US Bridges

Csah 15 over I 90

Fair

Nobles County, Minnesota · 3.1 MI E of JCT TH 91 · Structure no. 53809

Built
1965
60 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
213 ft
4 main spans
Daily traffic
360
2015 count
Owner
State
State Highway Agency

About this bridge

Csah 15 over I 90 is a prestressed concrete stringer/multi-beam or girder carrying Csah 15 over I 90 in Nobles County, Minnesota. It was built in 1965, so it is 60 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.

It carries about 360 vehicles a day, projected to reach 360 by 2039. The structure is 213 ft (64.8 m) long and 34 ft wide.

Location

Open in Google Maps
CarriesCsah 15
CrossesI 90
Location3.1 MI E of JCT TH 91
RouteCounty Highway 15
CountyNobles County
StateMinnesota
Coordinates43.63765, -95.87411
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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating35.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length213 ft (64.8 m)
Longest span67 ft (20.5 m)
Deck width34 ft (10.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic360 (2015)
Projected traffic360 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah 15 over I 90 built?

It was built in 1965, making it 60 years old in 2025.

What condition is Csah 15 over I 90 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 May 2023.

How much traffic does Csah 15 over I 90 carry?

About 360 vehicles per day (2015 count).

How long is Csah 15 over I 90?

The structure is 213 ft (64.8 m) long with a longest span of 67 ft (20.5 m) and a deck 34 ft wide.

Who owns Csah 15 over I 90?

It is owned by the State Highway Agency.