US Bridges

Csah 90 over Blue Earth River

Good

Blue Earth County, Minnesota · 2.2 MI SE of JCT TH 169 · Structure no. 07569

Built
1995
30 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
707 ft
5 main spans
Daily traffic
4,194
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 90 over Blue Earth River is a prestressed concrete stringer/multi-beam or girder carrying Csah 90 over Blue Earth River in Blue Earth County, Minnesota. It was built in 1995, so it is 30 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 4,194 vehicles a day, projected to reach 3,850 by 2041. The structure is 707 ft (215.4 m) long and 65 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCsah 90
CrossesBlue Earth River
Location2.2 MI SE of JCT TH 169
RouteCounty Highway 90
Coordinates44.13221, -94.04587
Functional classUrban Minor Arterial

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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.9 US tons
Inventory rating37.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length707 ft (215.4 m)
Longest span140 ft (42.7 m)
Deck width65 ft (19.9 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,194 (2021)
Projected traffic3,850 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 90 over Blue Earth River built?

It was built in 1995, making it 30 years old in 2025.

What condition is Csah 90 over Blue Earth 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 October 2024.

How much traffic does Csah 90 over Blue Earth River carry?

About 4,194 vehicles per day (2021 count).

How long is Csah 90 over Blue Earth River?

The structure is 707 ft (215.4 m) long with a longest span of 140 ft (42.7 m) and a deck 65 ft wide.

Who owns Csah 90 over Blue Earth River?

It is owned by the County Highway Agency.