US Bridges

Csah 20 over BNSF RR

Fair

Morrison County, Minnesota · 0.2 MI N of JCT TH 10 · Structure no. 4558

Built
1928
97 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
153 ft
5 main spans
Daily traffic
305
2020 count
Owner
County
County Highway Agency

About this bridge

Csah 20 over BNSF RR is a steel continuous stringer/multi-beam or girder carrying Csah 20 over BNSF RR in Morrison County, Minnesota. It was built in 1928, so it is 97 years old, older 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 305 vehicles a day, roughly 73% of them trucks, projected to reach 305 by 2040. The structure is 153 ft (46.6 m) long and 46 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCsah 20
CrossesBNSF RR
Location0.2 MI N of JCT TH 10
RouteCounty Highway 20
CountyMorrison County
StateMinnesota
Coordinates46.17554, -94.60924
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating76.1 US tons
Inventory rating45.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span40 ft (12.2 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic305 (2020)
Projected traffic305 by 2040
Trucks73%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed6.8 mi (11 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Csah 20 over BNSF RR built?

It was built in 1928, making it 97 years old in 2025.

What condition is Csah 20 over BNSF RR 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 October 2024.

How much traffic does Csah 20 over BNSF RR carry?

About 305 vehicles per day (2020 count), of which roughly 73% are trucks.

How long is Csah 20 over BNSF RR?

The structure is 153 ft (46.6 m) long with a longest span of 40 ft (12.2 m) and a deck 46 ft wide.

Who owns Csah 20 over BNSF RR?

It is owned by the County Highway Agency.