US Bridges

Csah 23 over Stony Brook

Good

Benton County, Minnesota · 0.9 MI S of JCT TH 95 · Structure no. 96909

Built
1989
36 years old
Condition
Good
inspected October 2022
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
410
2019 count
Owner
County
County Highway Agency

About this bridge

Csah 23 over Stony Brook is a concrete culvert carrying Csah 23 over Stony Brook in Benton County, Minnesota. It was built in 1989, so it is 36 years old, younger 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 410 vehicles a day, projected to reach 365 by 2039. The structure is 29 ft (8.9 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCsah 23
CrossesStony Brook
Location0.9 MI S of JCT TH 95
RouteCounty Highway 23
CountyBenton County
StateMinnesota
Coordinates45.57528, -93.94497
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 spans2
Design loadHS 20
Structure length29 ft (8.9 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 traffic410 (2019)
Projected traffic365 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 23 over Stony Brook built?

It was built in 1989, making it 36 years old in 2025.

What condition is Csah 23 over Stony Brook 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 2022.

How much traffic does Csah 23 over Stony Brook carry?

About 410 vehicles per day (2019 count).

How long is Csah 23 over Stony Brook?

The structure is 29 ft (8.9 m) long with a longest span of 11 ft (3.5 m).

Who owns Csah 23 over Stony Brook?

It is owned by the County Highway Agency.