US Bridges

Csah 12 over Straight River

Good

Steele County, Minnesota · 0.1 MI E of JCT I-35W · Structure no. 74556

Built
2014
11 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
227 ft
3 main spans
Daily traffic
4,250
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 12 over Straight River is a prestressed concrete stringer/multi-beam or girder carrying Csah 12 over Straight River in Steele County, Minnesota. It was built in 2014, so it is 11 years old, younger than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,250 vehicles a day, projected to reach 3,950 by 2039. The structure is 227 ft (69.2 m) long and 52 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCsah 12
CrossesStraight River
Location0.1 MI E of JCT I-35W
RouteCounty Highway 12
CountySteele County
StateMinnesota
Coordinates44.17346, -93.25604
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating51 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length227 ft (69.2 m)
Longest span75 ft (22.9 m)
Deck width52 ft (15.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,250 (2019)
Projected traffic3,950 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 12 over Straight River built?

It was built in 2014, making it 11 years old in 2025.

What condition is Csah 12 over Straight River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Csah 12 over Straight River carry?

About 4,250 vehicles per day (2019 count).

How long is Csah 12 over Straight River?

The structure is 227 ft (69.2 m) long with a longest span of 75 ft (22.9 m) and a deck 52 ft wide.

Who owns Csah 12 over Straight River?

It is owned by the County Highway Agency.