US Bridges

Csah 138 over Embarrass River

Good

St. Louis County, Minnesota · 1.5 MI N of JCT TH 135 · Structure no. 69577

Built
1987
38 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
231 ft
3 main spans
Daily traffic
880
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 138 over Embarrass River is a prestressed concrete stringer/multi-beam or girder carrying Csah 138 over Embarrass River in St. Louis County, Minnesota. It was built in 1987, so it is 38 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 880 vehicles a day, projected to reach 830 by 2039. The structure is 231 ft (70.3 m) long and 39 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

CarriesCsah 138
CrossesEmbarrass River
Location1.5 MI N of JCT TH 135
RouteCounty Highway 138
Coordinates47.54926, -92.28979
Functional classRural Major Collector

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 rating45.7 US tons
Inventory rating27.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length231 ft (70.3 m)
Longest span75 ft (22.9 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic880 (2019)
Projected traffic830 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 138 over Embarrass River built?

It was built in 1987, making it 38 years old in 2025.

What condition is Csah 138 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 138 over Embarrass River carry?

About 880 vehicles per day (2019 count).

How long is Csah 138 over Embarrass River?

The structure is 231 ft (70.3 m) long with a longest span of 75 ft (22.9 m) and a deck 39 ft wide.

Who owns Csah 138 over Embarrass River?

It is owned by the County Highway Agency.