US Bridges

Csah 31 over Popple River

Good

Itasca County, Minnesota · 1.3 MI NE of JCT TH 46 · Structure no. 31542

Built
2001
24 years old
Condition
Good
inspected May 2023
Type
Slab
Wood or Timber
Length
28 ft
1 main span
Daily traffic
40
2017 count
Owner
County
County Highway Agency

About this bridge

Csah 31 over Popple River is a wood or timber slab carrying Csah 31 over Popple River in Itasca County, Minnesota. It was built in 2001, so it is 24 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 40 vehicles a day, projected to reach 40 by 2039. The structure is 28 ft (8.5 m) long and 32 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesCsah 31
CrossesPopple River
Location1.3 MI NE of JCT TH 46
RouteCounty Highway 31
CountyItasca County
StateMinnesota
Coordinates47.79202, -94.24612
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating76.3 US tons
Inventory rating55.1 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length28 ft (8.5 m)
Longest span26 ft (7.8 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2017)
Projected traffic40 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 31 over Popple River built?

It was built in 2001, making it 24 years old in 2025.

What condition is Csah 31 over Popple River 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 31 over Popple River carry?

About 40 vehicles per day (2017 count).

How long is Csah 31 over Popple River?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.8 m) and a deck 32 ft wide.

Who owns Csah 31 over Popple River?

It is owned by the County Highway Agency.