Csah 91 over Dry Run

Fair

Dakota County, Minnesota · 2.2 MI SW of JCT TH 61 · Structure no. L3935

Built: 1968; 57 years old
Condition: Fair; inspected November 2023
Type: Culvert; Steel
Length: 24 ft; 4 main spans
Daily traffic: 110; 2018 count
Owner: County; County Highway Agency

About this bridge

Csah 91 over Dry Run is a steel culvert carrying Csah 91 over Dry Run in Dakota County, Minnesota. It was built in 1968, so it is 57 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 110 vehicles a day, roughly 14% of them trucks, projected to reach 125 by 2038. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCsah 91

CrossesDry Run

Location2.2 MI SW of JCT TH 61

RouteCounty Highway 91

CountyDakota County

StateMinnesota

Coordinates44.57233, -92.81589

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.

Component	Rating	Meaning
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.
Culvert	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionNovember 2023

Inspection intervalevery 24 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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is

Operating rating43.2 US tons

Inventory rating28.8 US tons

Structure

Structure typeCulvert

MaterialSteel

DeckNot applicable

Main spans4

Design loadUnknown

Structure length24 ft (7.3 m)

Longest span4 ft (1.2 m)

Deck width0 ft (0 m)

Roadway width0 ft (0 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2018)

Projected traffic125 by 2038

Trucks14%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

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$105 million

NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 91 over Dry Run built?

It was built in 1968, making it 57 years old in 2025.

What condition is Csah 91 over Dry Run 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 November 2023.

How much traffic does Csah 91 over Dry Run carry?

About 110 vehicles per day (2018 count), of which roughly 14% are trucks.

How long is Csah 91 over Dry Run?

The structure is 24 ft (7.3 m) long with a longest span of 4 ft (1.2 m).

Who owns Csah 91 over Dry Run?

It is owned by the County Highway Agency.