US Bridges

Csah 40 over French River

Fair

St. Louis County, Minnesota · 0.1 MI E of JCT CR 249 · Structure no. 92932

Built
1968
57 years old
Condition
Fair
inspected October 2024
Type
Slab
Wood or Timber
Length
25 ft
1 main span
Daily traffic
160
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 40 over French River is a wood or timber slab carrying Csah 40 over French River in St. Louis County, Minnesota. It was built in 1968, so it is 57 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.

It carries about 160 vehicles a day, projected to reach 150 by 2039. The structure is 25 ft (7.6 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCsah 40
CrossesFrench River
Location0.1 MI E of JCT CR 249
RouteCounty Highway 40
CountySt. Louis County
StateMinnesota
Coordinates46.96695, -91.99471
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.
Superstructure7 GoodSome minor problems.
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.1 US tons
Inventory rating62.6 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2019)
Projected traffic150 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 40 over French River built?

It was built in 1968, making it 57 years old in 2025.

What condition is Csah 40 over French 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 2024.

How much traffic does Csah 40 over French River carry?

About 160 vehicles per day (2019 count).

How long is Csah 40 over French River?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 30 ft wide.

Who owns Csah 40 over French River?

It is owned by the County Highway Agency.