US Bridges

Cth M / Century Av over Pheasant Branch Creek

Poor

Dane County, Wisconsin · 0.3M E JCT Cth Q · Structure no. B13005400000000

Built
1956
69 years old, rebuilt 1974
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
22,500
2022 count
Owner
County
County Highway Agency

About this bridge

Cth M / Century Av over Pheasant Branch Creek is a steel stringer/multi-beam or girder carrying Cth M / Century Av over Pheasant Branch Creek in Dane County, Wisconsin. It was built in 1956 and reconstructed in 1974, so it is 69 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 22,500 vehicles a day, projected to reach 27,000 by 2042. The structure is 36 ft (11.1 m) long and 82 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesCth M / Century Av
CrossesPheasant Branch Creek
Location0.3M E JCT Cth Q
RouteCounty Highway 0M
Coordinates43.10597, -89.48364
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating37.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11.1 m)
Longest span36 ft (11.1 m)
Deck width82 ft (24.9 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,500 (2022)
Projected traffic27,000 by 2042
Trucks0%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$375,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth M / Century Av over Pheasant Branch Creek built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1974.

What condition is Cth M / Century Av over Pheasant Branch Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Cth M / Century Av over Pheasant Branch Creek carry?

About 22,500 vehicles per day (2022 count).

How long is Cth M / Century Av over Pheasant Branch Creek?

The structure is 36 ft (11.1 m) long with a longest span of 36 ft (11.1 m) and a deck 82 ft wide.

Who owns Cth M / Century Av over Pheasant Branch Creek?

It is owned by the County Highway Agency.