US Bridges

Csah 4 over Wild Rice River

Fair

Mahnomen County, Minnesota · 0.6 MI S of JCT Csah 14 · Structure no. 44504

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Slab
Wood or Timber
Length
90 ft
3 main spans
Daily traffic
310
2016 count
Owner
County
County Highway Agency

About this bridge

Csah 4 over Wild Rice River is a wood or timber slab carrying Csah 4 over Wild Rice River in Mahnomen 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 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 310 vehicles a day, projected to reach 310 by 2039. The structure is 90 ft (27.4 m) long and 34 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesCsah 4
CrossesWild Rice River
Location0.6 MI S of JCT Csah 14
RouteCounty Highway 4
Coordinates47.38716, -95.63669
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating45.7 US tons
Inventory rating28.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2016)
Projected traffic310 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 4 over Wild Rice River built?

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

What condition is Csah 4 over Wild Rice 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 September 2024.

How much traffic does Csah 4 over Wild Rice River carry?

About 310 vehicles per day (2016 count).

How long is Csah 4 over Wild Rice River?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 34 ft wide.

Who owns Csah 4 over Wild Rice River?

It is owned by the County Highway Agency.