US Bridges

Csah 1 over Watonwan River

Good

Watonwan County, Minnesota · 0.5 MI W of JCT TH 4 · Structure no. 83541

Built
1998
27 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete Continuous
Length
108 ft
3 main spans
Daily traffic
35
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 1 over Watonwan River is a concrete continuous slab carrying Csah 1 over Watonwan River in Watonwan County, Minnesota. It was built in 1998, so it is 27 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 35 vehicles a day, projected to reach 35 by 2035. The structure is 108 ft (32.9 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCsah 1
CrossesWatonwan River
Location0.5 MI W of JCT TH 4
RouteCounty Highway 1
Coordinates44.07996, -94.64937
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
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 evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101.5 US tons
Inventory rating60.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length108 ft (32.9 m)
Longest span41 ft (12.4 m)
Deck width35 ft (10.6 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2016)
Projected traffic35 by 2035
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 1 over Watonwan River built?

It was built in 1998, making it 27 years old in 2025.

What condition is Csah 1 over 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 1 over Watonwan River carry?

About 35 vehicles per day (2016 count).

How long is Csah 1 over Watonwan River?

The structure is 108 ft (32.9 m) long with a longest span of 41 ft (12.4 m) and a deck 35 ft wide.

Who owns Csah 1 over Watonwan River?

It is owned by the County Highway Agency.