US Bridges

Csah 13 over Mud River

Good

Beltrami County, Minnesota · 1.5 MI S of JCT Csah 32 · Structure no. 93537

Built
1981
44 years old
Condition
Good
inspected September 2022
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
195
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 13 over Mud River is a concrete culvert carrying Csah 13 over Mud River in Beltrami County, Minnesota. It was built in 1981, so it is 44 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 195 vehicles a day, projected to reach 165 by 2038. The structure is 24 ft (7.2 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesCsah 13
CrossesMud River
Location1.5 MI S of JCT Csah 32
RouteCounty Highway 13
Coordinates47.75415, -94.93528
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.2 m)
Longest span10 ft (2.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic195 (2018)
Projected traffic165 by 2038
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 13 over Mud River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Csah 13 over Mud 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 September 2022.

How much traffic does Csah 13 over Mud River carry?

About 195 vehicles per day (2018 count).

How long is Csah 13 over Mud River?

The structure is 24 ft (7.2 m) long with a longest span of 10 ft (2.9 m).

Who owns Csah 13 over Mud River?

It is owned by the County Highway Agency.