US Bridges

Sth 21 over Branch Lemonweir Creek

Good

Monroe County, Wisconsin · 2.6M E JCT Sth 173 · Structure no. B41022200000000

Built
2000
25 years old
Condition
Good
inspected October 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
96 ft
2 main spans
Daily traffic
4,700
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 21 over Branch Lemonweir Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 21 over Branch Lemonweir Creek in Monroe County, Wisconsin. It was built in 2000, so it is 25 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,700 vehicles a day, roughly 9% of them trucks, projected to reach 5,640 by 2041. The structure is 96 ft (29.2 m) long and 45 ft wide. If it were closed, the detour would be 10.6 mi (17 km).

CarriesSth 21
CrossesBranch Lemonweir Creek
Location2.6M E JCT Sth 173
RouteState Highway 21
Coordinates44.02696, -90.36014
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating46.4 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length96 ft (29.2 m)
Longest span46 ft (14 m)
Deck width45 ft (13.8 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,700 (2021)
Projected traffic5,640 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed10.6 mi (17 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 21 over Branch Lemonweir Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is Sth 21 over Branch Lemonweir Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2022.

How much traffic does Sth 21 over Branch Lemonweir Creek carry?

About 4,700 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Sth 21 over Branch Lemonweir Creek?

The structure is 96 ft (29.2 m) long with a longest span of 46 ft (14 m) and a deck 45 ft wide.

Who owns Sth 21 over Branch Lemonweir Creek?

It is owned by the State Highway Agency.