US Bridges

Csah 45 over Straight River

Fair

Steele County, Minnesota · 1.3 MI SE of JCT TH 35 · Structure no. 3921

Built
1923
102 years old, rebuilt 1984
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
129 ft
3 main spans
Daily traffic
10,000
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 45 over Straight River is a prestressed concrete stringer/multi-beam or girder carrying Csah 45 over Straight River in Steele County, Minnesota. It was built in 1923 and reconstructed in 1984, so it is 102 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 10,000 vehicles a day, projected to reach 9,900 by 2039. The structure is 129 ft (39.4 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCsah 45
CrossesStraight River
Location1.3 MI SE of JCT TH 35
RouteCounty Highway 45
CountySteele County
StateMinnesota
Coordinates44.08768, -93.22929
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.8 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length129 ft (39.4 m)
Longest span43 ft (13.1 m)
Deck width63 ft (19.3 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2019)
Projected traffic9,900 by 2039
Trucks—
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 45 over Straight River built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1984.

What condition is Csah 45 over Straight 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 October 2024.

How much traffic does Csah 45 over Straight River carry?

About 10,000 vehicles per day (2019 count).

How long is Csah 45 over Straight River?

The structure is 129 ft (39.4 m) long with a longest span of 43 ft (13.1 m) and a deck 63 ft wide.

Who owns Csah 45 over Straight River?

It is owned by the County Highway Agency.