US Bridges

Cth O over Armstrong Creek

Fair

Lincoln County, Wisconsin · 2.4M S JCT Sth 86 · Structure no. P35091200000000

Built
1937
88 years old
Condition
Fair
inspected June 2023
Type
Slab
Wood or Timber
Length
23 ft
1 main span
Daily traffic
424
2023 count
Owner
County
County Highway Agency

About this bridge

Cth O over Armstrong Creek is a wood or timber slab carrying Cth O over Armstrong Creek in Lincoln County, Wisconsin. It was built in 1937, so it is 88 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 5 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 424 vehicles a day, projected to reach 444 by 2042. The structure is 23 ft (7 m) long and 27 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesCth O
CrossesArmstrong Creek
Location2.4M S JCT Sth 86
RouteCounty Highway 0O
CountyLincoln County
StateWisconsin
Coordinates45.44004, -89.84982
Functional classRural Minor Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating46.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic424 (2023)
Projected traffic444 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth O over Armstrong Creek built?

It was built in 1937, making it 88 years old in 2025.

What condition is Cth O over Armstrong 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 June 2023.

How much traffic does Cth O over Armstrong Creek carry?

About 424 vehicles per day (2023 count).

How long is Cth O over Armstrong Creek?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 27 ft wide.

Who owns Cth O over Armstrong Creek?

It is owned by the County Highway Agency.