US Bridges

Sth 133 over Mill Branch

Good

Grant County, Wisconsin · 3.2M N JCT Cth Y · Structure no. B22013600000000

Built
1993
32 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
950
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 133 over Mill Branch is a prestressed concrete stringer/multi-beam or girder carrying Sth 133 over Mill Branch in Grant County, Wisconsin. It was built in 1993, so it is 32 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 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 950 vehicles a day, roughly 10% of them trucks, projected to reach 1,020 by 2042. The structure is 62 ft (18.8 m) long and 38 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

CarriesSth 133
CrossesMill Branch
Location3.2M N JCT Cth Y
RouteState Highway 133
Coordinates42.70425, -90.95642
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.6 US tons
Inventory rating46.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (18.8 m)
Longest span60 ft (18.3 m)
Deck width38 ft (11.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2021)
Projected traffic1,020 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 133 over Mill Branch built?

It was built in 1993, making it 32 years old in 2025.

What condition is Sth 133 over Mill Branch 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 September 2023.

How much traffic does Sth 133 over Mill Branch carry?

About 950 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Sth 133 over Mill Branch?

The structure is 62 ft (18.8 m) long with a longest span of 60 ft (18.3 m) and a deck 38 ft wide.

Who owns Sth 133 over Mill Branch?

It is owned by the State Highway Agency.