US Bridges

Cth Y over Blums Creek

Poor

Dane County, Wisconsin · 2.7M E JCT Cth Kp · Structure no. B13059400000000

Built
1939
86 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
580
2022 count
Owner
County
County Highway Agency

About this bridge

Cth Y over Blums Creek is a steel stringer/multi-beam or girder carrying Cth Y over Blums Creek in Dane County, Wisconsin. It was built in 1939, so it is 86 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 580 vehicles a day, projected to reach 638 by 2043. The structure is 26 ft (7.9 m) long and 33 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesCth Y
CrossesBlums Creek
Location2.7M E JCT Cth Kp
RouteCounty Highway 0Y
CountyDane County
StateWisconsin
Coordinates43.265, -89.63219
Functional classRural Minor Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic580 (2022)
Projected traffic638 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 km)
TollOn a free road
National Highway SystemNo

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$177,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth Y over Blums Creek built?

It was built in 1939, making it 86 years old in 2025.

What condition is Cth Y over Blums 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 November 2024.

How much traffic does Cth Y over Blums Creek carry?

About 580 vehicles per day (2022 count).

How long is Cth Y over Blums Creek?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 33 ft wide.

Who owns Cth Y over Blums Creek?

It is owned by the County Highway Agency.