US Bridges

Csah 21 over TH 169R

Fair

Scott County, Minnesota · 0.8 MI E of JCT TH 169 · Structure no. 70529

Built
1994
31 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
232 ft
2 main spans
Daily traffic
13,000
2019 count
Owner
State
State Highway Agency

About this bridge

Csah 21 over TH 169R is a prestressed concrete stringer/multi-beam or girder carrying Csah 21 over TH 169R in Scott 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 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 13,000 vehicles a day, roughly 3% of them trucks, projected to reach 12,500 by 2039. The structure is 232 ft (70.6 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCsah 21
CrossesTH 169R
Location0.8 MI E of JCT TH 169
RouteCounty Highway 21
CountyScott County
StateMinnesota
Coordinates44.78391, -93.41298
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102.2 US tons
Inventory rating59.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length232 ft (70.6 m)
Longest span120 ft (36.5 m)
Deck width56 ft (17.1 m)
Roadway width53 ft (16.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,000 (2019)
Projected traffic12,500 by 2039
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 21 over TH 169R built?

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

What condition is Csah 21 over TH 169R 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 May 2023.

How much traffic does Csah 21 over TH 169R carry?

About 13,000 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Csah 21 over TH 169R?

The structure is 232 ft (70.6 m) long with a longest span of 120 ft (36.5 m) and a deck 56 ft wide.

Who owns Csah 21 over TH 169R?

It is owned by the State Highway Agency.