US Bridges

Csah 4 over Embarrass River

Good

St. Louis County, Minnesota · 1.7 MI S of JCT TH 135 · Structure no. 69540

Built
1981
44 years old
Condition
Good
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
1,450
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 4 over Embarrass River is a prestressed concrete tee beam carrying Csah 4 over Embarrass River in St. Louis County, Minnesota. It was built in 1981, so it is 44 years old, older 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 1,450 vehicles a day, projected to reach 1,350 by 2039. The structure is 56 ft (17.2 m) long and 45 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesCsah 4
CrossesEmbarrass River
Location1.7 MI S of JCT TH 135
RouteCounty Highway 4
Coordinates47.50946, -92.33629
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length56 ft (17.2 m)
Longest span55 ft (16.8 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,450 (2019)
Projected traffic1,350 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$1,000 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 4 over Embarrass River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Csah 4 over Embarrass 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 2024.

How much traffic does Csah 4 over Embarrass River carry?

About 1,450 vehicles per day (2019 count).

How long is Csah 4 over Embarrass River?

The structure is 56 ft (17.2 m) long with a longest span of 55 ft (16.8 m) and a deck 45 ft wide.

Who owns Csah 4 over Embarrass River?

It is owned by the County Highway Agency.