US Bridges

Sth 59 over Saylesville Creek

Fair

Waukesha County, Wisconsin · 1.4 MI E JCT Sth 83 · Structure no. B67022400000000

Built
1991
34 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
8,800
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 59 over Saylesville Creek is a prestressed concrete stringer/multi-beam or girder carrying Sth 59 over Saylesville Creek in Waukesha County, Wisconsin. It was built in 1991, so it is 34 years old, younger 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 6 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 8,800 vehicles a day, roughly 5% of them trucks, projected to reach 10,560 by 2042. The structure is 41 ft (12.4 m) long and 46 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesSth 59
CrossesSaylesville Creek
Location1.4 MI E JCT Sth 83
RouteState Highway 59
Coordinates42.9601, -88.33479
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 23 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.7 US tons
Inventory rating48.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length41 ft (12.4 m)
Longest span39 ft (11.9 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,800 (2022)
Projected traffic10,560 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 59 over Saylesville Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Sth 59 over Saylesville Creek 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 October 2023.

How much traffic does Sth 59 over Saylesville Creek carry?

About 8,800 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Sth 59 over Saylesville Creek?

The structure is 41 ft (12.4 m) long with a longest span of 39 ft (11.9 m) and a deck 46 ft wide.

Who owns Sth 59 over Saylesville Creek?

It is owned by the State Highway Agency.