US Bridges

Csah 20 over Thompson Creek

Good

Houston County, Minnesota · 0.2 MI S of JCT TH 44 · Structure no. 28513

Built
1981
44 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
118 ft
3 main spans
Daily traffic
162
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 20 over Thompson Creek is a steel continuous stringer/multi-beam or girder carrying Csah 20 over Thompson Creek in Houston 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 162 vehicles a day, projected to reach 230 by 2041. The structure is 118 ft (36.1 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesCsah 20
CrossesThompson Creek
Location0.2 MI S of JCT TH 44
RouteCounty Highway 20
Coordinates43.73301, -91.38661
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66.1 US tons
Inventory rating39.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length118 ft (36.1 m)
Longest span45 ft (13.7 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic162 (2021)
Projected traffic230 by 2041
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 20 over Thompson Creek built?

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

What condition is Csah 20 over Thompson Creek 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 20 over Thompson Creek carry?

About 162 vehicles per day (2021 count).

How long is Csah 20 over Thompson Creek?

The structure is 118 ft (36.1 m) long with a longest span of 45 ft (13.7 m) and a deck 35 ft wide.

Who owns Csah 20 over Thompson Creek?

It is owned by the County Highway Agency.