US Bridges

IH 39 NB over Cmstpp RR

Fair

Columbia County, Wisconsin · 2.3M N JCT Sth 33 to E · Structure no. B11005800000000

Built
1964
61 years old, rebuilt 1990
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
156 ft
3 main spans
Daily traffic
10,050
2021 count
Owner
State
State Highway Agency

About this bridge

IH 39 NB over Cmstpp RR is a steel continuous stringer/multi-beam or girder carrying IH 39 NB over Cmstpp RR in Columbia County, Wisconsin. It was built in 1964 and reconstructed in 1990, so it is 61 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 10,050 vehicles a day, roughly 10% of them trucks, projected to reach 12,060 by 2041. The structure is 156 ft (47.5 m) long and 35 ft wide.

Location

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CarriesIH 39 NB
CrossesCmstpp RR
Location2.3M N JCT Sth 33 to E
RouteInterstate 39
CountyColumbia County
StateWisconsin
Coordinates43.55489, -89.4951
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
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 Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length156 ft (47.5 m)
Longest span58 ft (17.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,050 (2021)
Projected traffic12,060 by 2041
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$968,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was IH 39 NB over Cmstpp RR built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1990.

What condition is IH 39 NB over Cmstpp RR 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 January 2024.

How much traffic does IH 39 NB over Cmstpp RR carry?

About 10,050 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is IH 39 NB over Cmstpp RR?

The structure is 156 ft (47.5 m) long with a longest span of 58 ft (17.8 m) and a deck 35 ft wide.

Who owns IH 39 NB over Cmstpp RR?

It is owned by the State Highway Agency.