US Bridges

Csah 1 over Watab River

Good

Stearns County, Minnesota · 0.3 MI N of JCT Csah 78 · Structure no. 73544

Built
1985
40 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
11,000
2017 count
Owner
County
County Highway Agency

About this bridge

Csah 1 over Watab River is a prestressed concrete stringer/multi-beam or girder carrying Csah 1 over Watab River in Stearns County, Minnesota. It was built in 1985, so it is 40 years old, older 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 11,000 vehicles a day, roughly 22% of them trucks, projected to reach 11,000 by 2039. The structure is 50 ft (15.3 m) long and 63 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesCsah 1
CrossesWatab River
Location0.3 MI N of JCT Csah 78
RouteCounty Highway 1
Coordinates45.61971, -94.20568
Functional classUrban Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43.4 US tons
Inventory rating25.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length50 ft (15.3 m)
Longest span44 ft (13.4 m)
Deck width63 ft (19.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2017)
Projected traffic11,000 by 2039
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed19.9 mi (32 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 Watab River built?

It was built in 1985, making it 40 years old in 2025.

What condition is Csah 1 over Watab 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 December 2023.

How much traffic does Csah 1 over Watab River carry?

About 11,000 vehicles per day (2017 count), of which roughly 22% are trucks.

How long is Csah 1 over Watab River?

The structure is 50 ft (15.3 m) long with a longest span of 44 ft (13.4 m) and a deck 63 ft wide.

Who owns Csah 1 over Watab River?

It is owned by the County Highway Agency.