US Bridges

Csah 21 over Storer Creek

Fair

Houston County, Minnesota · 2.1 MI E of JCT Csah 9 · Structure no. 91479

Built
1977
48 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
36 ft
3 main spans
Daily traffic
382
2021 count
Owner
County
County Highway Agency

About this bridge

Csah 21 over Storer Creek is a concrete culvert carrying Csah 21 over Storer Creek in Houston County, Minnesota. It was built in 1977, so it is 48 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 6 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 382 vehicles a day, projected to reach 370 by 2041. The structure is 36 ft (11.1 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesCsah 21
CrossesStorer Creek
Location2.1 MI E of JCT Csah 9
RouteCounty Highway 21
CountyHouston County
StateMinnesota
Coordinates43.78494, -91.48449
Functional classRural Minor 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length36 ft (11.1 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic382 (2021)
Projected traffic370 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 21 over Storer Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Csah 21 over Storer Creek 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 21 over Storer Creek carry?

About 382 vehicles per day (2021 count).

How long is Csah 21 over Storer Creek?

The structure is 36 ft (11.1 m) long with a longest span of 11 ft (3.5 m).

Who owns Csah 21 over Storer Creek?

It is owned by the County Highway Agency.