US Bridges

Csah 13 over I 90

Poor

Mower County, Minnesota · 6.0 MI E of JCT TH 56 · Structure no. 9507

Built
1960
65 years old
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
224 ft
4 main spans
Daily traffic
375
2016 count
Owner
State
State Highway Agency

About this bridge

Csah 13 over I 90 is a steel continuous stringer/multi-beam or girder carrying Csah 13 over I 90 in Mower County, Minnesota. It was built in 1960, so it is 65 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 375 vehicles a day, projected to reach 375 by 2039. The structure is 224 ft (68.2 m) long and 35 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCsah 13
CrossesI 90
Location6.0 MI E of JCT TH 56
RouteCounty Highway 13
CountyMower County
StateMinnesota
Coordinates43.67549, -92.74936
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.8 US tons
Inventory rating41.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length224 ft (68.2 m)
Longest span72 ft (22 m)
Deck width35 ft (10.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2016)
Projected traffic375 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 km)
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$336 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah 13 over I 90 built?

It was built in 1960, making it 65 years old in 2025.

What condition is Csah 13 over I 90 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Csah 13 over I 90 carry?

About 375 vehicles per day (2016 count).

How long is Csah 13 over I 90?

The structure is 224 ft (68.2 m) long with a longest span of 72 ft (22 m) and a deck 35 ft wide.

Who owns Csah 13 over I 90?

It is owned by the State Highway Agency.