US Bridges

Sth 181 Sb-N 76th over Cnw RR

Fair

Milwaukee County, Wisconsin · 1.0M S JCT Sth 100 to N · Structure no. B40038000000000

Built
1969
56 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
162 ft
3 main spans
Daily traffic
11,750
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 181 Sb-N 76th over Cnw RR is a steel continuous stringer/multi-beam or girder carrying Sth 181 Sb-N 76th over Cnw RR in Milwaukee County, Wisconsin. It was built in 1969, so it is 56 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 11,750 vehicles a day, roughly 6% of them trucks, projected to reach 48,700 by 2043. The structure is 162 ft (49.3 m) long and 46 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesSth 181 Sb-N 76th
CrossesCnw RR
Location1.0M S JCT Sth 100 to N
RouteState Highway 181
CountyMilwaukee County
StateWisconsin
Coordinates43.16731, -88.0048
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.6 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length162 ft (49.3 m)
Longest span60 ft (18.3 m)
Deck width46 ft (13.9 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,750 (2022)
Projected traffic48,700 by 2043
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed0.6 mi (1 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sth 181 Sb-N 76th over Cnw RR built?

It was built in 1969, making it 56 years old in 2025.

What condition is Sth 181 Sb-N 76th over Cnw RR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does Sth 181 Sb-N 76th over Cnw RR carry?

About 11,750 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Sth 181 Sb-N 76th over Cnw RR?

The structure is 162 ft (49.3 m) long with a longest span of 60 ft (18.3 m) and a deck 46 ft wide.

Who owns Sth 181 Sb-N 76th over Cnw RR?

It is owned by the State Highway Agency.