US Bridges

FR172 over Fishtrap Creek

Fair

Sawyer County, Wisconsin · 4.8 M. W. JCT Cth Gg · Structure no. 090204000001009

Built
1985
40 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
20
1978 count
Owner
Federal
U.S. Forest Service

About this bridge

FR172 over Fishtrap Creek is a prestressed concrete box beam or girders - multiple carrying FR172 over Fishtrap Creek in Sawyer County, Wisconsin. It was built in 1985, so it is 40 years old, younger 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 20 vehicles a day, projected to reach 30 by 2045. The structure is 44 ft (13.3 m) long and 24 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesFR172
CrossesFishtrap Creek
Location4.8 M. W. JCT Cth Gg
RouteFederal Lands Road 172
CountySawyer County
StateWisconsin
Coordinates45.9742, -90.94067
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating67.1 US tons
Inventory rating51.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length44 ft (13.3 m)
Longest span41 ft (12.6 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (1978)
Projected traffic30 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was FR172 over Fishtrap Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is FR172 over Fishtrap 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 August 2023.

How much traffic does FR172 over Fishtrap Creek carry?

About 20 vehicles per day (1978 count).

How long is FR172 over Fishtrap Creek?

The structure is 44 ft (13.3 m) long with a longest span of 41 ft (12.6 m) and a deck 24 ft wide.

Who owns FR172 over Fishtrap Creek?

It is owned by the U.S. Forest Service.