US Bridges

Csah 9 over Blue Earth River

PoorClosed to traffic

Blue Earth County, Minnesota · 0.5 MI SW of JCT Csah 34 · Structure no. 07542

Built
1985
40 years old
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
616 ft
5 main spans
Daily traffic
572
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 9 over Blue Earth River is a steel continuous stringer/multi-beam or girder carrying Csah 9 over Blue Earth River in Blue Earth County, Minnesota. It was built in 1985, so it is 40 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 1 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. Its operating status is: closed to all traffic.

It carries about 572 vehicles a day, projected to reach 480 by 2041. The structure is 616 ft (187.9 m) long and 53 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesCsah 9
CrossesBlue Earth River
Location0.5 MI SW of JCT Csah 34
RouteCounty Highway 9
Coordinates44.09207, -94.10795
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure1 Imminent FailureMajor deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service.
Channel and channel protection2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length616 ft (187.9 m)
Longest span140 ft (42.7 m)
Deck width53 ft (16.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic572 (2021)
Projected traffic480 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed11.8 mi (19 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 9 over Blue Earth River built?

It was built in 1985, making it 40 years old in 2025.

What condition is Csah 9 over Blue Earth River 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 October 2023.

How much traffic does Csah 9 over Blue Earth River carry?

About 572 vehicles per day (2021 count).

How long is Csah 9 over Blue Earth River?

The structure is 616 ft (187.9 m) long with a longest span of 140 ft (42.7 m) and a deck 53 ft wide.

Who owns Csah 9 over Blue Earth River?

It is owned by the County Highway Agency.