
Coordinates47.55165, -92.94177
Functional classRural Minor 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating84.9 US tons
Inventory rating50.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic340 (2019)
Projected traffic385 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$48 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 134 over Shannon River built?

It was built in 1943, making it 82 years old in 2025.

What condition is Csah 134 over Shannon 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 August 2023.

How much traffic does Csah 134 over Shannon River carry?

About 340 vehicles per day (2019 count).

How long is Csah 134 over Shannon River?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.2 m).

Who owns Csah 134 over Shannon River?

It is owned by the County Highway Agency.