US Bridges

CR 766 over Sturgeon River

Fair

St. Louis County, Minnesota · 0.3 MI S of JCT CR 931 · Structure no. 92103

Built
1963
62 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
20
2015 count
Owner
County
County Highway Agency

About this bridge

CR 766 over Sturgeon River is a steel stringer/multi-beam or girder carrying CR 766 over Sturgeon River in St. Louis County, Minnesota. It was built in 1963, so it is 62 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 20 vehicles a day, projected to reach 20 by 2039. The structure is 51 ft (15.4 m) long and 16 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesCR 766
CrossesSturgeon River
Location0.3 MI S of JCT CR 931
RouteCounty Highway 766
CountySt. Louis County
StateMinnesota
Coordinates47.65596, -92.93124
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating34.3 US tons
Inventory rating26.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length51 ft (15.4 m)
Longest span48 ft (14.5 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2015)
Projected traffic20 by 2039
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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$117 million
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 766 over Sturgeon River built?

It was built in 1963, making it 62 years old in 2025.

What condition is CR 766 over Sturgeon 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 CR 766 over Sturgeon River carry?

About 20 vehicles per day (2015 count).

How long is CR 766 over Sturgeon River?

The structure is 51 ft (15.4 m) long with a longest span of 48 ft (14.5 m) and a deck 16 ft wide.

Who owns CR 766 over Sturgeon River?

It is owned by the County Highway Agency.