US Bridges

Sth 66 over Alder CR

Fair

Wood County, Wisconsin · 3.17 Miles E. of Sth 34 · Structure no. B71018000000000

Built
2012
13 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
29 ft
1 main span
Daily traffic
4,600
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 66 over Alder CR is a concrete slab carrying Sth 66 over Alder CR in Wood County, Wisconsin. It was built in 2012, so it is 13 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 4,600 vehicles a day, roughly 4% of them trucks, projected to reach 5,520 by 2041. The structure is 29 ft (8.7 m) long and 47 ft wide. If it were closed, the detour would be 13.7 mi (22 km).

Location

Open in Google Maps
CarriesSth 66
CrossesAlder CR
Location3.17 Miles E. of Sth 34
RouteState Highway 66
CountyWood County
StateWisconsin
Coordinates44.44947, -89.75414
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating46.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length29 ft (8.7 m)
Longest span26 ft (7.9 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,600 (2021)
Projected traffic5,520 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13.7 mi (22 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkNon-Interstate STRAHNET route

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 66 over Alder CR built?

It was built in 2012, making it 13 years old in 2025.

What condition is Sth 66 over Alder CR 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 September 2023.

How much traffic does Sth 66 over Alder CR carry?

About 4,600 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Sth 66 over Alder CR?

The structure is 29 ft (8.7 m) long with a longest span of 26 ft (7.9 m) and a deck 47 ft wide.

Who owns Sth 66 over Alder CR?

It is owned by the State Highway Agency.