US Bridges

Csah 1 over Poplar River

Fair

Polk County, Minnesota · 3.5 MI W of JCT Csah 24 · Structure no. 92443

Built
1966
59 years old
Condition
Fair
inspected October 2023
Type
Channel Beam
Prestressed Concrete
Length
50 ft
2 main spans
Daily traffic
660
2017 count
Owner
County
County Highway Agency

About this bridge

Csah 1 over Poplar River is a prestressed concrete channel beam carrying Csah 1 over Poplar River in Polk County, Minnesota. It was built in 1966, so it is 59 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 5 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 660 vehicles a day, projected to reach 660 by 2039. The structure is 50 ft (15.2 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCsah 1
CrossesPoplar River
Location3.5 MI W of JCT Csah 24
RouteCounty Highway 1
CountyPolk County
StateMinnesota
Coordinates47.5716, -95.67228
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.5 US tons
Inventory rating46.7 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length50 ft (15.2 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic660 (2017)
Projected traffic660 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 1 over Poplar River built?

It was built in 1966, making it 59 years old in 2025.

What condition is Csah 1 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 1 over Poplar River carry?

About 660 vehicles per day (2017 count).

How long is Csah 1 over Poplar River?

The structure is 50 ft (15.2 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns Csah 1 over Poplar River?

It is owned by the County Highway Agency.