US Bridges

Csah 75 over ST Augusta Creek

FairPosted for load

Stearns County, Minnesota · 1.5 MI SE of JCT Csah 7 · Structure no. 5417

Built
1935
90 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
53 ft
1 main span
Daily traffic
2,533
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 75 over ST Augusta Creek is a steel stringer/multi-beam or girder carrying Csah 75 over ST Augusta Creek in Stearns County, Minnesota. It was built in 1935, so it is 90 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 2,533 vehicles a day, roughly 9% of them trucks, projected to reach 4,400 by 2041. The structure is 53 ft (16.1 m) long and 37 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCsah 75
CrossesST Augusta Creek
Location1.5 MI SE of JCT Csah 7
RouteCounty Highway 75
CountyStearns County
StateMinnesota
Coordinates45.47034, -94.13561
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.1 US tons
Inventory rating20.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length53 ft (16.1 m)
Longest span50 ft (15.2 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,533 (2021)
Projected traffic4,400 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$130 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 75 over ST Augusta Creek built?

It was built in 1935, making it 90 years old in 2025.

What condition is Csah 75 over ST Augusta 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 December 2024.

How much traffic does Csah 75 over ST Augusta Creek carry?

About 2,533 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Csah 75 over ST Augusta Creek?

The structure is 53 ft (16.1 m) long with a longest span of 50 ft (15.2 m) and a deck 37 ft wide.

Who owns Csah 75 over ST Augusta Creek?

It is owned by the County Highway Agency.