US Bridges

Csah 16 over Le Sueur River

Fair

Blue Earth County, Minnesota · 1.2 MI N of JCT Csah 35 · Structure no. 07512

Built
1965
60 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
222 ft
3 main spans
Daily traffic
1,450
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 16 over Le Sueur River is a steel continuous stringer/multi-beam or girder carrying Csah 16 over Le Sueur River in Blue Earth County, Minnesota. It was built in 1965, so it is 60 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 1,450 vehicles a day, projected to reach 1,100 by 2038. The structure is 222 ft (67.7 m) long and 33 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCsah 16
CrossesLe Sueur River
Location1.2 MI N of JCT Csah 35
RouteCounty Highway 16
CountyBlue Earth County
StateMinnesota
Coordinates44.08048, -94.00857
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating49.9 US tons
Inventory rating29.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length222 ft (67.7 m)
Longest span84 ft (25.6 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,450 (2018)
Projected traffic1,100 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$658 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 16 over Le Sueur River built?

It was built in 1965, making it 60 years old in 2025.

What condition is Csah 16 over Le Sueur River 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 November 2024.

How much traffic does Csah 16 over Le Sueur River carry?

About 1,450 vehicles per day (2018 count).

How long is Csah 16 over Le Sueur River?

The structure is 222 ft (67.7 m) long with a longest span of 84 ft (25.6 m) and a deck 33 ft wide.

Who owns Csah 16 over Le Sueur River?

It is owned by the County Highway Agency.