US Bridges

Sth 100 Nb|brown D over Cnw RR

Fair

Milwaukee County, Wisconsin · 1.2M E JCT Sth 145 · Structure no. B40049000000000

Built
1976
49 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
548 ft
6 main spans
Daily traffic
9,300
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 100 Nb|brown D over Cnw RR is a steel continuous stringer/multi-beam or girder carrying Sth 100 Nb|brown D over Cnw RR in Milwaukee County, Wisconsin. It was built in 1976, so it is 49 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 9,300 vehicles a day, roughly 3% of them trucks, projected to reach 12,143 by 2043. The structure is 548 ft (167.1 m) long and 47 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSth 100 Nb|brown D
CrossesCnw RR
Location1.2M E JCT Sth 145
RouteState Highway 100
Coordinates43.17765, -88.04929
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating35.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length548 ft (167.1 m)
Longest span101 ft (30.8 m)
Deck width47 ft (14.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,300 (2022)
Projected traffic12,143 by 2043
Trucks3%
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sth 100 Nb|brown D over Cnw RR built?

It was built in 1976, making it 49 years old in 2025.

What condition is Sth 100 Nb|brown D 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 100 Nb|brown D over Cnw RR carry?

About 9,300 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Sth 100 Nb|brown D over Cnw RR?

The structure is 548 ft (167.1 m) long with a longest span of 101 ft (30.8 m) and a deck 47 ft wide.

Who owns Sth 100 Nb|brown D over Cnw RR?

It is owned by the State Highway Agency.