US Bridges

Csah 7 over I 90

Fair

Martin County, Minnesota · 3.2 MI W of JCT TH 4 · Structure no. 46801

Built
1971
54 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
279 ft
4 main spans
Daily traffic
132
2022 count
Owner
State
State Highway Agency

About this bridge

Csah 7 over I 90 is a prestressed concrete stringer/multi-beam or girder carrying Csah 7 over I 90 in Martin County, Minnesota. It was built in 1971, so it is 54 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 132 vehicles a day, projected to reach 155 by 2042. The structure is 279 ft (85.1 m) long and 36 ft wide.

Location

Open in Google Maps
CarriesCsah 7
CrossesI 90
Location3.2 MI W of JCT TH 4
RouteCounty Highway 7
CountyMartin County
StateMinnesota
Coordinates43.65295, -94.79404
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.9 US tons
Inventory rating29.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length279 ft (85.1 m)
Longest span86 ft (26.1 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic132 (2022)
Projected traffic155 by 2042
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 7 over I 90 built?

It was built in 1971, making it 54 years old in 2025.

What condition is Csah 7 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 June 2023.

How much traffic does Csah 7 over I 90 carry?

About 132 vehicles per day (2022 count).

How long is Csah 7 over I 90?

The structure is 279 ft (85.1 m) long with a longest span of 86 ft (26.1 m) and a deck 36 ft wide.

Who owns Csah 7 over I 90?

It is owned by the State Highway Agency.