Csah 131 over Sand River

Fair

St. Louis County, Minnesota · 0.3 MI N of JCT TH 53 · Structure no. 69584

Built: 1991; 34 years old
Condition: Fair; inspected August 2023
Type: Slab; Wood or Timber
Length: 53 ft; 3 main spans
Daily traffic: 245; 2019 count
Owner: County; County Highway Agency

About this bridge

Csah 131 over Sand River is a wood or timber slab carrying Csah 131 over Sand River in St. Louis County, Minnesota. It was built in 1991, so it is 34 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 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 245 vehicles a day, projected to reach 270 by 2039. The structure is 53 ft (16.2 m) long and 38 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCsah 131

CrossesSand River

Location0.3 MI N of JCT TH 53

RouteCounty Highway 131

CountySt. Louis County

StateMinnesota

Coordinates47.63078, -92.55042

Functional classRural Minor Collector

Condition and inspection

Fair

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

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionAugust 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is

Deck geometry8: Equal to present desirable criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating52.1 US tons

Inventory rating37.8 US tons

Structure

Structure typeSlab

MaterialWood or Timber

DeckWood or timber

Main spans3

Design loadHS 20

Structure length53 ft (16.2 m)

Longest span18 ft (5.4 m)

Deck width38 ft (11.6 m)

Roadway width36 ft (11 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic245 (2019)

Projected traffic270 by 2039

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—

NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 131 over Sand River built?

It was built in 1991, making it 34 years old in 2025.

What condition is Csah 131 over Sand 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 August 2023.

How much traffic does Csah 131 over Sand River carry?

About 245 vehicles per day (2019 count).

How long is Csah 131 over Sand River?

The structure is 53 ft (16.2 m) long with a longest span of 18 ft (5.4 m) and a deck 38 ft wide.

Who owns Csah 131 over Sand River?

It is owned by the County Highway Agency.