US Bridges

Cth M (north Ave) over Underwood Creek

Good

Waukesha County, Wisconsin · 0.1 M W JCT Lilly Road · Structure no. B67037500000000

Built
2021
4 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete
Length
52 ft
1 main span
Daily traffic
4,550
2022 count
Owner
County
County Highway Agency

About this bridge

Cth M (north Ave) over Underwood Creek is a concrete slab carrying Cth M (north Ave) over Underwood Creek in Waukesha 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 4,550 vehicles a day, roughly 4% of them trucks, projected to reach 5,460 by 2042. The structure is 52 ft (16 m) long and 55 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCth M (north Ave)
CrossesUnderwood Creek
Location0.1 M W JCT Lilly Road
RouteCounty Highway 0M
CountyWaukesha County
StateWisconsin
Coordinates43.06064, -88.08849
Functional classUrban Other Principal 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 protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating45.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length52 ft (16 m)
Longest span50 ft (15.2 m)
Deck width55 ft (16.7 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,550 (2022)
Projected traffic5,460 by 2042
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$492,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth M (north Ave) over Underwood Creek built?

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

What condition is Cth M (north Ave) over Underwood 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 Cth M (north Ave) over Underwood Creek carry?

About 4,550 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Cth M (north Ave) over Underwood Creek?

The structure is 52 ft (16 m) long with a longest span of 50 ft (15.2 m) and a deck 55 ft wide.

Who owns Cth M (north Ave) over Underwood Creek?

It is owned by the County Highway Agency.