US Bridges

Csah 16 over S Fk Watonwan River

Good

Watonwan County, Minnesota · 2.0 MI E of JCT Csah 13 · Structure no. 83521

Built
1987
38 years old
Condition
Good
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
140 ft
3 main spans
Daily traffic
45
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 16 over S Fk Watonwan River is a prestressed concrete tee beam carrying Csah 16 over S Fk Watonwan River in Watonwan 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 45 vehicles a day, projected to reach 45 by 2035. The structure is 140 ft (42.7 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCsah 16
CrossesS Fk Watonwan River
Location2.0 MI E of JCT Csah 13
RouteCounty Highway 16
Coordinates44.00032, -94.50591
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating29.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span46 ft (14.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2016)
Projected traffic45 by 2035
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 S Fk Watonwan River built?

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

What condition is Csah 16 over S Fk Watonwan River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Csah 16 over S Fk Watonwan River carry?

About 45 vehicles per day (2016 count).

How long is Csah 16 over S Fk Watonwan River?

The structure is 140 ft (42.7 m) long with a longest span of 46 ft (14.1 m) and a deck 35 ft wide.

Who owns Csah 16 over S Fk Watonwan River?

It is owned by the County Highway Agency.