US Bridges

Sth 164 over Mill Creek

Good

Waukesha County, Wisconsin · 3.2 MI N JCT IH 43 · Structure no. B67002100000000

Built
1968
57 years old, rebuilt 2000
Condition
Good
inspected August 2023
Type
Culvert
Concrete Continuous
Length
30 ft
3 main spans
Daily traffic
20,800
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 164 over Mill Creek is a concrete continuous culvert carrying Sth 164 over Mill Creek in Waukesha County, Wisconsin. It was built in 1968 and reconstructed in 2000, so it is 57 years old, older 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 20,800 vehicles a day, roughly 7% of them trucks, projected to reach 24,960 by 2042. The structure is 30 ft (9.2 m) long. If it were closed, the detour would be 2.5 mi (4 km).

CarriesSth 164
CrossesMill Creek
Location3.2 MI N JCT IH 43
RouteState Highway 164
Coordinates42.95613, -88.22799
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 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 alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length30 ft (9.2 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,800 (2022)
Projected traffic24,960 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

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 164 over Mill Creek built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2000.

What condition is Sth 164 over Mill 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 2023.

How much traffic does Sth 164 over Mill Creek carry?

About 20,800 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Sth 164 over Mill Creek?

The structure is 30 ft (9.2 m) long with a longest span of 9 ft (2.7 m).

Who owns Sth 164 over Mill Creek?

It is owned by the State Highway Agency.