US Bridges

Sth 85 over Rock Creek

Good

Dunn County, Wisconsin · 5.2M E JCT Cth O · Structure no. B17022600000000

Built
2021
4 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
141 ft
1 main span
Daily traffic
2,800
2023 count
Owner
State
State Highway Agency

About this bridge

Sth 85 over Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying Sth 85 over Rock Creek in Dunn County, Wisconsin. It was built in 2021, so it is 4 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,800 vehicles a day, projected to reach 3,600 by 2043. The structure is 141 ft (43.1 m) long and 39 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesSth 85
CrossesRock Creek
Location5.2M E JCT Cth O
RouteState Highway 85
Coordinates44.71842, -91.69602
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating40.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length141 ft (43.1 m)
Longest span137 ft (41.8 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,800 (2023)
Projected traffic3,600 by 2043
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 85 over Rock Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is Sth 85 over Rock Creek 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 August 2024.

How much traffic does Sth 85 over Rock Creek carry?

About 2,800 vehicles per day (2023 count).

How long is Sth 85 over Rock Creek?

The structure is 141 ft (43.1 m) long with a longest span of 137 ft (41.8 m) and a deck 39 ft wide.

Who owns Sth 85 over Rock Creek?

It is owned by the State Highway Agency.