US Bridges

CR 136 over Perch Creek

Good

Blue Earth County, Minnesota · 1.2 MI N of JCT Csah 25 · Structure no. 07539

Built
1976
49 years old
Condition
Good
inspected October 2023
Type
Channel Beam
Prestressed Concrete
Length
93 ft
3 main spans
Daily traffic
28
2021 count
Owner
County
County Highway Agency

About this bridge

CR 136 over Perch Creek is a prestressed concrete channel beam carrying CR 136 over Perch Creek in Blue Earth County, Minnesota. It was built in 1976, so it is 49 years old, older 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 28 vehicles a day, projected to reach 15 by 2041. The structure is 93 ft (28.4 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCR 136
CrossesPerch Creek
Location1.2 MI N of JCT Csah 25
RouteCounty Highway 136
Coordinates43.94928, -94.34491
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72.6 US tons
Inventory rating43.5 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length93 ft (28.4 m)
Longest span31 ft (9.5 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28 (2021)
Projected traffic15 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 CR 136 over Perch Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is CR 136 over Perch Creek 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 2023.

How much traffic does CR 136 over Perch Creek carry?

About 28 vehicles per day (2021 count).

How long is CR 136 over Perch Creek?

The structure is 93 ft (28.4 m) long with a longest span of 31 ft (9.5 m) and a deck 32 ft wide.

Who owns CR 136 over Perch Creek?

It is owned by the County Highway Agency.