US Bridges

CR 136 over Big Cannon River

FairPosted for load

Le Sueur County, Minnesota · 1.7 MI S of JCT CR 138 · Structure no. 40510

Built
1977
48 years old
Condition
Fair
inspected October 2023
Type
Slab
Wood or Timber
Length
96 ft
3 main spans
Daily traffic
36
2021 count
Owner
County
County Highway Agency

About this bridge

CR 136 over Big Cannon River is a wood or timber slab carrying CR 136 over Big Cannon River in Le Sueur County, Minnesota. It was built in 1977, so it is 48 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 36 vehicles a day, projected to reach 65 by 2041. The structure is 96 ft (29.3 m) long and 34 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCR 136
CrossesBig Cannon River
Location1.7 MI S of JCT CR 138
RouteCounty Highway 136
CountyLe Sueur County
StateMinnesota
Coordinates44.34719, -93.64159
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.8 US tons
Inventory rating33.5 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length96 ft (29.3 m)
Longest span32 ft (9.8 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36 (2021)
Projected traffic65 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$956 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 136 over Big Cannon River built?

It was built in 1977, making it 48 years old in 2025.

What condition is CR 136 over Big Cannon 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 October 2023.

How much traffic does CR 136 over Big Cannon River carry?

About 36 vehicles per day (2021 count).

How long is CR 136 over Big Cannon River?

The structure is 96 ft (29.3 m) long with a longest span of 32 ft (9.8 m) and a deck 34 ft wide.

Who owns CR 136 over Big Cannon River?

It is owned by the County Highway Agency.