US Bridges

Csah 18 over Stream

Poor

Sibley County, Minnesota · 0.1 MI N of JCT Csah 8 · Structure no. 3200

Built
1930
95 years old
Condition
Poor
inspected June 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
294
2022 count
Owner
County
County Highway Agency

About this bridge

Csah 18 over Stream is a concrete culvert carrying Csah 18 over Stream in Sibley County, Minnesota. It was built in 1930, so it is 95 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.

It carries about 294 vehicles a day, projected to reach 215 by 2042. The structure is 23 ft (6.9 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCsah 18
CrossesStream
Location0.1 MI N of JCT Csah 8
RouteCounty Highway 18
CountySibley County
StateMinnesota
Coordinates44.48182, -93.93559
Functional classRural Minor Collector

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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40.7 US tons
Inventory rating31.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length23 ft (6.9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic294 (2022)
Projected traffic215 by 2042
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$265 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 18 over Stream built?

It was built in 1930, making it 95 years old in 2025.

What condition is Csah 18 over Stream 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 June 2024.

How much traffic does Csah 18 over Stream carry?

About 294 vehicles per day (2022 count).

How long is Csah 18 over Stream?

The structure is 23 ft (6.9 m) long with a longest span of 10 ft (3 m).

Who owns Csah 18 over Stream?

It is owned by the County Highway Agency.