US Bridges

LOCAL580th ST over Fiddle Creek

PoorPosted for load

Cherokee County, Iowa · 091423001 · Structure no. 000000000108650

Built
1917
108 years old
Condition
Poor
inspected August 2023
Type
Truss - Thru
Steel
Length
48 ft
1 main span
Daily traffic
5
2022 count
Owner
County
County Highway Agency

About this bridge

LOCAL580th ST over Fiddle Creek is a steel truss - thru carrying LOCAL580th ST over Fiddle Creek in Cherokee County, Iowa. It was built in 1917, so it is 108 years old, older than the Iowa average of 45.5 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. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, projected to reach 5 by 2043. The structure is 48 ft (14.6 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLOCAL580th ST
CrossesFiddle Creek
Location091423001
RouteCounty Highway 0
StateIowa
Coordinates42.67746, -95.85422
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating20.8 US tons
Inventory rating12.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length48 ft (14.6 m)
Longest span45 ft (13.7 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2022)
Projected traffic5 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$554,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was LOCAL580th ST over Fiddle Creek built?

It was built in 1917, making it 108 years old in 2025.

What condition is LOCAL580th ST over Fiddle 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 August 2023.

How much traffic does LOCAL580th ST over Fiddle Creek carry?

About 5 vehicles per day (2022 count).

How long is LOCAL580th ST over Fiddle Creek?

The structure is 48 ft (14.6 m) long with a longest span of 45 ft (13.7 m) and a deck 18 ft wide.

Who owns LOCAL580th ST over Fiddle Creek?

It is owned by the County Highway Agency.