US Bridges

Csah 27 over ST Louis River

Fair

St. Louis County, Minnesota · 0.1 MI E of JCT CR 312 · Structure no. 69623

Built
1999
26 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
290 ft
2 main spans
Daily traffic
210
2015 count
Owner
County
County Highway Agency

About this bridge

Csah 27 over ST Louis River is a prestressed concrete stringer/multi-beam or girder carrying Csah 27 over ST Louis River in St. Louis County, Minnesota. It was built in 1999, so it is 26 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 5 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 210 vehicles a day, projected to reach 210 by 2039. The structure is 290 ft (88.5 m) long and 43 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCsah 27
CrossesST Louis River
Location0.1 MI E of JCT CR 312
RouteCounty Highway 27
CountySt. Louis County
StateMinnesota
Coordinates47.30539, -92.65978
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating109.8 US tons
Inventory rating53.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length290 ft (88.5 m)
Longest span142 ft (43.3 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2015)
Projected traffic210 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 27 over ST Louis River built?

It was built in 1999, making it 26 years old in 2025.

What condition is Csah 27 over ST Louis 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 October 2023.

How much traffic does Csah 27 over ST Louis River carry?

About 210 vehicles per day (2015 count).

How long is Csah 27 over ST Louis River?

The structure is 290 ft (88.5 m) long with a longest span of 142 ft (43.3 m) and a deck 43 ft wide.

Who owns Csah 27 over ST Louis River?

It is owned by the County Highway Agency.