US Bridges

Csah 39 over I 90

Good

Martin County, Minnesota · 1.8 MI W of JCT TH 15 · Structure no. 46814

Built
1973
52 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
322 ft
4 main spans
Daily traffic
3,400
2018 count
Owner
State
State Highway Agency

About this bridge

Csah 39 over I 90 is a prestressed concrete stringer/multi-beam or girder carrying Csah 39 over I 90 in Martin County, Minnesota. It was built in 1973, so it is 52 years old, older 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 3,400 vehicles a day, projected to reach 3,200 by 2038. The structure is 322 ft (98.1 m) long and 50 ft wide.

CarriesCsah 39
CrossesI 90
Location1.8 MI W of JCT TH 15
RouteCounty Highway 39
Coordinates43.67957, -94.49253
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.8 US tons
Inventory rating38.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length322 ft (98.1 m)
Longest span87 ft (26.4 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2018)
Projected traffic3,200 by 2038
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 39 over I 90 built?

It was built in 1973, making it 52 years old in 2025.

What condition is Csah 39 over I 90 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 April 2023.

How much traffic does Csah 39 over I 90 carry?

About 3,400 vehicles per day (2018 count).

How long is Csah 39 over I 90?

The structure is 322 ft (98.1 m) long with a longest span of 87 ft (26.4 m) and a deck 50 ft wide.

Who owns Csah 39 over I 90?

It is owned by the State Highway Agency.