US Bridges

Sth 49 over Comet Creek

Fair

Marathon County, Wisconsin · 3.8M N JCT Cth C · Structure no. B37043100000000

Built
1941
84 years old, rebuilt 1999
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
29 ft
1 main span
Daily traffic
1,900
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 49 over Comet Creek is a concrete slab carrying Sth 49 over Comet Creek in Marathon County, Wisconsin. It was built in 1941 and reconstructed in 1999, so it is 84 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 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 1,900 vehicles a day, roughly 9% of them trucks, projected to reach 2,540 by 2042. The structure is 29 ft (8.7 m) long and 37 ft wide. If it were closed, the detour would be 46.6 mi (75 km).

CarriesSth 49
CrossesComet Creek
Location3.8M N JCT Cth C
RouteState Highway 49
Coordinates44.76101, -89.24452
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 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 rating61.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length29 ft (8.7 m)
Longest span28 ft (8.5 m)
Deck width37 ft (11.4 m)
Roadway width35 ft (10.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2022)
Projected traffic2,540 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed46.6 mi (75 km)
TollOn a free road
National Highway SystemNo

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 49 over Comet Creek built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1999.

What condition is Sth 49 over Comet 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 49 over Comet Creek carry?

About 1,900 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Sth 49 over Comet Creek?

The structure is 29 ft (8.7 m) long with a longest span of 28 ft (8.5 m) and a deck 37 ft wide.

Who owns Sth 49 over Comet Creek?

It is owned by the State Highway Agency.