US Bridges

Csah 20 over Buffalo Creek

Fair

Renville County, Minnesota · 1.6 MI N of JCT TH 212 · Structure no. 65531

Built
1969
56 years old
Condition
Fair
inspected October 2023
Type
Channel Beam
Prestressed Concrete
Length
93 ft
3 main spans
Daily traffic
520
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 20 over Buffalo Creek is a prestressed concrete channel beam carrying Csah 20 over Buffalo Creek in Renville County, Minnesota. It was built in 1969, so it is 56 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 520 vehicles a day, projected to reach 560 by 2039. The structure is 93 ft (28.4 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCsah 20
CrossesBuffalo Creek
Location1.6 MI N of JCT TH 212
RouteCounty Highway 20
CountyRenville County
StateMinnesota
Coordinates44.74813, -94.51832
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating33.8 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadH 20
Structure length93 ft (28.4 m)
Longest span31 ft (9.4 m)
Deck width35 ft (10.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2019)
Projected traffic560 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 20 over Buffalo Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Csah 20 over Buffalo Creek 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 October 2023.

How much traffic does Csah 20 over Buffalo Creek carry?

About 520 vehicles per day (2019 count).

How long is Csah 20 over Buffalo Creek?

The structure is 93 ft (28.4 m) long with a longest span of 31 ft (9.4 m) and a deck 35 ft wide.

Who owns Csah 20 over Buffalo Creek?

It is owned by the County Highway Agency.