US Bridges

CR 139 over Perch Creek

PoorPosted for load

Blue Earth County, Minnesota · 1.2 MI E of JCT Csah 24 · Structure no. 90571

Built
1956
69 years old
Condition
Poor
inspected October 2024
Type
Channel Beam
Prestressed Concrete
Length
50 ft
2 main spans
Daily traffic
36
2021 count
Owner
County
County Highway Agency

About this bridge

CR 139 over Perch Creek is a prestressed concrete channel beam carrying CR 139 over Perch Creek in Blue Earth County, Minnesota. It was built in 1956, so it is 69 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 4 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: posted for load restriction.

It carries about 36 vehicles a day, projected to reach 15 by 2041. The structure is 50 ft (15.2 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCR 139
CrossesPerch Creek
Location1.2 MI E of JCT Csah 24
RouteCounty Highway 139
Coordinates43.92048, -94.34561
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating29.5 US tons
Inventory rating16.5 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span24 ft (7.3 m)
Deck width29 ft (8.9 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36 (2021)
Projected traffic15 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 CR 139 over Perch Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is CR 139 over Perch Creek 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 2024.

How much traffic does CR 139 over Perch Creek carry?

About 36 vehicles per day (2021 count).

How long is CR 139 over Perch Creek?

The structure is 50 ft (15.2 m) long with a longest span of 24 ft (7.3 m) and a deck 29 ft wide.

Who owns CR 139 over Perch Creek?

It is owned by the County Highway Agency.