US Bridges

Csah 23 over Porter Creek

Fair

Scott County, Minnesota · 0.1 MI N of JCT CSAH56 · Structure no. 70J31

Built
2012
13 years old
Condition
Fair
inspected October 2022
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
3,200
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 23 over Porter Creek is a concrete culvert carrying Csah 23 over Porter Creek in Scott County, Minnesota. It was built in 2012, so it is 13 years old, younger 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.

It carries about 3,200 vehicles a day, projected to reach 3,000 by 2038. The structure is 30 ft (9 m) long. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesCsah 23
CrossesPorter Creek
Location0.1 MI N of JCT CSAH56
RouteCounty Highway 23
CountyScott County
StateMinnesota
Coordinates44.58776, -93.44043
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating43.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length30 ft (9 m)
Longest span12 ft (3.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2018)
Projected traffic3,000 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 23 over Porter Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is Csah 23 over Porter Creek 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 2022.

How much traffic does Csah 23 over Porter Creek carry?

About 3,200 vehicles per day (2018 count).

How long is Csah 23 over Porter Creek?

The structure is 30 ft (9 m) long with a longest span of 12 ft (3.8 m).

Who owns Csah 23 over Porter Creek?

It is owned by the County Highway Agency.