US Bridges

Local RD over N Fork Clanton Creek

PoorPosted for load

Madison County, Iowa · 074280906 · Structure no. 000000000232220

Built
1900
125 years old, rebuilt 1985
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
83 ft
1 main span
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

Local RD over N Fork Clanton Creek is a steel stringer/multi-beam or girder carrying Local RD over N Fork Clanton Creek in Madison County, Iowa. It was built in 1900 and reconstructed in 1985, so it is 125 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 3 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 15 vehicles a day, projected to reach 15 by 2044. The structure is 83 ft (25.3 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLocal RD
CrossesN Fork Clanton Creek
Location074280906
RouteCounty Highway 0
StateIowa
Coordinates41.21717, -94.07712
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating4 US tons
Inventory rating0 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadH 15
Structure length83 ft (25.3 m)
Longest span47 ft (14.3 m)
Deck width19 ft (5.8 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic15 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$871,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Local RD over N Fork Clanton Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1985.

What condition is Local RD over N Fork Clanton 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 2024.

How much traffic does Local RD over N Fork Clanton Creek carry?

About 15 vehicles per day (2022 count).

How long is Local RD over N Fork Clanton Creek?

The structure is 83 ft (25.3 m) long with a longest span of 47 ft (14.3 m) and a deck 19 ft wide.

Who owns Local RD over N Fork Clanton Creek?

It is owned by the County Highway Agency.