US Bridges

Csah 86 over Porter Creek

Good

Rice County, Minnesota · 0.6 MI W of JCT CR 138 · Structure no. 70543

Built
2009
16 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
139 ft
1 main span
Daily traffic
5,900
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 86 over Porter Creek is a prestressed concrete stringer/multi-beam or girder carrying Csah 86 over Porter Creek in Rice County, Minnesota. It was built in 2009, so it is 16 years old, younger 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 5,900 vehicles a day, projected to reach 5,300 by 2038. The structure is 139 ft (42.3 m) long and 47 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesCsah 86
CrossesPorter Creek
Location0.6 MI W of JCT CR 138
RouteCounty Highway 86
Coordinates44.54385, -93.3925
Functional classRural Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.8 US tons
Inventory rating63.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length139 ft (42.3 m)
Longest span134 ft (40.8 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,900 (2018)
Projected traffic5,300 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 86 over Porter Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is Csah 86 over Porter 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 May 2023.

How much traffic does Csah 86 over Porter Creek carry?

About 5,900 vehicles per day (2018 count).

How long is Csah 86 over Porter Creek?

The structure is 139 ft (42.3 m) long with a longest span of 134 ft (40.8 m) and a deck 47 ft wide.

Who owns Csah 86 over Porter Creek?

It is owned by the County Highway Agency.