US Bridges

Sth 27 Nb-Black Ri over IH 90

Fair

Monroe County, Wisconsin · 4.0M N JCT Cth J · Structure no. B41008300000000

Built
1968
57 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
210 ft
2 main spans
Daily traffic
11,700
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 27 Nb-Black Ri over IH 90 is a steel continuous stringer/multi-beam or girder carrying Sth 27 Nb-Black Ri over IH 90 in Monroe County, Wisconsin. It was built in 1968, 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 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 11,700 vehicles a day, roughly 10% of them trucks, projected to reach 14,040 by 2041. The structure is 210 ft (64.1 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSth 27 Nb-Black Ri
CrossesIH 90
Location4.0M N JCT Cth J
RouteState Highway 27
CountyMonroe County
StateWisconsin
Coordinates43.9202, -90.8212
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length210 ft (64.1 m)
Longest span103 ft (31.5 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,700 (2021)
Projected traffic14,040 by 2041
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 27 Nb-Black Ri over IH 90 built?

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

What condition is Sth 27 Nb-Black Ri over IH 90 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 August 2024.

How much traffic does Sth 27 Nb-Black Ri over IH 90 carry?

About 11,700 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Sth 27 Nb-Black Ri over IH 90?

The structure is 210 ft (64.1 m) long with a longest span of 103 ft (31.5 m) and a deck 43 ft wide.

Who owns Sth 27 Nb-Black Ri over IH 90?

It is owned by the State Highway Agency.