US Bridges

Csah 30 over Poplar River

Fair

Polk County, Minnesota · 0.2 MI E of JCT Csah 8 · Structure no. 91511

Built
1977
48 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
50 ft
3 main spans
Daily traffic
190
2017 count
Owner
County
County Highway Agency

About this bridge

Csah 30 over Poplar River is a concrete culvert carrying Csah 30 over Poplar River in Polk County, Minnesota. It was built in 1977, so it is 48 years old, older 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 190 vehicles a day, projected to reach 190 by 2039. The structure is 50 ft (15.2 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCsah 30
CrossesPoplar River
Location0.2 MI E of JCT Csah 8
RouteCounty Highway 30
CountyPolk County
StateMinnesota
Coordinates47.6442, -95.87953
Functional classRural Major Collector

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 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2017)
Projected traffic190 by 2039
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 Csah 30 over Poplar River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Csah 30 over Poplar River 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 2023.

How much traffic does Csah 30 over Poplar River carry?

About 190 vehicles per day (2017 count).

How long is Csah 30 over Poplar River?

The structure is 50 ft (15.2 m) long with a longest span of 13 ft (3.9 m).

Who owns Csah 30 over Poplar River?

It is owned by the County Highway Agency.