US Bridges

Sth 73 over Mud Creek

Good

Dane County, Wisconsin · 1.2 M N JCT Cth Pq · Structure no. B13080200000000

Built
2015
10 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
34 ft
2 main spans
Daily traffic
2,300
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 73 over Mud Creek is a concrete culvert carrying Sth 73 over Mud Creek in Dane County, Wisconsin. It was built in 2015, so it is 10 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 2,300 vehicles a day, projected to reach 2,760 by 2042. The structure is 34 ft (10.4 m) long and 130 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSth 73
CrossesMud Creek
Location1.2 M N JCT Cth Pq
RouteState Highway 73
CountyDane County
StateWisconsin
Coordinates43.01789, -89.07164
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection9 ExcellentNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length34 ft (10.4 m)
Longest span12 ft (3.7 m)
Deck width130 ft (39.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2022)
Projected traffic2,760 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$277,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 73 over Mud Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is Sth 73 over Mud 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 June 2023.

How much traffic does Sth 73 over Mud Creek carry?

About 2,300 vehicles per day (2022 count).

How long is Sth 73 over Mud Creek?

The structure is 34 ft (10.4 m) long with a longest span of 12 ft (3.7 m) and a deck 130 ft wide.

Who owns Sth 73 over Mud Creek?

It is owned by the State Highway Agency.