US Bridges

Csah 28 over Buffalo River

Fair

Clay County, Minnesota · 0.5 MI E of JCT Csah 5 · Structure no. 14502

Built
1970
55 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
201 ft
3 main spans
Daily traffic
80
2013 count
Owner
County
County Highway Agency

About this bridge

Csah 28 over Buffalo River is a prestressed concrete box beam or girders - multiple carrying Csah 28 over Buffalo River in Clay County, Minnesota. It was built in 1970, so it is 55 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 80 vehicles a day, projected to reach 80 by 2039. The structure is 201 ft (61.3 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCsah 28
CrossesBuffalo River
Location0.5 MI E of JCT Csah 5
RouteCounty Highway 28
Coordinates47.00521, -96.72731
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating85.3 US tons
Inventory rating51 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length201 ft (61.3 m)
Longest span67 ft (20.4 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2013)
Projected traffic80 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 28 over Buffalo River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Csah 28 over Buffalo 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 November 2024.

How much traffic does Csah 28 over Buffalo River carry?

About 80 vehicles per day (2013 count).

How long is Csah 28 over Buffalo River?

The structure is 201 ft (61.3 m) long with a longest span of 67 ft (20.4 m) and a deck 32 ft wide.

Who owns Csah 28 over Buffalo River?

It is owned by the County Highway Agency.