US Bridges

Csah 49 over Thief River

Good

Marshall County, Minnesota · 3.5 MI N of JCT Csah 6 · Structure no. 45549

Built
1994
31 years old
Condition
Good
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
87 ft
3 main spans
Daily traffic
115
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 49 over Thief River is a prestressed concrete tee beam carrying Csah 49 over Thief River in Marshall County, Minnesota. It was built in 1994, so it is 31 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 115 vehicles a day, projected to reach 95 by 2038. The structure is 87 ft (26.5 m) long and 36 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesCsah 49
CrossesThief River
Location3.5 MI N of JCT Csah 6
RouteCounty Highway 49
Coordinates48.48798, -95.95265
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.7 US tons
Inventory rating54.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length87 ft (26.5 m)
Longest span29 ft (8.8 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115 (2018)
Projected traffic95 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 49 over Thief River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Csah 49 over Thief 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 October 2024.

How much traffic does Csah 49 over Thief River carry?

About 115 vehicles per day (2018 count).

How long is Csah 49 over Thief River?

The structure is 87 ft (26.5 m) long with a longest span of 29 ft (8.8 m) and a deck 36 ft wide.

Who owns Csah 49 over Thief River?

It is owned by the County Highway Agency.