US Bridges

Csah 16 over Bois De Sioux River

Fair

Traverse County, Minnesota · 0.5 MI W of JCT Csah 9 · Structure no. 78507

Built
1987
38 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Prestressed Concrete
Length
165 ft
3 main spans
Daily traffic
80
2012 count
Owner
County
County Highway Agency

About this bridge

Csah 16 over Bois De Sioux River is a prestressed concrete tee beam carrying Csah 16 over Bois De Sioux River in Traverse County, Minnesota. It was built in 1987, so it is 38 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 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 80 vehicles a day, projected to reach 100 by 2032. The structure is 165 ft (50.3 m) long and 34 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesCsah 16
CrossesBois De Sioux River
Location0.5 MI W of JCT Csah 9
RouteCounty Highway 16
Coordinates45.92033, -96.56389
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating38 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length165 ft (50.3 m)
Longest span55 ft (16.8 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2012)
Projected traffic100 by 2032
Trucks—
Lanes on structure2
Traffic directionTwo-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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 16 over Bois De Sioux River built?

It was built in 1987, making it 38 years old in 2025.

What condition is Csah 16 over Bois De Sioux 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 December 2023.

How much traffic does Csah 16 over Bois De Sioux River carry?

About 80 vehicles per day (2012 count).

How long is Csah 16 over Bois De Sioux River?

The structure is 165 ft (50.3 m) long with a longest span of 55 ft (16.8 m) and a deck 34 ft wide.

Who owns Csah 16 over Bois De Sioux River?

It is owned by the County Highway Agency.